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  • 1.
    Ananno, Anan Ashrabi
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Masud, Mahadi Hasan
    RMIT Univ, Australia; Rajshahi Univ Engn & Technol, Bangladesh.
    Chowdhury, Sami Ahbab
    Rajshahi Univ Engn & Technol, Bangladesh.
    Dabnichki, Peter
    RMIT Univ, Australia.
    Ahmed, Nufile
    Rajshahi Univ Engn & Technol, Bangladesh.
    Arefin, Amit Md. Estiaque
    Texas Tech Univ, TX 79409 USA.
    Sustainable food waste management model for Bangladesh2021Inngår i: Sustainable Production and Consumption, ISSN 2352-5509, Vol. 27, s. 35-51Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    Excessive food waste (nearly 1.3 billion tons per annum) has exacerbated the world hunger crisis. This comprehensive review focuses on the food waste scenario, adverse effects, food waste management, existing waste management policies, and regulations in Bangladesh. Municipalities and urban centers generate 3.78 million tons of waste each year (15.96% of total food waste). This study utilized the national database to analyze food waste generation and projected growth by the year 2050. Yearly an estimated 17215.2 thousand acres of land and a significant amount of natural resources (water, energy) are being used to produce 23691.15 thousand tons of wasted food (45% of total food production). This study critically analyzed the waste management policy gap of Bangladesh and clearly identified each stage of the food loss production supply chain. The study assessed that yearly 481.6 MW energy could be generated from food waste. Focusing on effective policy and sustainability, a national food waste management model has been proposed for Bangladesh in compliance with sustainable development goals 12.3.1 global food loss. Food accumulates 16.7% to 20% of the world economy; therefore, any measures taken to reduce the food waste will be economically beneficial and environmentally sustainable. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

  • 2.
    Ananno, Anan Ashrabi
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Masud, Mahadi Hasan
    RMIT Univ, Australia; Rajshahi Univ Engn & Technol, Bangladesh.
    Dabnichki, Peter
    RMIT Univ, Australia.
    Mahjabeen, Mosarrat
    Shaheed Suhrawardy Med Coll, Bangladesh.
    Chowdhury, Sami Ahbab
    Rajshahi Univ Engn & Technol, Bangladesh.
    Survey and analysis of consumers behaviour for electronic waste management in Bangladesh2021Inngår i: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 282, artikkel-id 111943Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper aims to establish consumers perception of electric waste recycling and management on a national scale in Bangladesh. The attitude, willingness to pay (WTP) and consumers behaviour were explored by conducting a questionnaire-based survey. The conclusions are based on 915 valid responses out of 2000 online survey invitations. Interestingly, 37.9% of the respondents indicated that they would accept to pay for electronic waste recycling. Analysis also shows that the preferred WTP would cover 5-10% of the recycling cost. Factors like environmental awareness, monthly income, and education level affect the consumers WTP. Nevertheless, most of the participants believe that the Government should share the recycling cost. The study suggests that e-waste recycling can be stimulated by promoting environmental awareness, educating the public about the benefits of recycling e-waste, and making e-waste recycling more convenient. However, additional measures will likely be needed to tackle the e-waste problem. Thus, support for environmental education is imperative in order to promote environmental awareness and increase the WTP of consumers. The study outlines key characteristics of consumer-focused e-waste management archetypes and proposes an effective road map for Bangladesh.

  • 3.
    Ananno, Anan Ashrabi
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Ribeiro, Luis
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    A Multi-Heuristic Algorithm for Multi-Container 3-D Bin Packing Problem Optimization Using Real World Constraints2024Inngår i: IEEE Access, E-ISSN 2169-3536, Vol. 12, s. 42105-42130Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    With the growing demand for sustainable and optimal packaging solutions, this study proposes a novel two-stage algorithm for the multi-container three-dimensional bin packing problem. The research addresses this problem within the context of a real-world industrial scenario and implements several practical constraints including: full shipment, customer positioning requirements, and product geometric interlocking, for increased stability and with the purpose of minimizing the use of plastic wrapping and/or additional supporting surfaces. The main optimization target is to minimize the total number of containers used in the palletization process of custom orders with varying degrees of complexity. The proposed algorithm includes two stages/phases of processing. In the first phase, the algorithm uses constructive heuristics to generate homogeneous product layers. The layers are then stacked to produce blocks, which are then placed on individual containers or pallets. The second phase packs the leftover items using a genetic algorithm. The performance of the proposed solution is benchmarked using real-world industrial data, as well as a more classic academic benchmark. It is demonstrated, across a very large set of orders, that the algorithm always achieves solutions for full palletization of the orders. The analysis shows that the approach is generic and the quality of the solutions generated is relatively even for both small and large, homogeneous and heterogeneous problem instances.

  • 4.
    Bengtsson, Marie
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Företagsekonomi. Linköpings universitet, Filosofiska fakulteten.
    Ruiz, Juan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Företagsekonomi. Linköpings universitet, Filosofiska fakulteten.
    Wever, Renee
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    This is how we roll; A play on creative thought and the generation of novelty2019Inngår i: Proceedings of Meaningful Play 2018 / [ed] RABINDRA RATAN, BRIAN WINN, & Elizabeth LaPensée, ETC press, 2019, s. 380-387Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper examines generation of novelty and creative dynamics in design teams that aim at arrivingat something truly novel. Looking at the works by Schumpeter, Campbell and March in explorationsfor solutions that go beyond what could be easily foreseeable and the works of Smith, Lindsey,Cardoso among others, in the field of design fixation, this paper explores an approach taken tointroduce elements of randomness in design exercises to prevent fixation and facilitate aimless andunguided explorations. The dynamic explained in this paper presents the utilization of a game-baseddynamic in design teams that facilitates the generation of novel ideas.

    Fulltekst (pdf)
    fulltext
  • 5.
    Berglund, Moa
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Upcycle and Repurpose Driven Design: A case study at ReTuna Återbruksgalleria2022Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    How can we use more of the materials and products that have already been produced? At the second hand shopping mall ReTuna in Eskilstuna, where circular flows are a reality, there are still many products going to waste. This master thesis project explores the possibilities of upcycle and repurpose driven design, and by that adding new value to existing products. The process of doing that is the basis of this report. 

    ReTuna Återbruksgalleria is a place where people can leave products they do not want or need anymore.Everyday hundreds of products are left for reuse at ReTuna, which is connected to the overconsumptionthat results in copious amounts of second hand products. Much more than can be taken care of in today’s system. The resources put into every product needs to be valued accordingly to what they truly cost and emit. 

    This master’s thesis project explores how to design within the planetary boundaries by taking care and responsibility for what already is produced.

    The first phase of the project consists of observations and interviews to get an understanding of how ReTuna works. The framing of the project was decided after the research phase, which resulted in focus on one specific product, dining chairs. The next part of the project involves upcycling workshops, building of prototypes and an exhibition, all with a focus on increasing the value for second hand chairsand giving the material new areas of use. The last part of the project presents a design result, with an approach for involving more repurpose driven design and upcycling within design and product development.

    Fulltekst (pdf)
    Berglund Moa_Upcycle and Repurpose Driven Design
  • 6.
    Berglund, Moa
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska fakulteten.
    Bystedt, Sofia
    ReTuna Återbruksgalleria.
    Eklöf, David
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    van Den Bosch, Martijn
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Wever, Renee
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Chair a Story – What Repurpose-Driven Design can contribute to upcycling more dining room chairs2023Inngår i: PLATE - Product Lifetimes and the Environment / [ed] Niinimäki, Kirsi; Cura, Kirsti, 2023, s. 109-115Konferansepaper (Fagfellevurdert)
    Fulltekst (pdf)
    fulltext
  • 7.
    Bergström, Emmy
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Lundberg, Robert
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Hur fabriksflöden kan visualiseras med hjälp av Unreal Engine2023Independent thesis Basic level (degree of Bachelor), 12 hpOppgave
    Abstract [en]

    Virtual Reality (VR) is a tool with great potential and is under constant development for use in new fields. The project Fabriksvisualisering (Factory Visualization), has within the digital factory field, developed a tool for companies to build their factories in Unreal Engine (UE) and VR. The tool gives companies the opportunity to test their factory layouts, before implementing in the real world, to avoid costly mistakes. The following report examines possibilities for users to simulate and visualize their factory workflows as a part of the project Fabriksvisualisering. To achieve this, different solutions for visualizing the flow of products, staff and vehicles have been explored. User tests were carried out to test how an effect from UE can be used to visualize a flow of products in VR. The result gives users the opportunity to experience the interactions with factory workflows and visualize how they flow in VR. 

    The project resulted in two options that visualizes product flow and four options that visualizes workflow. Out of these six solutions, three were chosen and implemented to the project Fabriksvisualisering. These solutions are based on the construction of splines and include both alternatives for product flows and one alternative for workflows. The selection was based on functionality, user-friendliness and how realistic the outcome is. The result gives users the opportunity to experience the interactions with factory workflows and visualize how they flow in VR. 

    The conclusion is that there are several ways to visualize four out of seven factory workflows. The flows that are possible to visualize are material handling of raw materials, semi-finished and finished products, as well as the transportation and movements of workforce. This can be visualized with the help of AI, a robot system within UE, the construction of splines and Niagara systems connected to splines.

    Fulltekst (pdf)
    fulltext
  • 8.
    Björketun, David
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Eklund, Alexander
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Konceptframtagning av tether-spännare: Framtagning av koncept för spänningsanordning på en vinsch för offshore bruk2021Independent thesis Basic level (university diploma), 10,5 poäng / 16 hpOppgave
    Abstract [en]

    When working under water at great depths, or in tough environments, remotely controlled underwater vehicles, so called ROV:s, are a good tool too use. With the help of these robots it is possible to work for longer periods of time and at larger depths then with ordinary divers. Ocean Robotics is a company from Linköping, Sweden, that has over 40 years of experience with ROV:s. They produce several different models for different kind of jobs.

    The purpose of this project was to develop a concept of a device that keeps the tension constant on the tether that connects the ROV with the operator. The tension needs to be constant when the tether is being rolled in on and out from the winch. The work was executed on behalf of Ocean Robotics and a prerequisite was that it should be possible to integrate the device with the winch system they have today.

    The work have followed Ulrich and Eppingers method for product development and together with requirements from the contractor several concepts was generated. The concepts were validated in a decision matrix and the concepts with the highest score was modeled in the CAD-program CREO Parametrics. The concepts got further developed and was compared against each other once again. Which generated the final concept. Furthermore a couple of friction tests were executed to find appropriate materials for the construction.

    The final concept will be mounted on the winch and connected to Ocean Robotics self reversing screw. To measure the tension on the tether a load cell is used and the tether is fed by a rubberized wheel that is driven by an electric motor. To adjust the force around the tether a trapezoidal thread is driven by another electric motor, which adjust the pinch wheels height. The tether goes as a tangent between the two wheels that has a profile that insures that the force goes around the tether.  

    Fulltekst (pdf)
    fulltext
  • 9.
    Blixt, Wilma
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Schönning, Hilda
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Design Automation of Air Intake Lips on an Aircraft: How to implement design automation for air intake lips in a later design concept phase2023Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Air intakes are complex components that are critical for the propulsion of the aircraft. The design has to consider requirements from several different departments, often contradictory. Additionally, the air intakes need to cooperate with other critical components. This makes testing of the models crucial, hence time-demanding. Design automation is a growing field which aims at minimizing repetitive work during product concept development. To follow the increasing digitalization, further investigations of design automation applied on air intakes are significant. 

    The application Imagine and Shape in 3D Experience CATIA handles subdivided surfaces. These surfaces are both flexible and provide a high order of continuity, which is often desired. While design automation in CATIA is well investigated, design automation in Imagine and Shape is not. 

    Knowledge based engineering techniques are often used to implement design automation. The methodology MOKA is frequently used when developing knowledge based engineering applications. This master thesis has followed MOKA in combination with Scrum. 

    The master thesis has resulted in a method to allow automation in Imagine and Shape by linking mesh nodes on subdivided surfaces to reference points that are parameterized. Further, a method for generating air intake configurations as well as the integration with a fuselage has been developed. The method includes wireframe models in Generative Shape Design, subdivided surfaces in Imagine and Shape, scripts in EKL as well as UserForm and scripts in VBA. Additionally, the order of continuity for an integration between air intakes and fuselage has been analyzed using tools in 3D Experience CATIA. 

    A conclusion drawn is that the method for generating air intakes cannot be completely automated. Instantiation and dimension of components can be automated, but manual work is required when using tools in Imagine and Shape during the integration between the components and the fuselage.Two methods for linking mesh nodes to reference points have been identified, one manual and one semi-automatic. The automatic method saves time and mouse clicks by utilizing VBA scripts. Further, the achieved order of continuity of an integration between subdivided surfaces depends on the individual components.

