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  • 101.
    Fjellström, Jonatan
    Linköpings universitet, Institutionen för datavetenskap, Interaktiva och kognitiva system. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Gaze Interaction in Modern Trucks2014Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    In this master thesis project carried out on Scania’s interaction design department in Södertälje an evaluation of the technology gaze interaction has been done. The aim was to see if the technology was suitable for implementation in a truck environment and what potential it had. The work started by doing a context analysis to get a deeper knowledge of the research done on within the area related to the subject. Following the context analysis a comprehensive need finding process was done. In this process, data from interviews, observations, ride along with truck drivers, benchmarking and more was analysed. The analysis of this was used to identify the user needs. Based on the user needs the concept development phase was conducted. The whole development phase was done in different stages and started off by an idea generation process. The work flow was made in small iterations with the idea to continuously improve the concepts. All concepts were evaluated in a concept scoring chart to see which of the concepts that best fulfilled the concept specifications. The concepts that best could highlight the techniques strengths and weaknesses were chosen and these are Head Up Display Interaction and Gaze Support System.. These concepts focused on the interaction part of the technique rather than a specific function. Test of the two concepts were conducted in a simulator to get data and see how they performed compared to today´s Scania trucks. The result overall was good and the test subjects were impressed with the systems. However there was no significance in most of the cases of driving except for some conditions where the concepts prove to be better than the systems used today. Gaze interaction is a technology that is suitable for a truck driving environment given that a few slight improvements are made. Implementation of the concepts have a good potential of reducing road accidents caused by human errors. 

    Ladda ner fulltext (pdf)
    Gaze Interaction in Modern Trucks
  • 102.
    Fredriksson, Anna
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Kommunikations- och transportsystem. Linköpings universitet, Tekniska fakulteten.
    Malm, Anna
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten. Saab Aeronautics, Linköping, Sweden.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    What are the differences between related offset and outsourcing?: A case study of a related offset business at Saab2016Ingår i: International Journal of Technology Transfer and Commercialisation, ISSN 1470-6075, E-ISSN 1741-5284, Vol. 14, nr 2, s. 132-149Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Recently, offset contracts have become more complex. For the seller to carry through and review the effects and the demands of an offset contract, they need a framework.The paper identifies five main differences between outsourcing and related offset, which are translated into activities to be included in a suggested related offset framework. The paper is based on an in-depth case study of a related offset business at Saab, a Swedish military aircraft producer. The analysis compared the studied case with an existing outsourcing process identified in literature. The paper contributes by providing an overview of the activities taking place during a related offset process and showing the effect of the different hierarchical levels involved in the process on the efficiency of the fulfilment of the offset business. This paper is based on a single case study, and the suggested differences should be verified through further case studies.

  • 103.
    Friman, Klara
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Designing a sustainable product from electronic plastic waste: A study in how an environmentally friendly product can be developed with a discarded material as the starting point2014Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The aim of the thesis was to show that it is possible to develop a sustainable product of a discarded material and provide a framework for how to do that. A great amount of discarded material is today put on landfill due to its low value and difficulties to use. But putting the waste on landfill is the least preferred way of handling it, especially when the resources in the world are not infinite. It is therefore of importance that we find another way of handling the discarded material, which is why this thesis was written. 

    During the work has a qoute by McDonough and Braungart (2002) been kept in mind, reminding us, as product designers,  of the responsibilty we have  for future generations well-being. 

    “How can we love the children of all species– not just our own – for all time?” – McDonough and Braungart. 2002. Remaking the way we want things, pp 168.

    This thesis consisted of three phases. In phase 1 the plastic WEEEBR (a recycled plastic blend from waste from electrical and electronic equipment) was evaluated and a suitable product for it was found. Phase 2 started with a market research trying to find a market opportunity for that product. Thereafter several concepts for the product was developed. The last phase, phase 3, analyzed and evaluated the two previous phases in order to summarize the process and develop a method for how to put requirements on future products.  

    Phase 1 and 2 are shortly described, thereafter follows the analysis of them. The proposed method are exemplified with concepts and results from phase 1 and 2. The result of the thesis was a method based on following 6 steps:

    1. Agree to the company’s vision
    2. Evaluate what available material you have
    3. Evaluate your technical possibilites with the material
    4. Highlight a market possibility
    5. Set product requirements
    6. Develop the concept

    This method is generic and shall be used as a guide when developing sustainable products. Developing sustainable products include thinking about what material you have. It is worth thinking about if the product shall be produced locally, with local material and also how the material should be handled after it is used and at last where it ends up. 

    Ladda ner fulltext (pdf)
    Designing a sustainable product from electronic plastic waste
  • 104.
    Furu, Micke
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Konstruktion av vertikaltransportör för materialhantering2012Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Rotab Rostfria Transportörer AB tillverkar och utvecklar material- och godshanteringsutrustning. Företaget levererar även kompletta materialhanteringslösningar i form av godshanteringsanläggningar som ofta består av transportband och paketeringsutrustning.