    Fulltekst (pdf)
    fulltext
  • 10.
    Boztepe, Suzan
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Linde, Per
    Malmö University, Sweden.
    Smedberg, Alicia
    Malmö University, Sweden.
    Design making its way to the city hall: Tensions in design capacity building in the public sector2023Inngår i: IASDR 2023: Life-Changing Design / [ed] D. De Sainz Molestina, L. Galluzzo, F. Rizzo, D. Spallazzo, Milan, 2023Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Public sector organizations have been increasingly turning to design in their pursuit to innovate and address pressing challenges that seem intractable through their existing ways of working. Design’s presence in the public sector is still a relatively recent phenomenon ridden with many challenges. Through a study of three municipalities in Sweden, we present tensions designers face as they work their way to build design capacity. We argue that making a place for design in organizational systems and their ways of working requires skillfully navigating these tensions. We describe each tension in terms of their contradictions embedded in dualities and discuss designers’ ways of managing them. Practical applications for design and public administration are also discussed.

  • 11.
    Brånäs, Philip
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Enderby, Nora
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Automatic Creation of an Aircraft Structural Layout and Structural Analysis Model: A method for implementing design automation in an early conceptual design phase2022Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Aircraft structural layout concept design at Saab Aeronautics utilize thickness optimizationto evaluate astructural layout concept. The thickness values can be used to compare conceptsto each other,and the bestonecan be further developed. Today, most ofthe creation and evaluation of structural layout concepts is manual work. Therefore, there is an ongoing investigation on how to implement design automation to reduce this manual and repetitive work.

    The investigationaims to achieve rapid exploration of the design space to find a good base for a new aircraft development. This includes investigating how the synchronization between a structural layout model (SLM) and a global finite element model (GFEM) can be improved.

    This thesis contributes to the investigation by exploring the possibilities to implement design automation in the creation of the SLM regarding the fuselage structure. Further, exploring the implementation of design automation in the creation of the GFEM to enable automatic evaluation of concepts. The thesis also explores how the synchronization between the models can be improved.

    To structure the thesis work, the software development methodologies of MOKA and RAD weremodified and combined. The execution of the thesis was carried out in the software of 3DEXPERIENCE, particularly using the applications CATIAand SIMULIA.

    This thesis work resulted in a methodfor developing and evaluating aircraft structure concept designs with design automation. The new method includes two models with corresponding scripts. The first model developed is a tool for a conceptualdesignerthat enables the creation of aircraft fuselage SLM from user defined inputs. The second model is generated by script which results in a GFEM with a direct connection to the SLM.

    To conclude, the developed method enables a faster iteration work of fuselage structural concept designs compared to the current method. The detail level is lower but more consistent and uniform. The GFEM was not able to fulfil its purpose in the developed method due to time limits and software limitations. However, the synchronization between the SLM and GFEM was implemented successfully and contained all critical elements.

    Fulltekst (pdf)
    fulltext
  • 12.
    Danielsson, Sebastian
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Åström, Fredrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Enhancing the Swedish Defence: Development of a Modernized Hanguard for AK 4B Battle Rifle2023Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    This master thesis report describes the development process of a modernized handguard for the AK4B battle rifle, which is the main armament for the Swedish Home Guard. The project was carried out in cooperation with ALTEN Sweden AB. The goal of the project was to develop a new, competitive handguard design and to establish a complete design documentation as a foundation for production. This documentation consisted of a final material selection, process plan with suitable manufacturing methods and engineering drawings. The project was initiated with a problem definition to establish a thorough understanding of the product to be improved and enabling a determination of aspects that might be of importance to the product development. From this, research areas could be selected and studied to acquire necessary insights to complete the project goals. The product development process implemented is mainly inspired by Ulrich & Eppinger, and includes the stages concept development, detail design and testing & refinement. Thus, well-established methodology was implemented, ensuring credibility and a qualitative result. Throughout the stages ofthe product development process, a product specification was established, before generating concepts and selecting a final candidate which were refined based on the selection of materials and elaborated process plan. Finally, a verification of the requirements was concluded using several methods to prove the performance of the product. The results presents a developed product fulfilling established requirements and includes required documentation for production. Overall, the product is considered to have great potential for customer satisfaction, and to perform well in a final testing according to military standards.  

    Fulltekst (pdf)
    fulltext
  • 13. Bestill onlineKjøp publikasjonen >>
    Gustafsson, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Exploring Data-Driven Methods to Enhance Usability of Design Optimization2022Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Developing high-performing products at a low cost while keeping development time down is increasingly important in today’s competitive market. The current state presents a need for efficient product development processes. One of the challenges is knowledge often being limited in early stages where the cost of making changes is still relatively low. As the process progresses more knowledge is gained to better support decisions; however the cost of making changes increases, limiting the design freedom. To increase knowledge while retaining design freedom, several computer-based tools are available to both generate and evaluate designs in order to make iterations faster and more accurate.

    Design Optimization (DO) can be utilized to explore the design space and find optimal designs. A Computer-Aided Design (CAD) model is often required as input to analysis tools evaluating the designs. By utilizing Design Automation (DA) several tasks involved in creation and modification of CAD models can be automated. For this reason, DA is sometimes considered an enabler for DO although its use is far wider, covering several aspects of the design process mainly focusing on automating repetitive and routine tasks.

    Machine Learning and other data-driven methods are becoming increasingly viable in the context of DO and DA. This thesis explores the use of data-driven methods to enhance the usability of DO in different ways such as a faster process, new use-cases, or a more integrated and automated process.  

    Literature in the area is reviewed, identifying applications, trends and challenges. Furthermore, two support tools are developed, incorporating data-driven methods tied to an industrial case. The applications focus on parameterizing geometry and predicting design performance respectively. Potential benefits, limitations, and challenges are discussed based on the literature review and insights from the two support tools. The focus of the thesis is mainly on how data-driven methods can facilitate automation and integration in the design process, specifically for complex products requiring significant engineering efforts.  

    Delarbeid
    1. Comparison of Design Automation and Machine Learning algorithms for creation of easily modifiable splines
    Åpne denne publikasjonen i ny fane eller vindu >>Comparison of Design Automation and Machine Learning algorithms for creation of easily modifiable splines
    2020 (engelsk)Inngår i: Proceedings of NordDesign 2020, Lyngby, Denmark, 12th - 14th August 2020 / [ed] Mortensen, N.H.; Hansen, C.T. and Deininger, M., The Design Society, 2020Konferansepaper, Publicerat paper (Fagfellevurdert)
    Abstract [en]

    In order to enable easy modification of results from a design optimization process in a CAD tool, a flexible representation of the geometry is needed. This is not always trivial however, since many file formats are not importable as modifiable geometry into the CAD tool, and if they are, they might not represent the geometry in a way that enables easy modification. To mitigate this problem a design automation (DA) and a machine learning (ML) approach are developed and compared using a test case from an optimization process used to optimize hose routing in tight spaces. In the test case used, the geometry from the optimization process consists of center curves represented as a large number of points. To enable easy modification a more flexible representation is needed such as a spline with a few well-placed control points. Both the DA and ML approach can approximate center curves from the optimization process as splines containing a varying number of control points but do show different properties. The DA approach is considerably slower than the ML but adds a lot of flexibility regarding accuracy and the number of control points used.

    sted, utgiver, år, opplag, sider
    The Design Society, 2020
    Serie
    DS ; 101
    Emneord
    Design Automation, Machine Learning, Computer aided Design, Optimization
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-184173 (URN)10.35199/NORDDESIGN2020.55 (DOI)9781912254088 (ISBN)
    Konferanse
    NordDesign
    Tilgjengelig fra: 2022-04-06 Laget: 2022-04-06 Sist oppdatert: 2022-04-07
    2. Combinatorial Optimization of Pre-Formed Hose Assemblies
    Åpne denne publikasjonen i ny fane eller vindu >>Combinatorial Optimization of Pre-Formed Hose Assemblies
    2021 (engelsk)Inngår i: Proceedings of the ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC-CIE2021): Volume 3B: 47th Design Automation Conference (DAC), The American Society of Mechanical Engineers , 2021, artikkel-id V03BT03A033Konferansepaper, Publicerat paper (Fagfellevurdert)
    Abstract [en]

    Cable and hose routing is a complex and time-consuming process that often involves several conflicting objectives. Complexity increases further when routes of multiple components are to be considered through the same space. Extensive work has been done in the area of automatic routing where few proposals optimize multiple hoses together. This paper proposes a framework for the routing of multiple pre-formed hoses in an assembly using a unique permutation process where several alternatives for each hose are generated. A combinatorial optimization process is then used to find Pareto-optimal solutions for the multi-route assembly. This is coupled with a scoring model that predicts the overall fitness of a solution based on designs previously scored by the engineer as well as an evaluation system where the engineer can score new designs found through the use of the framework to update the scoring model. The framework is evaluated using a testcase from a car manufacturer showing a severalfold time reduction compared to a strictly manual process. Considering the time savings, the proposed framework has the potential to greatly reduce the overall routing processes of hoses and cables.

    sted, utgiver, år, opplag, sider
    The American Society of Mechanical Engineers, 2021
    Emneord
    multiobjective optimization, design automation, hose routing, path planning Topics:Optimization, Cables, Engineers, Manufacturing, Design automation, Pareto optimization, Path planning
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-184180 (URN)10.1115/DETC2021-71408 (DOI)978-0-7918-8539-0 (ISBN)
    Konferanse
    ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference August 17-19, 2021, Virtual, Online
    Merknad

    Funding agencies: This work has been financed by Vinnova and by governmentand industry cooperation on vehicles of the future, within the research project AUTOPACK 2017-03065

    Tilgjengelig fra: 2022-04-06 Laget: 2022-04-06 Sist oppdatert: 2022-04-07
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  • 14.
    Gustafsson, Erik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Persson, Johan
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Tarkian, Mehdi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Combinatorial Optimization of Pre-Formed Hose Assemblies2021Inngår i: Proceedings of the ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC-CIE2021): Volume 3B: 47th Design Automation Conference (DAC), The American Society of Mechanical Engineers , 2021, artikkel-id V03BT03A033Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Cable and hose routing is a complex and time-consuming process that often involves several conflicting objectives. Complexity increases further when routes of multiple components are to be considered through the same space. Extensive work has been done in the area of automatic routing where few proposals optimize multiple hoses together. This paper proposes a framework for the routing of multiple pre-formed hoses in an assembly using a unique permutation process where several alternatives for each hose are generated. A combinatorial optimization process is then used to find Pareto-optimal solutions for the multi-route assembly. This is coupled with a scoring model that predicts the overall fitness of a solution based on designs previously scored by the engineer as well as an evaluation system where the engineer can score new designs found through the use of the framework to update the scoring model. The framework is evaluated using a testcase from a car manufacturer showing a severalfold time reduction compared to a strictly manual process. Considering the time savings, the proposed framework has the potential to greatly reduce the overall routing processes of hoses and cables.

  • 15.
    Gustafsson, Erik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Persson, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Ölvander, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Comparison of Design Automation and Machine Learning algorithms for creation of easily modifiable splines2020Inngår i: Proceedings of NordDesign 2020, Lyngby, Denmark, 12th - 14th August 2020 / [ed] Mortensen, N.H.; Hansen, C.T. and Deininger, M., The Design Society, 2020Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In order to enable easy modification of results from a design optimization process in a CAD tool, a flexible representation of the geometry is needed. This is not always trivial however, since many file formats are not importable as modifiable geometry into the CAD tool, and if they are, they might not represent the geometry in a way that enables easy modification. To mitigate this problem a design automation (DA) and a machine learning (ML) approach are developed and compared using a test case from an optimization process used to optimize hose routing in tight spaces. In the test case used, the geometry from the optimization process consists of center curves represented as a large number of points. To enable easy modification a more flexible representation is needed such as a spline with a few well-placed control points. Both the DA and ML approach can approximate center curves from the optimization process as splines containing a varying number of control points but do show different properties. The DA approach is considerably slower than the ML but adds a lot of flexibility regarding accuracy and the number of control points used.

  • 16.
    Henriksson, Fredrik
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Ending up at the beginning – teaching material driven design to engineering students2022Inngår i: Proceedings of the 24th International Conference on Engineering and Product Design Education / [ed] Bohemia, Erik; Buck, Lyndon; Grierson, Hilary, 2022Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Material Driven Design, or MDD, is a new way of realizing products starting in the understanding ofthe material rather than the need-driven approach that can be used to describe classic productdevelopment methodology. While new, MDD has potential to encourage more sustainable productsbeing developed and is a useful tool for new designers and engineers to learn. In this paper, the authorpresents some lessons learned from teaching MDD to students in design and product development at aSwedish university. These students have experience from design and product development projects buthave not done material-driven projects before. In general, the author concludes that the students areremarkably well-prepared in terms of tools and knowledge to do MDD, but that course coordination canmake the projects less efficient if this is not solved early on. In master thesis projects or courses withfew in-process deliverables, the implementation seems easier and can give students another path to solveproblems in industry.

    Fulltekst (pdf)
    fulltext
  • 17.
    Henriksson, Fredrik
    et al.
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Jonsson, Marie
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Repurposing and production – So what’s the issue? Reflecting on how the production system can be affected by new circular material flows2023Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    On the path towards a circular economy, new ways of making and producing must be implemented on an industrial level. While there are methods for remanufacturing, the topic of repurposing on an industrial scale is still not fully explored and systematized. Repurposing, in this paper defined as the process of re-using products or components but with other functions, or modifying products or components for use in other products, will have a distinct effect on the production system and will challenge the current idea of production system development. In this paper, the authors use four different cases (three implemented in industry, one current design project in an academic-industrial partnership) to reflect on how the production system will be affected by certain aspects of repurposing. In total, five topics of production system development (Material classification, Product definition, Logistics & material handling, Manufacturing processes & planning and Processing window) are highlighted in the analysis, and some concluding remarks about flexibility needs and integrated development processes are presented. This paper does not provide clear answers or methods on how to implement repurposing but highlights multiple areas where further research is needed in order to make repurposing easily accessible and possible to implement for small and medium-sized manufacturers in their regular, daily work.

  • 18.
    Hjertstedt Otterström, Oliver
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Package Concept for High Variation Products to Improve Production: Package Development and Implementation to Improve Production of Heavy and High Variation Products2023Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Within the Master’s program in mechanical engineering at Linköping University, this thesis project unfolds in collaboration with Metso Sweden, specifically at their Sala factory. Focused on addressing challenges in packaging processes for Metso’s VASA-line slurry pumps, the project endeavors to devise a concept that not only meets global shipping requirements but also enhances factory output.

    The research unfolds with an exploration of the background, emphasizing the complexities of manufacturing large-scale pumps for heavy-duty industries. Operating in 45 countries with a workforce of approximately 16,000 employees, Metso’s site in Sala specializes in pump production, particularly for the mining industry. The unique nature of slurry pumps, designed to handle liquid solutions containing solid particles, necessitates a tailored approach to packaging.

    The identified problem lies in the high variation of pump configurations, demanding flexibility in production and packaging. Currently, custom-made packages are crafted by experienced operators, who are lacking feedback on their performance. The packaging process involves standard pallets or custom-made packages, with the latter lacking standardization and documentation, introducing uncertainties in transport.

    This study aims to improve overall efficiency at Metso by addressing bottlenecks and knowledge gaps in packaging, focusing on the VASA-line slurry pumps. The goal is to present a concept that aligns with global shipping requirements and has the potential to significantly increase factory output. The findings, supported by production analysis and a detailed implementation plan, estimating a 3.38-fold increase in current production capacity.

    The thesis utilizes production analysis methods in supporting product development and optimizing packaging processes. It further highlights the influence of global shipping requirements on production dynamics, necessitating additional steps in package assembly. With a focus on time rather than costs, this thesis positions itself as a practical guide for enhancing production efficiency within a constrained time frame.

    In summary, this thesis unfolds as an exploration of packaging challenges, offering tangible insights for product development in a production setting and package development, especially in the context of global shipping.

    Fulltekst (pdf)
    fulltext
  • 19.
    Hochwallner, Martin
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten. School of Engineering, Jönköping University, Sweden.
    Automation in Remanufacturing: Applying Sealant on a Car Component2022Inngår i: Advances in Transdisciplinary Engineering, Volume 21 / [ed] Amos H.C. Ng, Anna Syberfeldt, Dan Högberg, Magnus Holm, Amsterdam, The Netherlands: IOS Press, 2022, Vol. 21, s. 147-158Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The remanufacturing industry currently relies significantly on manualwork when, for example, sorting and disassembling. Due to several issues, includingprocess time and sequence, operations number, disassembly planning andscheduling, process cost, and performance measurement, it is challenging to staycompetitive. Based on this, it is assumed that more extensive use of robots andautomation in these industries can facilitate higher efficiency and better workconditions. This research paper aims to explore how remanufacturing of carcomponents can be made automatic. The paper describes a case where a specific carcomponent was selected and a specific step in its remanufacturing process exploredfrom the perspective of automating that task. When conducting remanufacturing ofthe selected car component, some machines are used for the testing, cleaning, andgrinding of materials. However, all assembly work is done manually. Incollaboration with the case company, the process step of applying sealant for theassembling of a lid that covers electronic components was selected. Thedemonstrator shows that it is possible to apply sealant with a human-robot layoutwith a good result. One of the advantages of using a robot for this step is that a highquality result was achieved. 

  • 20.
    Jiménez Romanillos, Elena
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Williams, Helen
    Karlstad Univ, Sweden.
    Wever, Renee
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Unpacking Behaviours: A Literature Study and Research Agenda on Consumer Behaviour in Packaging-Free Systems2024Inngår i: Packaging technology & science, ISSN 0894-3214, E-ISSN 1099-1522Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    In an era where food packaging plays a dual role in both reducing food waste and contributing to global packaging waste, this study presents an analysis of packaging-free systems. As governments and organizations attempt to address the environmental impact of single-use packaging, packaging-free alternatives have emerged as a promising solution. However, there is a need for a comprehensive assessment of environmental sustainability and its alignment with consumer behaviours and preferences in this growing type of grocery system. Considering this need, this study employs an integrative literature review process, selecting 51 research articles. This selection was classified into three principal areas: the characteristics of packaging-free services, the dynamics of consumer behaviour and patterns from a household perspective. This review evaluates the effectiveness of packaging-free systems, exploring the factors that drive consumer adoption, the obstacles to transitioning and the relevance of theoretical frameworks like the theory of planned behaviour (TPB) and practice theory (PT) in understanding and assessing the sustainability of these alternatives. The result of this study is the identification of significant research gaps and opportunities, leading to a comprehensive research agenda. This agenda emphasizes the need for a more refined understanding of consumer classifications that extend beyond standard demographic metrics, delving into aspects like household structures, dietary preferences and regional variations. The study highlights the limited scope of existing literature by advocating for a holistic grocery analysis that blends packaging-free and conventional shopping practices to understand more realistic grocery scenarios, as not all products are available in packaging-free alternatives. It also underscores the importance of integrating environmental assessments with consumer behaviour studies to see the sustainability of the systems beyond reusable containers. Additionally, this research sheds light on the relatively unexplored area of online packaging-free services, questioning the sustainable implication of incorporating online alternatives in grocery practices, and suggests a broader application of theoretical frameworks, including activity theory (AT) as a new perspective to achieve a new understanding of these systems. Lastly, contributing to the overall understanding of packaging-free systems, the study concludes with a SWOT analysis that briefly identifies strengths in environmental sustainability and consumer awareness, balanced against weaknesses like data gaps and complex consumer decision-making processes.

  • 21.
    Joardder, Mohammad U. H.
    et al.
    Queensland Univ Technol, Australia; Rajshahi Univ Engn & Technol, Bangladesh.
    Bosunia, Md. Hridoy
    Rajshahi Univ Engn & Technol, Bangladesh.
    Hasan, Md Mahmudul
    Rajshahi Univ Engn & Technol, Bangladesh.
    Ananno, Anan Ashrabi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Karim, Azharul
    Rajshahi Univ Engn & Technol, Bangladesh.
    Significance of Glass Transition Temperature of Food Material in Selecting Drying Condition: An In-Depth Analysis2023Inngår i: Food reviews international (Print), ISSN 8755-9129, E-ISSN 1525-6103Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    Drying is a complicated phenomenon involving a combination of transport, deformation, and chemical kinetics. It is an energy intensive lengthy process and results in deterioration of food quality. The glass transition temperature (GTT) significantly affects the internal mass transfer mechanism and hence significantly affects the drying kinetics. Moreover, the rheological and transport characteristics of food materials are remarkably impacted by GTT, which has an influence on the energy consumption and quality of food products during drying. Similarly, molecular weight and drying conditions also affect the GTT. This comprehensive review uncovers the fundamental understanding of GTT and demonstrates its crucial relationship with physio-structural and transport properties of food items. It has been demonstrated that a clear understanding of the glass transition temperature may help in determining appropriate drying conditions while ensuring great food quality.

  • 22.
    Johansen, Kerstin
    et al.
    School of Engineering, Jönköping University, Jönköping, Sweden.
    Jonsson, Marie
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Mattsson, Sandra
    RISE Research Institutes of Sweden, Mölndal, Sweden.
    Circularity Impact on Automotive Assembly – What Do We Know?2023Inngår i: IFIP Advances in Information and Communication Technology / [ed] Alfnes, E., Romsdal, A., Strandhagen, J.O., von Cieminski, G., Romero, D., Springer, 2023, Vol. 692Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Assembly is crucial in the automotive industry, and regulations aimed to increase circularity impact the production systems. From this perspective different strategies are emerging related to sustainability and to the End-of-life Vehicles directive, perspectives often captured by “R-words” like Reuse, Recycle, Rethink etc. This paper is based on a literature search inspired by different R-words related to circularity and assembly in the automotive industry in combination with industrial workshops on the same theme. The results explore what challenges to manage during the ongoing green transition in the context of assembly in automotive. Recover, Repair, Reuse and Recycle are the most common terms found in the literature. Furthermore, Remanufacturing stands out as of particular interest to the automotive industry. However, based on the industrial workshops, Rethink as a collective word is an important perspective as well. The conclusions indicate that digitalization can be an enabler but also that there is a need for developing a common understanding about definitions and utilization of engineering tools supporting circularity.

  • 23.
    Jonsson, Wilhelm
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Lundblad, Fredrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Utveckling av infästning mellan jordbearbetningsmaskin och monterbar såmaskin: Implementering av den monterbara såmaskinen BioDrill 500 på tallrikskultivatorn Carrier XL2023Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Under våren 2023 utfördes detta examensarbete på Väderstad AB, ett företag som tillverkar högpresterande jordbruksmaskiner, däribland såmaskiner, precisionssåmaskiner och jordbearbetningsmaskiner. En av dessa är tallrikskultivatorn Carrier XL, vilken kan utrustas med den monterbara såmaskinen BioDrill 360 för att kunna så frön samtidigt som jorden bearbetas. På senare tid har det uppstått ett behov att även kunna montera en större sålåda, BioDrill 500, på Carrier XL. Målet med detta arbete blev därför att ta fram ett konstruktionsförslag på hur BioDrill 500 kan implementeras på Carrier XL 425-725, med hänsyn till Väderstads produktion, fungerande frötransport, utrymmeskrav samt krav på hållfasthet.

    Arbetet har bestått av teoriundersökning, konceptgenerering och utveckling i flera iterationer samt CAD-modellering i Creo. Dimensionerande beräkningar har utförts i form av FEM-analyser och andra hållfasthetsberäkningar på maskinens drag och hjulaxel. Dessutom har en undersökning av produktarkitektur utförts för att se till vilken grad modularitet och funktionsdelning kan implementeras på infästningen för att göra den fördelaktig ur ett tekniskt och ekonomisk perspektiv. 

    Arbetets resultat består av en ställning som monteras på hjulstället till Carrier XL som gör att toppen av sålådan konstant hålls parallell med marken tack vare ett parallellänkage. En plattform utvecklas och placeras vid sidan av BioDrill 500 för att tillgodose tillgänglighet för användaren och två fördelarhuvuden monteras i parallellänkaget framför BioDrill 500 för att möjliggöra en fungerande frötransport. Produktariktekturen anpassas genom att implementera en kombination av modulära och integrerade lösningar samt funktionsdelning. För att passa i produktionen på Väderstad används mestadels plåtar och rör av stål som främst bearbetas genom laserskärning och bockning samt mindre inslag av svets. Dessutom anpassas infästningen med hjälp av Design for Manufacturing och Design for Assembly för att underlätta tillverkning och montering. 

    Fulltekst (pdf)
    fulltext
  • 24.
    Josefsson, Louise
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Exploring the Possibilities of Graphene Textiles: A Material-Driven Design Project to Develop Suitable Applications for Graphene Coated Textiles2021Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Graphene is a two-dimensional carbon based material with unique properties, such as electrical and thermal conductivity. When a textile is coated with graphene, it becomes conductive, while remaining low weight, soft, breathable, flexible, and stretchable. The purpose of this thesis is to investigate what products are suitable to be made with graphene textiles, by using the method Material Driven Design (MDD). Reflections are also made to determine how this method is affected by being applied to a two-dimensional material. To help with this, three kinds of graphene textiles from the company Grafren AB are investigated; conductive textiles, heatable textiles, and textile sensors. The product goal is to develop a portfolio containing 5-8 conceptual products based on these graphene textiles.

    The process includes conducting an investigation of the technical properties of the material, a user study, and a benchmarking study. This is done to understand the limitations and opportunities of the material, how it is perceived, and what similar materials there are on the market. After that, the material's characteristics are reflected upon to establish a vision for how it should be used in future applications. Then, to follow that vision, a user study is conducted to investigate how people perceive different materials and products, in order to create design guidelines to ensure that the material and product are perceived as intended. Next, concepts are developed according to the previously determined guidelines. To achieve this, idea generating workshops are conducted, where 14 concepts are selected for further development. The portfolio is then created, meant to inspire further usage of the material. It contains the following seven concepts.