    Examensarbetets mål är att utveckla en vertikaltransportör som ska transportera gods mellan två transportband belägna på olika höjder, transporten ska kunna varieras mellan 1000 - 3000 mm. Transportören ska undvika de två stora nackdelarna som återfinns hos konkurrerande produkter, att de är utrymmeskrävande eller att de använder sig av synkroniserade kedjor. Vertikaltransportören baseras på en konceptidé som tagits fram på företaget. Denna konceptidé utvecklas till en prototyp med hjälp av metoder för produktutveckling. Produktutvecklingsprocessen delas upp i olika faser som inleds med en problemdefinierande fas. Därefter definieras produktens önskade funktioner, detta används till att utveckla ett flertal koncept. Ett av koncepten väljs ut för vidareutveckling. Utifrån det valda konceptet konstrueras en prototyp som används för underlag till en utvärdering.

    Vid examensarbetets slut har en digital prototyp konstruerats i CAD-programmet (Computer Aided Design) SpaceClaim. Konstruktionen är dimensionerad för att hantera gods med dimensionerna (

    längd x bredd x höjd) 400x400x300 mm samt en godsvikt upp till 20 kg. Den drivs av en elektrisk kuggväxelmotor med 0,55 kW:s effekt. Den lägsta möjliga hämthöjden är 800 mm över golvet. Prototypens högsta avlämningshöjd är 3490 mm över golvet, detta kan dock ökas vid behov. Prototypen klarar av 39,5 transporter i minuten.

    Prototypen är ett bra val för vertikala transporter av gods i den storleksordning som den är dimensionerad för att hantera. Dock är den sämre på att hantera gods i mindre storleksordning. Prototypen bör tillämpas då godset behöver förflyttas vertikalt och endast ta en kort horisontell sträcka i anspråk. I de fall där, den långa horisontella sträcka som krävs av, en vinkeltransportör ryms bör istället en sådan tillämpas. Då vinkeltransportören har en högre transportkapacitet, simplare konstruktion och lägre kostnad.

    Ladda ner fulltext (pdf)
    fulltext
  • 105.
    Gagiu, Răzvan-Florin-Rainer
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Abin, Kakkattil Paulose
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Modeling and Simulation of novel Environmental Control System for a combat aircraft2018Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The present thesis deals with the analysis of Environmental Control System (ECS) as a part of the aircraft conceptual design. The research focuses on developing methods for modelling, simulation and optimization of current and future cooling technologies suitable for aircraft applications. The work started with a pre-study in order to establish the suitability of different cooling technologies for ECS application. Therefore, five technologies namely, Bootstrap (BS), Reverse-Bootstrap (RBS), vapour cycle system (VCS), magnetic cooling (MC) and thermo-electric cooling (EC), were assessed from a theoretical point of view by the method of benchmarking. This resulted into the selection of three most suitable technologies that were further modelled and simulated in Dymola. In order to compare the optimum designs for each technology, the models were optimized using the modeFRONTIER software. The comparison was performed based on the optimum ratio of maximum power of cooling and minimum fuel penalty. The results showed that VCS has the “best” performances compared to BS and RBS. In addition to the active technologies, passive cooling methods such as liquid cooling by means of jet-fuel and poly-alpha-olefin were considered to address high heat transfer rates. In order to apply the cooling technologies in the ECS, concept system architectures were formulated using the functional analysis. This led to the identification of basic functions, components and sub-systems interaction. Based on the comparison carried out previously and the functional analysis, two ECS architectures were developed. Design optimization procedure was applied further in order to assess each concept and also to study the differences between the two concept architectures. The results depict the complex interaction of different key parameters of the architectures and their influence on the outcome. The study culminated with a proposed methodology for formulation of systems architecture using information from the optimization results and a robust functional analysis method. To sum up, the thesis proposes a simulation-based optimization method that allows inclusion of ECS system in aircraft conceptual design phase. The study also proves the complexity of the conceptual design stage for ECS architectures which highly influences the design of the combat aircraft.

    Ladda ner fulltext (pdf)
    Master Thesis Aircraft Conceptual Design
  • 106.
    Gavel, Hampus
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Fuel Transfer System in the Conceptual Design Phase2002Ingår i: SAE World Aviation congress and Display, Phoenix, USA paper 2002-01-2931, 2002, nr 2002-01-2931Konferensbidrag (Refereegranskat)
    Abstract [en]

    As the time between different development projects of new aircraft (a/c) extends, experienced personnel in the field of basic a/c system design are difficult to employ when being on the onset of a new design. Further on basic a/c system design is a field neglected in literature and in the educational system.

    A text is under development that summarizes the Saab experience of the complete fuel system design with respect to the fighter a/c Viggen and Gripen, the commuter a/c 340 and 2000, the trainer a/c SK60 and also the conceptual a/c B3LA.

    This paper is an extract of this text and describe early considerations that have to be made when designing a fuel transfer system. Emphasis is put on the top requirements on a/c level.

  • 107. Beställ onlineKöp publikationen >>
    Gavel, Hampus
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    On aircraft fuel systems: conceptual design and modeling2007Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    The largest and most important fluid system in an aircraft is the fuel system. Obviously, future aircraft projects involve the design of fuel system to some degree. In this project design methodologies for aircraft fuel systems are studied, with the aim to shortening the system development time.