    1. A heatable textile meant for cooking on camping trips.
    2. A fabric containing sensors that can notify when it is damaged.
    3. A keyboard made of fabric, for an easy and comfortable use and transportation.
    4. A stroller with sensors and heaters, for a more comfortable and safe user experience.
    5. A conductive jacket that can electrocute mosquitoes that come in contact with it.
    6. Pressure sensors in a carpet that can keep track of the people inside and provide assistance in emergencies.
    7. Gloves with sensors in them that can translate sign language live to text or speech.

    Since MDD heavily focuses on the sensorial qualities and physical characteristics of the material, the method needs to be adapted to become useful when working with such a versatile two-dimensional material. Fortunately, most adaptations can be made fairly easily. The timing of each step should also be considered, to ensure that the vision and guidelines can be made specific enough to be useful.

    Fulltekst (pdf)
    Exploring the Possibilities of Graphene Textiles
  • 25.
    Kai, Mahim
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Arumugam, Balagangadar Thilakar
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Development of CAD Models for Large Silencer Platforms Using Design Automation2023Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Scania is known as a front-runner in the development of power trains for heavy vehicles, marine, and general industrial applications. As the regulations on emissions for combustion engine vehicles are getting tougher with increasing awareness on sustainable solutions and reducing environmental impact, the goal at Scania is to develop combustion engines to achieve low-pollutant emissions whilst achieving higher efficiency. Consequently, the exhaust after-treatment systems must continuously evolve to meet changing legislative requirements and customer demands.  To achieve this goal in this competitive market, Scania must adapt to these changes within a short period of time.

    The purpose of this thesis is to explore and improve the existing development process for the exhaust after-treatment system particularly for Large silencer platform by introducing design automation intended for computational fluid dynamics simulations. The objective was to introduce a method to reduce development time and allow designers to generate CFD models as effectively as possible.

    Two new methods were developed and proposed to create geometries intended for CFD simulation. The first method focuses on the extraction and splitting of internal volume/fluid region and these models will be utilized in the simulation solvers to perform CFD simulation. The second method was to standardize the naming of extracted surfaces specific to CFD simulation since every surface is treated differently in the simulation solvers. A simple user-friendly graphical user interface was created for easy operation and faster adaptability.

    Finally, the developed methods were evaluated and it was shown that it has the potential to save a significant amount of time during the pre-processing of the development phase and thus allow the engineers to focus on other value-adding and important task.

    Fulltekst (pdf)
    Master_Thesis_Report_Scania
  • 26.
    Karlsson, Simon
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Marklund, Isabella
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Redesign for Carbon Fiber: A feasibility study on composites in forestry harvesting heads2021Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Harvesting heads are an essential part of today’s forestry industry, enabling a high rate of tree felling from a single operator. Requirements for the forestry machine they are attached to are strongly linked to the weight of the harvesting head, providing an incentive to make the heads as light as possible. This can be done in various ways, of which one is switching the material to one that is lighter.This thesis examined the feasibility of producing the frame of a harvesting head in carbon fiber reinforced polymer. This was done through a redesign approach in several phases. The design and requirements of the existing harvesting head were detailed, the strengths and weaknesses of the material were studied, and topology optimization was utilized as a tool for better understanding the load paths and possible material placement. Concepts aimed at enabling production and use of the new frame while keeping features necessary for component attachment and function was then generated.The results showed a frame made largely from carbon fiber reinforced polymer, but with elements of steel, and with a total weight reduction of 45% compared to the original design. The conclusions of the thesis, within the established delimitations, is that a frame from this material is possible but complex to produce.

    Fulltekst (pdf)
    fulltext
  • 27.
    Larsson, Linnéa
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Ståhlbrand, Moa
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Development of a framework for the design of expanded metal facades: Using artificial intelligence to streamline pre-production work2022Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The field of design automation aims to automate repetitive tasks in a workflow in order to free up time for more productive work. In this thesis, design automation with the help of AI techniques is investigated to streamline the pre-production work of expanded metal facades. 

    Two different problems concerning pre-production work are investigated in this thesis. The first one focuses on how to translate architectural drawings in pdf format to a bill of material. The second problem aims to develop a non-linear method for calculating the free area of the expanded metal facades.

    The method used for this project is an adaptation of the product development process with the inspiration of knowledge-based engineering. 

    For the first project, the AI method template matching was successfully used. With a script using this method, most of the panels are identified, except for panels where the drawings do not provide clear lines or where lines around the panels do not exist. The line quality in the architectural drawings was shown to impact the size estimation of the panels.

    In the second project, a non-linear machine learning model was developed. However, it was not managed within this project to get a good enough accuracy. The main reason for this is that it is suspected that the data is not accurate enough, nor are the 78 data points enough to train the model.

    Fulltekst (pdf)
    fulltext
  • 28.
    Lithman, Harald
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Nilsson, Anders
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Introducing Generative Artificial Intelligence in Tech Organizations: Developing and Evaluating a Proof of Concept for Data Management powered by a Retrieval Augmented Generation Model in a Large Language Model for Small and Medium-sized Enterprises in Tech2024Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    In recent years, generative AI has made significant strides, likely leaving an irreversible mark on contemporary society. The launch of OpenAI's ChatGPT 3.5 in 2022 manifested the greatness of the innovative technology, highlighting its performance and accessibility. This has led to a demand for implementation solutions across various industries and companies eager to leverage these new opportunities generative AI brings. This thesis explores the common operational challenges faced by a small-scale Tech Enterprise and, with these challenges identified, examines the opportunities that contemporary generative AI solutions may offer. Furthermore, the thesis investigates what type of generative technology is suitable for adoption and how it can be implemented responsibly and sustainably. The authors approach this topic through 14 interviews involving several AI researchers and the employees and executives of a small-scale Tech Enterprise, which served as a case company, combined with a literature review. 

    The information was processed using multiple inductive thematic analyses to establish a solid foundation for the investigation, which led to the development of a Proof of Concept. The findings and conclusions of the authors emphasize the high relevance of having a clear purpose for the implementation of generative technology. Moreover, the authors predict that a sustainable and responsible implementation can create the conditions necessary for the specified small-scale company to grow. 

    When the authors investigated potential operational challenges at the case company it was made clear that the most significant issue arose from unstructured and partially absent documentation. The conclusion reached by the authors is that a data management system powered by a Retrieval model in a LLM presents a potential path forward for significant value creation, as this solution enables data retrieval functionality from unstructured project data and also mitigates a major inherent issue with the technology, namely, hallucinations. Furthermore, in terms of implementation circumstances, both empirical and theoretical findings suggest that responsible use of generative technology requires training; hence, the authors have developed an educational framework named "KLART". 

    Moving forward, the authors describe that sustainable implementation necessitates transparent systems, as this increases understanding, which in turn affects trust and secure use. The findings also indicate that sustainability is strongly linked to the user-friendliness of the AI service, leading the authors to emphasize the importance of HCD while developing and maintaining AI services. Finally, the authors argue for the value of automation, as it allows for continuous data and system updates that potentially can reduce maintenance. 

    In summary, this thesis aims to contribute to an understanding of how small-scale Tech Enterprises can implement generative AI technology sustainably to enhance their competitive edge through innovation and data-driven decision-making. 

    Fulltekst (pdf)
    fulltext
  • 29.
    Lundvik, Axel
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Effektivisering av produktframtagningen för kundanpassade hydraulcylindrar genom användning av automationsramverk2023Independent thesis Advanced level (degree of Master (Two Years)), 28 hpOppgave
    Abstract [sv]

    Examensarbetet som detaljeras i denna rapport är utfört på uppdrag av företaget Xperdi AB, designautomationsexperter vars önskemål med projektet var en demonstration av effekten avdesignautomation. Projektförslaget innefattar utveckling och användningen av ett automationsramverk för automatisk generering av unika hydraulcylindermodeller efter specifika designkrav. För att genomföra arbetet har olika verktyg och metoder kombinerats. Modellens delkomponenter konstruerades i CAD-programmet SolidWorks och kompletterades med nödvändiga data för att förbereda CAD-filerna för konfiguration. XCC (Xperdi CAD Configurator) är ett konfigurationsverktyg som hanterar datan från CAD och erbjuder extern styrning och konfiguration av CAD-modellen. För att automatisera konfigurationen som möjliggörs av XCC har ett gränssnitt för designval och olika verkställande operationer skapats i programmet Visual Studio, med tillhörande kod skriven i det objektorienterade språket Visual Basic. Koden i Visual Studio kommunicerar med XCC och innehåller konfigurativa instruktioner för modellen baserat på valda inputs, men även direkt med SolidWorks för verkställandet av specifika SolidWorks-funktioner. Projektet har resulterat i en anpassningsbar hydraulcylindermodell vars specifikationer styrs från gränssnittet, med funktionalitet för automatisk generering av hålbilder och ritningar för samtliga unika konfigurationer i designrymden. Även tidsvinsterna av designautomation har undersökts. Resultaten indikerar att arbetet med att upprätta ett automationsramverk har betydande fördelar, dels med avseende på hastigheten av designändringar som uppmätts, dels med avseende på mervärdet som tillkommer vid reduktion av repetitivt arbete. Dock tas i beaktning att fördelarna av designautomation bör vägas mot resursinvesteringarna som krävs.

    Fulltekst (pdf)
    fulltext
  • 30.
    Masud, Mahadi Hasan
    et al.
    RMIT Univ, Australia; Rajshahi Univ Engn & Technol, Bangladesh.
    Joardder, Mohammad U. H.
    Rajshahi Univ Engn & Technol, Bangladesh.
    Ananno, Anan Ashrabi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Nasif, Shayban
    Japan Policy Support Grp, Japan.
    Feasibility study and optimization of solar-assisted intermittent microwave-convective drying condition for potato2022Inngår i: European Food Research and Technology, ISSN 1438-2377, E-ISSN 1438-2385, Vol. 248, s. 1335-1349Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Intermittent microwave-convective drying (IMCD) is an advanced drying technology that overcomes the shortcomings of microwave, convective, and microwave-convective drying. Research on the feasibility study of solar-assisted IMCD along with investigating its microstructure change, nutritional analysis, and appearance of dried food materials is inadequate. This research aims to investigate the effects of microwave intermittency-on quality attributes and structural changes of potato slices. In addition, optimization of pulse ratio has been performed in this study. Drying experiments, namely convective drying (CD) and IMCD, were conducted to assess the quality of dried potato slices. It was found that IMCD took only 12 min to complete the drying process, whereas CD took approximately 300 min. The optical (colour) and nutritional (vitamin C) properties of the IMCD dried potato slices appeared better than those of hot air-dried samples. The overall techno-economic analysis indicates that the proposed solar-assisted IMCD can dry an equal amount of potato while consuming one-tenth of the required energy of CD. Therefore, successful industrial application of the proposed drying system might be a stepping stone in the way to the advancement of energy-efficient food drying systems.

  • 31.
    Moreno Atienza, Troy
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Keskitalo, Jesper
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Product development of a handguard: For AK4 weapon system/Heckler & Koch G32023Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The AK4 rifle serves as the primary weapon for the Home Guard, an integral part of the Swedish Armed Forces. Introduced in 1964, the AK4 is the Swedish version of the Heckler & Koch G3 and functions as a fully automatic assault rifle. Among its components, the handguard holds significant importance, providing stability, improving accuracy and control, and protecting the user from heat generated by the barrel. Recognizing the need for optimization, an employee from the ALTEN Group, possessing military experience and expertise in the AK4, launched a project to enhance the ergonomics and versatility of the handguard in a cost-effective manner. This initiative stems from the excessively high cost of commercially available handguards, making them financially unviable for replacing the original handguard of every AK4 used by the Home Guard personnel.

    This project aims to design and develop a next-generation handguard for the AK4 rifle that addresses the current limitations of the existing handguard. The primary focus is improving the shooter’s performance by establishing a comfortable shape of the handguard, reducing the weight, and enhancing its compatibility with accessories. Additionally, the aim is to ensure the handguard is cost-effective for mass production and meets the requirements set by the Swedish Defense Materiel Administration. To achieve the aims, interviews and a comprehensive user testing study was conducted, collecting quantitative data in the form of participant ratings and rankings for different design concept while also gathering qualitative data through participant feedback that highlighted specific design features contributing to comfort. Additionally, a systematic material selection process was performed, involving the analysis and ranking of various materials based on properties such as weight, price, and specific mechanical properties. Furthermore, the manufacturing analysis relied mainly on conversations with industry experts possessing expertise in the field of plastic manufacturing.

    Upon conducting a detailed analysis, it has been determined that the ideal configuration for the final product is an octagonal shape. After careful evaluation, Polyamide 6 reinforced with 30% glass fibers has emerged as the most suitable material choice for the handguard. This material had the optimal balance between mechanical properties, thermal performance, durability, cost-effectiveness, and environmental impact. To produce 50,000 handguard units, the recommended manufacturing method was injection molding due to its compatibility with mass production and the advice received from industry experts. Considering the design and selected material, a substantial number of the requirements outlined by FMV could be fulfilled by conducting both theoretical analyses and practical experiments.

    Fulltekst (pdf)
    Product development of a handguard
  • 32. Bestill onlineKjøp publikasjonen >>
    Nambiar, Sanjay
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Adaptive Automation for Customized Products2024Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    In today’s fast-paced industrial landscape, the drive for greater efficiency and flexibility in product development has sparked significant interest in innovative automation technologies. This thesis explores the usefulness of various automation techniques for customized products such as Knowledge-Based Engineering (KBE), Multidisciplinary Optimization (MDO) and machine learning frameworks.

    The research begins by establishing an automated framework for fixture design, combining design automation and MDO to streamline the design process. It then moves to optimizing gas turbines, introducing an automation framework that merges CAD templates with KBE principles.

    For complex and unstructured production, this thesis explores the use of Reinforcement Learning (RL) to tackle challenges in unstructured manufacturing. By utilizing lightweight physics-based engines and RL, the research advances automated assembly validation and mobile robot operations, pushing the boundaries of adaptive production automation. Furthermore, a framework is developed, which integrates smoothly with industrial robotic platforms showcases practical automation solutions and highlights the adaptability and applicability of digital twin technology in real-world situations.

    This thesis contributes to the field of product development by providing innovative solutions that are rooted in multidisciplinary research. It bridges the theoretical and practical aspects of automation with solutions that overcomes the obstacles to realize seamless integration between digital and physical realities in a manufacturing context.

    Delarbeid
    1. Multidisciplinary Automation in Design of Turbine Vane Cooling Channels
    Åpne denne publikasjonen i ny fane eller vindu >>Multidisciplinary Automation in Design of Turbine Vane Cooling Channels
    Vise andre…
    2024 (engelsk)Inngår i: International Journal of Turbomachinery, Propulsion and Power, ISSN 2504-186X, Vol. 9, nr 1, artikkel-id 7Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    In the quest to enhance the efficiency of gas turbines, there is a growing demand for innovative solutions to optimize high-pressure turbine blade cooling. However, the traditional methods for achieving this optimization are known for their complexity and time-consuming nature. We present an automation framework to streamline the design, meshing, and structural analysis of cooling channels, achieving design automation at both the morphological and topological levels. This framework offers a comprehensive approach for evaluating turbine blade lifetime and enabling multidisciplinary design analyses, emphasizing flexibility in turbine cooling design through high-level CAD templates and knowledge-based engineering. The streamlined automation process, supported by a knowledge base, ensures continuity in both the mesh and structural simulation automations, contributing significantly to advancements in gas turbine technology.

    sted, utgiver, år, opplag, sider
    MDPI, 2024
    Emneord
    multidisciplinary automation, design automation, mesh automation, knowledge-based engineering, turbine vane cooling design
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-201145 (URN)10.3390/ijtpp9010007 (DOI)001192494000001 ()
    Forskningsfinansiär
    Vinnova, 2020-04251
    Merknad

    Funding: VINNOVA

    Tilgjengelig fra: 2024-02-23 Laget: 2024-02-23 Sist oppdatert: 2024-05-21bibliografisk kontrollert
    2. Autofix – Automated Design of Fixtures
    Åpne denne publikasjonen i ny fane eller vindu >>Autofix – Automated Design of Fixtures
    Vise andre…
    2022 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert)
    Abstract [en]

    This paper presents a framework to develop the automated design of fixtures using the combination ofdesign automation (DA), multidisciplinary optimization and robotic simulation. MDO necessitates the useof concurrent and parametric designs which are created by DA and knowledge-based engineering tools. Thisapproach is designed to decrease the time and cost of the fixture design process by increasing the degree ofautomation. AutoFix provides methods and tools for automatically optimizing resource-intensive fixturedesign utilizing digital tools from different disciplines.

    sted, utgiver, år, opplag, sider
    Cambridge University Press, 2022
    Emneord
    design automation, design optimisation, knowledge-based engineering (KBE), fixtures, robotic simulation
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-195445 (URN)10.1017/pds.2022.56 (DOI)2-s2.0-85131360012 (Scopus ID)
    Konferanse
    International Design Conference - Design 2022, 23 - 26 May, 2022
    Tilgjengelig fra: 2023-06-20 Laget: 2023-06-20 Sist oppdatert: 2024-05-21bibliografisk kontrollert
    3. Automation of unstructured production environment by applying reinforcement learning
    Åpne denne publikasjonen i ny fane eller vindu >>Automation of unstructured production environment by applying reinforcement learning
    2023 (engelsk)Inngår i: Frontiers in Manufacturing Technology, E-ISSN 2813-0359, Vol. 3Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    Implementation of Machine Learning (ML) to improve product and production development processes poses a significant opportunity for manufacturing industries. ML has the capability to calibrate models with considerable adaptability and high accuracy. This capability is specifically promising for applications where classical production automation is too expensive, e.g., for mass customization cases where the production environment is uncertain and unstructured. To cope with the diversity in production systems and working environments, Reinforcement Learning (RL) in combination with lightweight game engines can be used from initial stages of a product and production development process. However, there are multiple challenges such as collecting observations in a virtual environment which can interact similar to a physical environment. This project focuses on setting up RL methodologies to perform path-finding and collision detection in varying environments. One case study is human assembly evaluation method in the automobile industry which is currently manual intensive to investigate digitally. For this case, a mannequin is trained to perform pick and place operations in varying environments and thus automating assembly validation process in early design phases. The next application is path-finding of mobile robots including an articulated arm to perform pick and place operations. This application is expensive to setup with classical methods and thus RL enables an automated approach for this task as well.

    sted, utgiver, år, opplag, sider
    Frontiers Media S.A., 2023
    Emneord
    Reinforcement Learning, Unity Game Engine, Mobile Robot, Mannequin, Production Environment
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-195616 (URN)10.3389/fmtec.2023.1154263 (DOI)
    Forskningsfinansiär
    Vinnova, 2020-05173
    Tilgjengelig fra: 2023-06-22 Laget: 2023-06-22 Sist oppdatert: 2024-05-21bibliografisk kontrollert
    Fulltekst (pdf)
    fulltext
    Download (png)
    presentationsbild
  • 33.
    Nambiar, Sanjay
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Albert, Albin Parappilly
    Linköpings universitet.
    Rimmalapudi, Veeravenkatamanikanta Virupaksh Raja Chowdary
    Linköpings universitet.
    Acharya, Vinayak
    Linköpings universitet.
    Tarkian, Mehdi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Kihlman, Henrik
    Prodtex AB, Sweden.
    Autofix – Automated Design of Fixtures2022Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents a framework to develop the automated design of fixtures using the combination ofdesign automation (DA), multidisciplinary optimization and robotic simulation. MDO necessitates the useof concurrent and parametric designs which are created by DA and knowledge-based engineering tools. Thisapproach is designed to decrease the time and cost of the fixture design process by increasing the degree ofautomation. AutoFix provides methods and tools for automatically optimizing resource-intensive fixturedesign utilizing digital tools from different disciplines.

  • 34.
    Nambiar, Sanjay
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Ananno, Anan Ashrabi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Titus, Herman
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Wiberg, Anton
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Tarkian, Mehdi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Multidisciplinary Automation in Design of Turbine Vane Cooling Channels2024Inngår i: International Journal of Turbomachinery, Propulsion and Power, ISSN 2504-186X, Vol. 9, nr 1, artikkel-id 7Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In the quest to enhance the efficiency of gas turbines, there is a growing demand for innovative solutions to optimize high-pressure turbine blade cooling. However, the traditional methods for achieving this optimization are known for their complexity and time-consuming nature. We present an automation framework to streamline the design, meshing, and structural analysis of cooling channels, achieving design automation at both the morphological and topological levels. This framework offers a comprehensive approach for evaluating turbine blade lifetime and enabling multidisciplinary design analyses, emphasizing flexibility in turbine cooling design through high-level CAD templates and knowledge-based engineering. The streamlined automation process, supported by a knowledge base, ensures continuity in both the mesh and structural simulation automations, contributing significantly to advancements in gas turbine technology.

  • 35.
    Nambiar, Sanjay
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Wiberg, Anton
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Tarkian, Mehdi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Automation of unstructured production environment by applying reinforcement learning2023Inngår i: Frontiers in Manufacturing Technology, E-ISSN 2813-0359, Vol. 3Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Implementation of Machine Learning (ML) to improve product and production development processes poses a significant opportunity for manufacturing industries. ML has the capability to calibrate models with considerable adaptability and high accuracy. This capability is specifically promising for applications where classical production automation is too expensive, e.g., for mass customization cases where the production environment is uncertain and unstructured. To cope with the diversity in production systems and working environments, Reinforcement Learning (RL) in combination with lightweight game engines can be used from initial stages of a product and production development process. However, there are multiple challenges such as collecting observations in a virtual environment which can interact similar to a physical environment. This project focuses on setting up RL methodologies to perform path-finding and collision detection in varying environments. One case study is human assembly evaluation method in the automobile industry which is currently manual intensive to investigate digitally. For this case, a mannequin is trained to perform pick and place operations in varying environments and thus automating assembly validation process in early design phases. The next application is path-finding of mobile robots including an articulated arm to perform pick and place operations. This application is expensive to setup with classical methods and thus RL enables an automated approach for this task as well.

    Fulltekst (pdf)
    fulltext
  • 36.
    Neguembor, Joachim
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Development of a Design Tool in CAD for Fused Deposition Modelled Coolant Nozzles in Grinding: Design automation of coolant nozzles2022Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    This thesis covers the process of automating the design of coolant nozzles used for cylindrical grinding. Coolant nozzles are used to supply coolant, an oil and water mixture used to cool the metal workpiece and lubricate the grinding wheel. In the automotive industry, grinding is used to reduce the surface roughness of the workpiece. However, a large amount of heat is generated, risking the heat treatment of the steel to be compromised, for this, coolant is supplied to minimize the heat caused by friction. A nozzle is used, aiming a jet to the zone that generates heat. Commonly used nozzles are adjustable, leading to variation in cooling performance if misaligned. The design of fixed nozzles is developed in this thesis to reduce variation and automatise the design for multiple applications. The automatically designed nozzles are fused deposition modeled and tested. The design automation tool is tested repeatedly and improved successively in the span of the thesis. This lead to a great extent of implementation of design automation. Which lead to a facilitation in reaching of the work zone and avoid obstacles. Also, the tool managed to create nozzle tubes for a multitude of machines. The tool is able to generate, aim, orient, and individually dimension multi-nozzle tubes. Design of Experiment methodology is implemented to find nozzle designs with improved velocity and flow rate and minimize the air mixture with the coolant. Several nozzle designs are tested and fitted into a surrogate model that is, in turn, optimized. The results of the tests led to a greater understanding of how the nozzle geometry restricts the flow rate when attempts of reaching higher velocities of the coolant jet are made. The surrogate models created, also made it possible to find the range of designs which best suits different applications, whereby a Pareto front was able to be populated with a range of different designs alternating in flow rate, velocity and coherency ratio.

    Fulltekst (pdf)
    fulltext
  • 37.
    Nordvall, Erik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Wiberg, Anton
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Tarkian, Mehdi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Knowledge-based engineering and computer vision for configuration-based substation design2023Inngår i: FRONTIERS IN MECHANICAL ENGINEERING-SWITZERLAND, ISSN 2297-3079, Vol. 9, artikkel-id 1154316Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Introduction: As the increase in electrification poses new demands on power delivery, the quality of the distribution system is paramount. Substations are a critical part of power grids that allow for control and service of the electrical distribution system. Substations are currently developed in a project-based and manually intensive manner, with a high degree of manual work and lengthy lead times. Substations are primarily sold through tenders that are accompanied by an inherent need for engineering-to-order activities. Although necessary, these activities present a paradox as tender processes must be agile and fast. To remedy this shortcoming, this article outlines a knowledge capture and reuse methodology to standardize and automate the product development processes of substation design.Methods: A novel framework for substation design is presented that implements knowledge-based engineering (KBE) and artificial intelligence methods in computer vision to capture knowledge. In addition, a product configuration system is presented, utilizing high-level CAD templates. The development has followed the KBE methodology MOKA.Results: The proposed framework has been implemented on several company cases where three (simplified) are presented in this paper. The framework decreased the time to create a 3D model from a basic electric single line diagram by performing the identification and design tasks in an automated fashion.Discussion: Ultimately, the framework will allow substation design companies to increase competitiveness through automation and knowledge management and enable more tenders to be answered without losing engineering quality.

    Fulltekst (pdf)
    fulltext
  • 38. Bestill onlineKjøp publikasjonen >>
    Oprea, Alexandra
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    On aircraft simulation in conceptual design2022Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The aerospace industry has a long tradition of using Model Based Systems Engineering in its development processes. Throughout the years an extensive library of system simulation models has been created, expanding with every new model being developed. Nevertheless, modelling and simulation engineers prefer developing their own models from scratch, as the reuse of legacy models seems cumbersome, leading to the simultaneous existence of multiple simulation models of the same system in a project. Not only does the development, verification and validation and maintenance of these multiple simulation models incur extra costs, but they also represent a potential threat to the aircraft development, as data consistency is more difficult to be ensured. 

    The aim of this thesis is to investigate simulation model reuse during the aircraft development process, with the goal of creating an easy-to-reconfigure simulation framework, allowing for the inclusion of simulation models of various levels of fidelity. Through an industry-as-laboratory approach, the inclusion of industry-grade legacy system simulation models is investigated, with the help of simulation model integration standards such as Functional Mock-up Interface and System Structure and Parametrisation. 

    The results of the work include the development of a proof-of-concept simulation framework that enables the aggregation, integration and reuse of simulation models from different technological domains and with different levels of fidelity. Moreover, the work proposes a workflow that streamlines the decision milestones when faced with the possibility of selecting between creating a new system simulation model or reusing a legacy one, and highlights the challenges associated with model reuse from both a technical and an organisational perspective. 

    Delarbeid
    1. Aspects of flight simulation development in relation to scientific software: a literature review
    Åpne denne publikasjonen i ny fane eller vindu >>Aspects of flight simulation development in relation to scientific software: a literature review
    Vise andre…
    2021 (engelsk)Inngår i: AIAA AVIATION 2021 FORUM, American Institute of Aeronautics and Astronautics , 2021Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    This paper presents and analyses the research front on development methodologies that can be applied to flight simulations for development purposes. This field includes any flight simulator used during the development phase of an aircraft, when flight test or other validation data is still scarce. A review of the literature published between 1999-2019 is performed. As flight-specific literature on the topic is limited, a broader view on flight simulators is adopted. Simulators are regarded as risk-averse scientific software; that is, software created to understand a phenomenon and whose primary goal is to be correct. This perspective highlights the lack of suitable established software development methodologies (SwDev) for this software type. Two solutions to this problem have been identified: one treating scientific SwDev as a knowledge acquisition process, and another one treating it as development of enabling systems, following the established product development processes. These solutions need to be completed with methodologies to deal with the multidisciplinarity of the flight simulation problem, such as model exchange standards or workflows for multidisciplinary collaboration.

    sted, utgiver, år, opplag, sider
    American Institute of Aeronautics and Astronautics, 2021
    Serie
    AIAA AVIATION Forum
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-188899 (URN)10.2514/6.2021-2998 (DOI)9781624106101 (ISBN)
    Tilgjengelig fra: 2022-09-30 Laget: 2022-09-30 Sist oppdatert: 2022-09-30
    2. Connecting system simulation to aircraft concept development
    Åpne denne publikasjonen i ny fane eller vindu >>Connecting system simulation to aircraft concept development
    Vise andre…
    2021 (engelsk)Inngår i: Proceedings of the 32nd Congress of the International Council of the Aeronautical Sciences, 2021Konferansepaper, Publicerat paper (Annet vitenskapelig)
    Abstract [en]

    This study presents a solution for connecting system simulation and aircraft concept development using solely open standards. An easy-to-use optimisation framework for aircraft concept development is created with the help of the Modelica, Functional Mock-up Interface (FMI), and System Structure and Parameterization (SSP) standards, and the open source tools OpenModelica and OMSimulator. The framework allows for conceptual aircraft design accounting for transient phenomena by means of standardised integration of dynamic simulation models of aircraft subsystems. The framework is applied to an industry-relevant use case concerning the concept development of a generic fighter aircraft. The generality and modularity of the framework and its straightforward implementation enables tailoring of the optimisation goals to the user needs and requirements. The adoption of industry-wide standards allows for the inclusion of system simulation models developed in the modelling tool best suited for each discipline, thus integrating dynamic system simulation already at the aircraft conceptual design stage.

    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-188901 (URN)9783932182914 (ISBN)
    Konferanse
    32nd Congress of the International Council of the Aeronautical Sciences.Shanghai/Virtual
    Tilgjengelig fra: 2022-09-30 Laget: 2022-09-30 Sist oppdatert: 2022-09-30
    Fulltekst (pdf)
    fulltext
  • 39.
    Oprea, Alexandra
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten. Saab Group, Linköping, Sweden.
    Eek, Magnus
    Saab Group, Linköping, Sweden.
    Staack, Ingo
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Filosofiska fakulteten.
    Ölvander, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Gavel, Hampus
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten. Saab Group, Linköping, Sweden.
    Aspects of flight simulation development in relation to scientific software: a literature review2021Inngår i: AIAA AVIATION 2021 FORUM, American Institute of Aeronautics and Astronautics , 2021Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    This paper presents and analyses the research front on development methodologies that can be applied to flight simulations for development purposes. This field includes any flight simulator used during the development phase of an aircraft, when flight test or other validation data is still scarce. A review of the literature published between 1999-2019 is performed. As flight-specific literature on the topic is limited, a broader view on flight simulators is adopted. Simulators are regarded as risk-averse scientific software; that is, software created to understand a phenomenon and whose primary goal is to be correct. This perspective highlights the lack of suitable established software development methodologies (SwDev) for this software type. Two solutions to this problem have been identified: one treating scientific SwDev as a knowledge acquisition process, and another one treating it as development of enabling systems, following the established product development processes. These solutions need to be completed with methodologies to deal with the multidisciplinarity of the flight simulation problem, such as model exchange standards or workflows for multidisciplinary collaboration.

  • 40.
    Oprea, Alexandra
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Hällqvist, Robert
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    Knöös Franzén, Ludvig
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    Eek, Magnus
    The Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Staack, Ingo
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    Gavel, Hampus
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Connecting system simulation to aircraft concept development2021Inngår i: Proceedings of the 32nd Congress of the International Council of the Aeronautical Sciences, 2021Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    This study presents a solution for connecting system simulation and aircraft concept development using solely open standards. An easy-to-use optimisation framework for aircraft concept development is created with the help of the Modelica, Functional Mock-up Interface (FMI), and System Structure and Parameterization (SSP) standards, and the open source tools OpenModelica and OMSimulator. The framework allows for conceptual aircraft design accounting for transient phenomena by means of standardised integration of dynamic simulation models of aircraft subsystems. The framework is applied to an industry-relevant use case concerning the concept development of a generic fighter aircraft. The generality and modularity of the framework and its straightforward implementation enables tailoring of the optimisation goals to the user needs and requirements. The adoption of industry-wide standards allows for the inclusion of system simulation models developed in the modelling tool best suited for each discipline, thus integrating dynamic system simulation already at the aircraft conceptual design stage.

  • 41. Bestill onlineKjøp publikasjonen >>
    Poot, Leon Peter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    On Configuration Systems in Product Development for Mass Customisation2021Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Increased industrial interest in mass customisation causes designers and manufacturers to seek cost-effective methods to continuously rationalise product development and production processes in order to accommodate for customisation on a large scale. Particularly in the case of complex products this requires significant engineering efforts. 

    Mass customisation in an engineer-to-order context includes customers in early stages of product development, providing designers and manufacturers with certainty in decision making. A large portion of design tasks associated with design and production preparation stages during the product development process are routine-like and repetitive, amounting to vast time costs and errors. By utilising knowledge-based design automation techniques, these tasks can be supported to allow for iterative design processes as well as improved integration and communication between development phases. This  work explores how the use of design automation in the form of product configuration systems can facilitate integration throughout the product development process of engineer-to-order products and allow the industry to rise to the challenge of mass customisation.

    This licentiate thesis describes the development of a framework incorporating product configuration systems based on High Level CAD templates (HLCt) together with auxiliary design optimisation and production preparation tools. Leveraging on the reuse of product knowledge, it focuses on rapid configuration of light-weight conceptual designs for quotation in dialogue with customers, and support of detailed design and generation of production data for confirmed orders. Based on the findings from implementation of such framework in an SME context of mass customisation of spiral staircases as well as engineering education, the challenges and possibilities are discussed with an eye on the future of design automation for mass customisation.

    Delarbeid
    1. Integrating sales and design: Applying CAD configurators in the product development process
    Åpne denne publikasjonen i ny fane eller vindu >>Integrating sales and design: Applying CAD configurators in the product development process
    2020 (engelsk)Inngår i: Proceedings of the Design Society: DESIGN Conference, Cambridge University Press, 2020, Vol. 1, s. 345-354Konferansepaper, Publicerat paper (Fagfellevurdert)
    Abstract [en]

    With industries striving towards increased customisation of complex products through engineer-to-order, methods are continuously sought to rationalise the product development process. To this end, a framework is proposed using CAD configurators, utilising design automation and knowledge-based engineering to integrate sales and design processes in product development. The application of this framework to the design of spiral staircases is described and analysed, with results showing decreased lead-times and a decreased risk for design errors.

    sted, utgiver, år, opplag, sider
    Cambridge University Press, 2020
    Serie
    Proceedings of the Design Society: DESIGN Conference, ISSN 2633-7762 ; 1
    Emneord
    Computer-aided design (CAD), Design automation, Knowledge-based engineering (KBE), Product configuration, Mass customisation
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-176082 (URN)10.1017/dsd.2020.129 (DOI)
    Konferanse
    16th International Design Conference, Online, October 26-29 2020
    Tilgjengelig fra: 2021-06-04 Laget: 2021-06-04 Sist oppdatert: 2022-03-04bibliografisk kontrollert
    2. Integrating Sales, Design and Production: A Configuration System for Automation in Mass Customization
    Åpne denne publikasjonen i ny fane eller vindu >>Integrating Sales, Design and Production: A Configuration System for Automation in Mass Customization
    2021 (engelsk)Inngår i: Proceedings of ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC-CIE2021): Volume 3B: 47th Design Automation Conference (DAC), New York: The American Society of Mechanical Engineers , 2021, artikkel-id V03BT03A042Konferansepaper, Publicerat paper (Fagfellevurdert)
    Abstract [en]

    Companies manufacturing customized engineer-to-order (ETO) products are decelerated by repetitive work, misinterpretations and uncoordinated processes which prohibits the achievement of mass customization. Being able to deliver customized product with low costs and fast delivery times, the concept of mass customization, is a prerequisite for maintained competitiveness with the demands from the market today. This paper presents a product configuration system (PCS) for customized products using design automation enabled by knowledge-based engineering (KBE) and enterprise-wide optimization (EWO). With this approach, the process from sales to delivery of customized products can be extensively rationalized. The PCS consists of two modules. The first being a configurator for use in the sales quotation stage. Here, customer requirements are captured, and used to generate alternatives feasible for the customer context. Thereby, correct quotations can be generated at the sales instance. The second module is the enterprise-wide configurator where accepted orders are concurrently optimized for their detailed and final design, considering the current state of the production and concurrent sales cases in the company. In other terms, instead of adapting the supply chain according to the design of the products in the order entry, the design of the products in the order entry are adapted according to the state of the supply chain. Thereby, resources can be efficiently utilized to the benefit of both the customer and the company, with reduced costs and delivery times. An implementation of the PCS in a case concerning spiral staircases, an ETO product, has shown potential of substantially reducing resources and errors and enable a reliable process supporting achievement of mass customization.

    sted, utgiver, år, opplag, sider
    New York: The American Society of Mechanical Engineers, 2021
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-181811 (URN)10.1115/DETC2021-68426 (DOI)9780791885390 (ISBN)
    Konferanse
    ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Virtual, Online, August 17–19, 2021
    Prosjekter
    e-FACTORY
    Forskningsfinansiär
    VinnovaSwedish Research Council Formas
    Tilgjengelig fra: 2021-12-13 Laget: 2021-12-13 Sist oppdatert: 2022-03-04bibliografisk kontrollert
    3. Design and Production Automation for Mass Customisation: An Initial Framework Proposal Evaluated in Engineering Education and SME Contexts
    Åpne denne publikasjonen i ny fane eller vindu >>Design and Production Automation for Mass Customisation: An Initial Framework Proposal Evaluated in Engineering Education and SME Contexts
    2021 (engelsk)Inngår i: Transdisciplinary Engineering for Resilience: Responding to System Disruptions / [ed] Linda Newnes, Susan Lattanzio, Bryan R. Moser, Josip Stjepandić, Nel Wognum, Amsterdam: IOS Press, 2021, s. 71-80Konferansepaper, Publicerat paper (Fagfellevurdert)
    Abstract [en]

    Maintaining high product quality while reducing cost is essential for mass-customised products, requiring continuous improvement of the product development process. To this end, design automation should be utilised in all stages of a product’s develop process and lay the foundation for automation of repetitive tasks throughout the process from interaction with the customer to design and production in order to mitigate errors and minimise costs. In this paper, a design automation and production preparation framework is proposed that can facilitate automation from initial stages via CAD to production. Examples of the framework are shown in the shape of proof-of-concepts systems developed by master students in the context of a course in design automation at Linköping University. Included disciplines such as automated planning of robot assembly paths, CNC manufacturing files and production drawings are described, based on design automation, Knowledge-Based Engineering, and design optimisation. Additionally, variations of the framework are implemented at three SMEs, and the results thereof are presented. The proposed frameworks enable interaction and connection between the "softer", human centred, aspects of customer interaction within sales, with more traditional "harder" engineering disciplines in design and manufacturing.

    sted, utgiver, år, opplag, sider
    Amsterdam: IOS Press, 2021
    Serie
    Advances in Transdisciplinary Engineering, ISSN 2352-751X, E-ISSN 2352-7528 ; 16
    Emneord
    Design Automation, Mass Customisation, Product Configuration, Production Preparation, Transdisciplinary Engineering Education
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-181813 (URN)10.3233/ATDE210084 (DOI)978-1-64368-208-2 (ISBN)978-1-64368-209-9 (ISBN)
    Konferanse
    28th ISTE International Conference on Transdisciplinary Engineering, Virtual, July 5 – July 9, 2021
    Prosjekter
    e-FACTORY
    Tilgjengelig fra: 2021-12-13 Laget: 2021-12-13 Sist oppdatert: 2022-03-04bibliografisk kontrollert
    Fulltekst (pdf)
    fulltext
    Download (png)
    presentationsbild
  • 42.
    Poot, Leon Peter
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Tarkian, Mehdi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Design and Production Automation for Mass Customisation: An Initial Framework Proposal Evaluated in Engineering Education and SME Contexts2021Inngår i: Transdisciplinary Engineering for Resilience: Responding to System Disruptions / [ed] Linda Newnes, Susan Lattanzio, Bryan R. Moser, Josip Stjepandić, Nel Wognum, Amsterdam: IOS Press, 2021, s. 71-80Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Maintaining high product quality while reducing cost is essential for mass-customised products, requiring continuous improvement of the product development process. To this end, design automation should be utilised in all stages of a product’s develop process and lay the foundation for automation of repetitive tasks throughout the process from interaction with the customer to design and production in order to mitigate errors and minimise costs. In this paper, a design automation and production preparation framework is proposed that can facilitate automation from initial stages via CAD to production. Examples of the framework are shown in the shape of proof-of-concepts systems developed by master students in the context of a course in design automation at Linköping University. Included disciplines such as automated planning of robot assembly paths, CNC manufacturing files and production drawings are described, based on design automation, Knowledge-Based Engineering, and design optimisation. Additionally, variations of the framework are implemented at three SMEs, and the results thereof are presented. The proposed frameworks enable interaction and connection between the "softer", human centred, aspects of customer interaction within sales, with more traditional "harder" engineering disciplines in design and manufacturing.

    Fulltekst (pdf)
    fulltext
  • 43.
    Rapp, Jacob
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Thorsson Mendoza, Cristoffer
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Konceptutveckling av stommar för framtida bordtennisracketar: Undersökning av nya material- och designlösningar för STIGA Sports bordtennissortiment2022Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Historically, table tennis blades have been subject to few changes. Apart from the introduction of a few new materials, such as carbon fibre, resulting from rule changes in the sport, the pace of change has been slow. This project is based on three cases containing potential rule changes to the regulations of the sport regarding the construction of blades. Furthermore, the sport, its user’s needs, and potential new materials to implement have been investigated, resulting in the development of a series of prototypes. A total of 21 prototypes have been used with the aim of improving the control properties of the blade, which along with speed and spin are considered the most important playing characteristics in a table tennis stroke. The overall result from user tests indicates that three of the prototypes possess interesting properties which should be investigated further, out of which two are presented in this report. These prototypes consist of a prototype where a layer of the fibrous material Vectran is included, and a prototype where a layer consists of a honeycomb structure made of the material Nomex, and a third prototype that upon request from the company has been decided to be excluded from the report. Finally, recommendations for further development of these prototypes are described. 

    Fulltekst (pdf)
    Konceptutveckling av stommar för framtida bordtennisracketar, Rapp & Thorsson Mendoza
  • 44.
    Ribeiro, Luis
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Ananno, Anan Ashrabi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    A Software Toolbox for Realistic Dataset Generation for Testing Online and Offline 3D Bin Packing Algorithms2023Inngår i: Processes, ISSN 2227-9717, Vol. 11, nr 7, artikkel-id 1909Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Packing products into a pallet or other medium is an unavoidable activity for producing companies. In many cases, packing is based on operator experience and training using packing patterns that have worked before. Automated packing, on the other hand, requires a systematic procedure for devising packing solutions. In the scientific literature, this problem is known as 3D bin packing (3DBP) and many authors have proposed exact and heuristic solutions for many variations of the problem. There is, however, a lack of datasets that can be used to test and validate such solutions. Many of the available datasets use randomly generated products with extremely limited connection to real practice. Furthermore, they contain a reduced number of product configurations and ignore that packing relates to customers orders, which have specific relative mixes of products. This paper proposes a software toolbox for generating arbitrarily large datasets for 3DBPP based on real industry data. The toolbox was developed in connection with the analysis of a real dataset from the food and beverages sector, which enabled the creation of several synthetic datasets. The toolbox and the synthetic datasets are publicly available and can be used to generate additional data for testing and validating 3DBP solutions. The industry is increasingly becoming data dependent and driven. The ability to generate good quality synthetic data to support the development of solutions to real industry problems is of extreme importance. This work is a step in that direction in a domain where open data are scarce.

    Fulltekst (pdf)
    fulltext
  • 45.
    Ribeiro, Luis
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Gomes, Luis
    Center of Technology and Systems, Department of Electrical and Computer Engineering, NOVA University Lisbon, Lisbon, Portugal.
    Describing Structure and Complex Interactions in Multi-Agent-Based Industrial Cyber-Physical Systems2021Inngår i: IEEE Access, E-ISSN 2169-3536, Vol. 9, s. 153126-153141Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The description of structure and complex interactions in Multi-agent-based Industrial Cyber-physical (MAS-ICPS) systems has been elusively addressed in the literature. Existing works, grounded on model-based engineering, have been successful at characterizing and solving system integration problems. However, they fail to describe accurately the collective and dynamic execution behaviour of large and complex industrial systems, particularly in more discrete production domains, such as: automotive, home appliances, aerospace, food and beverages, etc. In these domains, the execution flow diverts dynamically due to production disturbances, custom orders, fluctuations in demand in mixed model production, faults, quality-control and product rework, etc. These dynamic conditions require re-allocation and reconfiguration of production resources, redirection of production flows, re-scheduling of orders, etc. A meta-model for describing the structure and complex interactions in MAS-ICPS is defined in this paper. This contribution goes beyond the State-Of-The-Art (SOTA) as the proposed meta-model describes structure, as many other literature contributions, but also describes the execution behaviour of arbitrarily complex interactions. The previous is achieved with the introduction of general execution flow control operators in the meta-model. These operators cover, among other aspects, delegation of the execution flow and dynamic decision making. Additionally, the contribution also goes beyond the SOTA by including validation mechanisms for the models generated by the meta-model. Finally, the contribution adds to the current literature by providing a meta-model focusing on production execution and not just on describing the structural connectivity aspects of ICPSs.

    Fulltekst (pdf)
    fulltext
  • 46.
    Ribeiro, Luis
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Mihnea, Mihaela
    Orebro Univ, Sweden.
    Skjoldebrand, Christina
    CFB Creat Future Business AB, Sweden.
    Lareke, Anders
    En God Granne AB, Sweden.
    Food Passports and Intelligent Food Recipes: The Data-Oriented Way of Producing Food2024Inngår i: Applied Sciences, E-ISSN 2076-3417, Vol. 14, nr 6, artikkel-id 2247Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper discusses a Multiagent System architecture and its supporting concepts and technical implementation for food-producing systems. The Food and Beverages industry is in dire need of embracing more advanced industrial digitization practices to be able to meet immediate sustainability requirements. One such challenge is improving and optimizing resource utilization. A more rationalized use of raw materials, production processes and machinery is a key aspect of the latter. At the same time, food is still produced, in many instances, in a very traditional way, particularly when it comes to ingredient selection. The architecture introduced in this paper has the ambition of articulating the supply and demand of food products based in the technical characteristics of food (e.g., composition, nutritional content and value, processing efficiency, and taste profiles) instead of the more traditional characteristics. To that end, the paper introduces, among other key concepts, the notion of the Digital Food Identity Card as an active digital document that stores such technical information and the notion of Dynamic Recipe as an active software entity with the dynamic capability of adjusting production parameters in a recipe to market conditions, as well as coordinating the resources included in the execution of a industrial food recipe. Both concepts are modeled as agents and part of the proposed architecture. Finally, the paper provides a formal grammar for a domain specific language, that can be used by human specialists to define a dynamic recipe and be simultaneously interpreted by Dynamic Recipe Agents to enact the behaviours previously described. The domain specific language is an integral part of the architecture, together with the agent-based formulation, and an important link in creating an effectively data-oriented way of articulating different stake-holder concerns. The proposed solution is informed by requirements elicited within domain experts and sustainability targets that food-producing companies currently must adhere to.

  • 47. Bestill onlineKjøp publikasjonen >>
    Ruiz Muñoz, Juan Felipe
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Problems in Problem-Based Design Engineering Education: Towards a Multidisciplinary Designerly Educational Approach2024Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Modern industry faces complex and 'wicked' problems that require engineering professionals to go beyond traditional natural science-based linear problem-solving approaches and adopt collaborative, multidisciplinary, and iterative problem-solving strategies. To tackle these kinds of problems, organizations are increasingly turning to design problem- solving methods based on the designer’s way of thinking, acting, and doing. Designers have a distinctive ability to deal with poorly defined, ambiguous, or "wicked" problems by emphasizing iterative exploration of both the problem and the solution spaces. They do this through design reasoning patterns that involve constant iteration and temporary solutions. This shift towards designerly ways of problem-solving has, in turn, had an effect on engineering education, where there has been a significant shift towards educational models that utilize design methodologies to engage students in immersive problem-solving experiences. One challenge for educators who utilize models based on designerly thinking is to create structures that actually support the learning objectives, and the development of student skills that are rooted in design reasoning and acting, and not merely in design tools. Another challenge is to support collaboration across multiple areas that traditionally had clear boundaries.

    This thesis studies practices utilized by educators in problem-based designerly education to understand the underlying mechanisms and theoretical underpinnings of problem exploration in multidisciplinary education. Additionally, this thesis aims to explore and discuss the same processes and methods in the context of multidisciplinary education and design objects that can support collaboration across boundaries.

    This thesis's key contributions are the exploration and discussion of aspects of problem exploration, framing, and reframing in a designerly problem-based multidisciplinary educational environment, as well as the challenges and difficulties that educators and students encounter in the process of exploring problems and collaborating and crossing disciplinary boundaries with participants from multiple disciplines. To do so, this thesis first explores the importance that (the framing of the) design brief has in the problem-solving process. Furthermore, the design briefs are discussed as boundary objects that serve a crucial role in negotiation, communication, and coordination tools between stakeholders. Second, the importance of the reflective process that follows the idea generation and prototype-building activities are discussed as an aspect of an educational model that allows participants to explore problems and avoid design fixation. Moreover, these objects are discussed based on their function as disciplinary boundary crossing objects and as an aid in negotiation, and collaboration objects in problem exploration. Thirdly, methods and processes for assessment of student characteristics and skills are discussed, where tensions and trade-offs between self-reporting and observer-based methods are studied and explored. These methods then serve as boundary objects in the discussions between teaching teams in the student team formation process. Furthermore, team building and specifically the process of trust-building and objects that aid in boundary-crossing collaboration and communication to develop trust between students are also discussed.

    Delarbeid
    1. The Problem of Formulating Design Problems: A Typology of Design Briefs
    Åpne denne publikasjonen i ny fane eller vindu >>The Problem of Formulating Design Problems: A Typology of Design Briefs
    2020 (engelsk)Licentiatavhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    It is common for a design team to be handed a problem to solve for others. The handing over is normally referred to as a ‘briefing’ process, and the documentation of the starting point and what is to be done is known as a ‘brief’. It is known that the way we frame and understand a problem influences what paths we see to potential solutions. The aim of this thesis is to understand what makes a good design brief and to do so in order to create an empirically informed, and theoretically underpinned, typology of design briefs and the kind of search processes they are disposed to induce.

    Different bodies of literature have tried to grasp how design solves problems in order to understand designer’s behavior and ultimately facilitate or improve it. Distinctions can, and have been made, between different kinds of problem formulations, as well as different problem-solving approaches. This thesis aims to integrate two previously distinct literatures, search process from the organizational perspective developed by James G. March, Herbert A. Simon, Richard Cyert and others and Design and the Design Process from the perspectives of authors such as Donald Schön, Kees Dorst and Nigel Cross among others, to propose a typology of design briefs in order to ultimately facilitate problem formulation and subsequently facilitate the design process.

    The simple and immediate answer to the question of what makes a good design brief is: ‘that depends’. It depends on the design process to be followed (if there is one), it depends on the kind of goals that should be achieved, the time available, and it also depends on how much and what is known about the problem and potential solutions. Based on this, four ideal types of design briefs are articulated, including the expected associated search behavior and challenges of design teams.

    Abstract [sv]

    Det är vanligt att ett designteam får ett problem att lösa åt andra. Överlämnandet kallas normalt en ”briefing” -process och dokumentationen av utgångspunkten och vad som ska göras kallas ett ”design brief ”. Det är känt att det sätt vi ramar in och förstår ett problem påverkar vilka vägar vi ser till potentiella lösningar. Syftet med denna avhandling är att förstå vad som gör ett bra ”design brief ” och att göra det för att skapa en empiriskt informerad och teoretiskt underbyggd typologi av design brief och vilken typ av sökprocesser de uppmuntrar.

    Olika litteratur har försökt förstå hur design löser problem för att förstå designerns beteende och i slutändan underlätta eller förbättra det. Skillnader kan och har gjorts mellan olika typer av problemformuleringar och olika problemlösningsmetoder. Denna avhandling syftar till att integrera två tidigare distinkta litteraturområden, sökprocess ur det organisatoriska perspektivet som utvecklats av James G. March, Herbert A. Simon, Richard Cyert och andra samt Design och designprocessen ur perspektiv av författare som Donald Schön, Kees Dorst och Nigel Cross bland andra för att föreslå en typologi av design brief för att underlätta problemformulering och därmed också underlätta designprocessen.

    Det enkla och omedelbara svaret på frågan om vad som gör ett bra design brief är: ”det beror på”. Det beror på designprocessen som ska följas (om det finns en), det beror på vilken typ av mål som ska uppnås, den tillgängliga tiden, och det beror också på hur mycket och vad som är känt om problemet och potentiella lösningar. Baserat på detta artikuleras fyra idealtyper av design brief, inklusive det förväntade associerade sökbeteendet och utmaningar för designteam.  

    sted, utgiver, år, opplag, sider
    Linköping: Linköping University Electronic Press, 2020. s. 155
    Serie
    Linköping Studies in Science and Technology. Licentiate Thesis, ISSN 0280-7971 ; 1895
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-171558 (URN)10.3384/diss.diva-171558 (DOI)9789179297374 (ISBN)
    Presentation
    2020-11-24, ACAS, A-Building and Zoom, Campus Valla, Linköping, 10:00 (engelsk)
    Opponent
    Veileder
    Merknad

    ISBN saknas i avhandlingen.

    Tilgjengelig fra: 2020-11-23 Laget: 2020-11-23 Sist oppdatert: 2024-04-23bibliografisk kontrollert
    2. Design team formation using self-assessment and observer-assessment techniques: mapping practices in a global network of universities
    Åpne denne publikasjonen i ny fane eller vindu >>Design team formation using self-assessment and observer-assessment techniques: mapping practices in a global network of universities
    2024 (engelsk)Inngår i: Design Science, E-ISSN 2053-4701, Vol. 10, artikkel-id e7Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    Design engineering education is increasingly challenge-based, which requires educators to form cohesive student teams capable of delivering desired outcomes while fostering learning and collaboration. An example is an international network in which students from different global universities collaborate. Student teams work on researching the problem space, re-framing their challenge and producing multiple prototypes. The challenge for the teaching teams is to be able to form multiple cohesive teams out of a pre-selected group of highly motivated students. Because of the exclusive nature of this educational program, it is a suitable case study for exploring student design team formation practices. The aim is to identify the methods, tools, theoretical underpinnings, challenges and limitations of student team formation. We interviewed teachers from seven universities about their practices. The interviewees had several years of experience in team building. The interviews were analyzed to contrast practices across universities as well as to the team formation literature. Our findings show that mixed methods that combine self-assessments and observer-assessment methods are the preferred means of forming teams. Our findings also show that current practices have evolved over time through trial and error, and are only partially grounded in different literatures and not necessarily in team formation literature.

    sted, utgiver, år, opplag, sider
    CAMBRIDGE UNIV PRESS, 2024
    Emneord
    Team formation; Challenge-based learning; Design thinking; Design education
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-201684 (URN)10.1017/dsj.2024.4 (DOI)001165323400001 ()
    Tilgjengelig fra: 2024-03-19 Laget: 2024-03-19 Sist oppdatert: 2024-04-23
    3. This is how we roll; A play on creative thought and the generation of novelty
    Åpne denne publikasjonen i ny fane eller vindu >>This is how we roll; A play on creative thought and the generation of novelty
    2019 (engelsk)Inngår i: Proceedings of Meaningful Play 2018 / [ed] RABINDRA RATAN, BRIAN WINN, & Elizabeth LaPensée, ETC press, 2019, s. 380-387Konferansepaper, Publicerat paper (Fagfellevurdert)
    Abstract [en]

    This paper examines generation of novelty and creative dynamics in design teams that aim at arrivingat something truly novel. Looking at the works by Schumpeter, Campbell and March in explorationsfor solutions that go beyond what could be easily foreseeable and the works of Smith, Lindsey,Cardoso among others, in the field of design fixation, this paper explores an approach taken tointroduce elements of randomness in design exercises to prevent fixation and facilitate aimless andunguided explorations. The dynamic explained in this paper presents the utilization of a game-baseddynamic in design teams that facilitates the generation of novel ideas.

    sted, utgiver, år, opplag, sider
    ETC press, 2019
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-202978 (URN)10.1184/R1/9995969.v1 (DOI)
    Konferanse
    International academic conference on meaningful play, October 11-13 2018, East Lansing, Michigan
    Merknad

    The conference paper is licensed under a Creative CommonsAttribution-NonCommercial-NoDerivatives 4.0 International License

    Tilgjengelig fra: 2024-04-23 Laget: 2024-04-23 Sist oppdatert: 2024-04-23
    4. What is your (freaking) Problem? Prototypes for problem exploration on early stages of design
    Åpne denne publikasjonen i ny fane eller vindu >>What is your (freaking) Problem? Prototypes for problem exploration on early stages of design
    2023 (engelsk)Inngår i: From Abstractness to Concreteness – experiential knowledge and the role of prototypes in design research: International Conference 2023 of the Design Research Society Special Interest Group on Experiential Knowledge (EKSIG) Conference Proceedings / [ed] Silvia Ferraris, Valentina Rognoli, Nithikul Nimkulrat, Politecnico di MIlano , 2023, s. 702-715Konferansepaper, Publicerat paper (Fagfellevurdert)
    Abstract [en]

    Prototyping is a crucial element of the design activity. Prototypes serve as temporary and incomplete embodiments of design ideas with which designers explore the design problem as well as propose and refine possible solutions to the problem. Given its deep connection to solutions, prototyping has been typically associated with the later stages of design. A stage in which the problem has been sufficiently mapped that a solution can be proposed and refined based on the discovery of requirements. Yet the question of what it means to prototype for problem exploration remains. To provide an answer to this question, first we take a quick look at what the role of prototypes is in design and more specifically what their role might be in the early stages of design. And later we discuss from the perspective of the reflective conversation that the designer has with the artifact it has created and what we reflect on when dealing with problem exploration. Subsequently some illustrative examples are presented of unintentional problem exploration prototyping from student design projects. To conclude, a reflection of the importance of design education in preparing practitioners to better deal with different types of prototyping beyond solution refinement. 

    sted, utgiver, år, opplag, sider
    Politecnico di MIlano, 2023
    Emneord
    Problem-space, early design, problem-oriented prototyping, design education, prototype
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-198348 (URN)9788894167436 (ISBN)
    Konferanse
    EKSIG23 - International Conference 2023 of the Design Research Society Special Interest Group on Experiential Knowledge, Politecnico di Milano, Italy, 19-20 June, 2023
    Tilgjengelig fra: 2023-10-06 Laget: 2023-10-06 Sist oppdatert: 2024-04-23bibliografisk kontrollert
    Fulltekst (pdf)
    fulltext
    Download (png)
    presentationsbild
  • 48.
    Ruiz Muñoz, Juan Felipe
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Wever, Renee
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    What is your (freaking) Problem? Prototypes for problem exploration on early stages of design2023Inngår i: From Abstractness to Concreteness – experiential knowledge and the role of prototypes in design research: International Conference 2023 of the Design Research Society Special Interest Group on Experiential Knowledge (EKSIG) Conference Proceedings / [ed] Silvia Ferraris, Valentina Rognoli, Nithikul Nimkulrat, Politecnico di MIlano , 2023, s. 702-715Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Prototyping is a crucial element of the design activity. Prototypes serve as temporary and incomplete embodiments of design ideas with which designers explore the design problem as well as propose and refine possible solutions to the problem. Given its deep connection to solutions, prototyping has been typically associated with the later stages of design. A stage in which the problem has been sufficiently mapped that a solution can be proposed and refined based on the discovery of requirements. Yet the question of what it means to prototype for problem exploration remains. To provide an answer to this question, first we take a quick look at what the role of prototypes is in design and more specifically what their role might be in the early stages of design. And later we discuss from the perspective of the reflective conversation that the designer has with the artifact it has created and what we reflect on when dealing with problem exploration. Subsequently some illustrative examples are presented of unintentional problem exploration prototyping from student design projects. To conclude, a reflection of the importance of design education in preparing practitioners to better deal with different types of prototyping beyond solution refinement. 

    Fulltekst (pdf)
    fulltext
  • 49.
    Ruiz Muñoz, Juan
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Wever, Renee
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Design team formation using self-assessment and observer-assessment techniques: mapping practices in a global network of universities2024Inngår i: Design Science, E-ISSN 2053-4701, Vol. 10, artikkel-id e7Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Design engineering education is increasingly challenge-based, which requires educators to form cohesive student teams capable of delivering desired outcomes while fostering learning and collaboration. An example is an international network in which students from different global universities collaborate. Student teams work on researching the problem space, re-framing their challenge and producing multiple prototypes. The challenge for the teaching teams is to be able to form multiple cohesive teams out of a pre-selected group of highly motivated students. Because of the exclusive nature of this educational program, it is a suitable case study for exploring student design team formation practices. The aim is to identify the methods, tools, theoretical underpinnings, challenges and limitations of student team formation. We interviewed teachers from seven universities about their practices. The interviewees had several years of experience in team building. The interviews were analyzed to contrast practices across universities as well as to the team formation literature. Our findings show that mixed methods that combine self-assessments and observer-assessment methods are the preferred means of forming teams. Our findings also show that current practices have evolved over time through trial and error, and are only partially grounded in different literatures and not necessarily in team formation literature.

  • 50.
    Schön, Sofia
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Knöös Franzén, Ludvig
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system.
    Staack, Ingo
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    Marcus, Carina
    Saab Aeronautics, Linköping, Sweden.
    Amadori, Kristian
    Saab Aeronautics, Linköping, Sweden.
    Jouannet, Christopher
    Saab Aeronautics, Linköping, Sweden.
    Exploring the Impact of Model Fidelity Through Interactive Visualizations for System of Systems2022Inngår i: AIAA SciTech 2022 Forum, January 3-7, 2022, San Diego, CA & Virtual, USA: American Institute of Aeronautics and Astronautics, 2022Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Studying Systems of Systems (SoS) in relation to Measures of Effectiveness (MoE) is a difficult task. This is due to that SoSs include several system levels and operate in changing environments. There are also computational challenges related to modeling and simulation of SoSs and it is difficult to predict behaviors. Therefore, choosing model fidelity for system models and assessing their impact on MoE is of high relevance to the field. This paper illustrates an approach to modeling and simulation for SoSs that can be used to assess the impact of scenario parameters and to explore when level of fidelity on system level affects the MoE. This is made through a case study based on Search and Rescue (SAR) operations where a Design Of Experiments (DOE) of scenario parameters is performed and simulations of each scenario experiment is performed. The case study shows how Agent Based Simulations (ABS) can be used to obtain the MoE for different SAR missions and how the choice of model fidelity for one of the aircraft’s sensors has different effects for various scenarios. Additionally, a Visual Analytics (VA) approach is introduced and used to create a dashboard for visualizing the obtained simulation results in an interactive way. This allows users to make explorations on the resulting data and see how different scenarios influence the performance of each SoS. Furthermore, the results show that changes in scenario parameters impacts the MoE and that this is difficult to predict, at least using a quantitative method. The results point to the importance of exploration for both the scenario, using an interactive dashboard, but also to the importance of exploring the simulation model to study emerging phenomenon. The results of this approach have raised questions regarding if a more qualitative approach of studying SoSs could be beneficial to study MoE for SoSs and if inspiration could be transferred from a more scientific point of view of systems.

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