    This is done by means of illustrative examples of how optimization and the use of matrix methods, such as the morphological matrix, house of quality and the design structure matrix, have been developed and implemented at Saab Aerospace in the conceptual design of aircraft fuel systems. The methods introduce automation early in the development process and increase understanding of how top requirements regarding the aircraft level impact low-level engineering parameters such as pipe diameter, pump size, etc. The morphological matrix and the house of quality matrix are quantified, which opens up for use of design optimization and probabilistic design.

    The thesis also discusses a systematic approach when building a large simulation model of a fluid system where the objective is to minimize the development time by applying a strategy that enables parallel development and collaborative engineering, and also by building the model to the correct level of detail. By correct level of detail is meant the level that yields a simulation outcome that meets the stakeholders’ expectations. The experienced gained at Saab in building a simulation model, mainly from the Gripen fuel system, but also the accumulated experience from other system models, is condensed and fitted into an overall process.

    Delarbeten
    1. Conceptual Design of a New Generation JAS 39 Gripen Aircraft
    Öppna denna publikation i ny flik eller fönster >>Conceptual Design of a New Generation JAS 39 Gripen Aircraft
    2006 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    This paper describes the conceptual phase of a modification proposal for Saab Gripen, which aims to create the best possible basis for future aircraft development. One of the main tasks in this respect is to investigate different means to extend range. This paper describes the technical outcome from the concept generation, concept selection, and concept refinement at system and airframe level. The chosen concept involves relocation and redesign of the main landing gear. The original main landing gear bay is converted into fuel tanks. The relocation of the main gear enables a new ventral twin store carriage with supersonic jettison capability to be introduced. The concept proposal yields the following improvements:

    · Increased range due to increased fuel capability

    · Increased maximum allowed takeoff weight due to beefe d-up main gear

    · Increased weapon flexibility and capability due to introduction of two new ventral store

    · Introducing supersonic jettison capability

    The paper also includes a description of how the work is related to the overall design process in general and the conceptual phase in particular, as described in design methodology literature.

    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12980 (URN)10.2514/6.2006-31 (DOI)
    Konferens
    44th AIAA Aerospace Sciences Meeting and Exhibit, Reno, USA
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01 Senast uppdaterad: 2013-11-07
    2. Strategy for Modeling of large A/C fluid systems
    Öppna denna publikation i ny flik eller fönster >>Strategy for Modeling of large A/C fluid systems
    Visa övriga...
    2004 (Engelska)Ingår i: World Aviation Congress and Display, WAC-04, SAE Technical Paper 2004-01-3093, 2004, s. 1495-1506Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    There is an ongoing trend in the European Military a/c industry towards cooperation between nations when purchasing and between manufacturers when developing and producing a/c. Different manufacturers at different locations develop different parts or sub-systems. When using this approach a vital part of a fast and precise system evaluation is the use of simulation models. In order to stay competitive it is not only sufficient to be able to build large simulation models but also to do it fast.

    This paper describes the conclusions regarding a modelling strategy of large fluid systems drawn from the building of a simulation model of the JAS 39 Gripen fuel system. An overall process is suggested into which the activities of building a model are fitted. This is however not the main objective; it is more important to identify the different issues and activities at the engineering level. If these are properly dealt with, the model development time will be reduced, if not, the wrong model may be designed. "Wrong" here means a model that does not do the job, or solves a problem other than the one intended by the stakeholder.

    Serie
    SAE technical paper series, ISSN 0148-7191 ; 3093
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12981 (URN)10.4271/2004-01-3093 (DOI)
    Konferens
    World Aviation Congress and Display, WAC-04, Reno, USA
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01 Senast uppdaterad: 2014-01-21Bibliografiskt granskad
    3. An Algorithmic Morphology Matrix for Aircraft Fuel System Design
    Öppna denna publikation i ny flik eller fönster >>An Algorithmic Morphology Matrix for Aircraft Fuel System Design
    2006 (Engelska)Ingår i: 25th Congress of the International Council of the Aeronautical Sciences, Hamburg, Germany, 2006, nr ICAS-2006-9.2.2Konferensbidrag, Publicerat paper (Refereegranskat)
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12982 (URN)
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01 Senast uppdaterad: 2009-03-02
    4. Aircraft fuel system synthesis aided by interactive morphology and optimization
    Öppna denna publikation i ny flik eller fönster >>Aircraft fuel system synthesis aided by interactive morphology and optimization
    2007 (Engelska)Ingår i: 45th AIAA Aerospace Sciences Meeting and Exhibit, Reno, USA, Reno,USA: AIAA , 2007, nr AIAA-2007-0653Konferensbidrag, Publicerat paper (Refereegranskat)
    Ort, förlag, år, upplaga, sidor
    Reno,USA: AIAA, 2007
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12983 (URN)
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01 Senast uppdaterad: 2009-04-28
    5. Quantification of the Elements in the Relationship matrix: A conceptual study of Aircraft Fuel System
    Öppna denna publikation i ny flik eller fönster >>Quantification of the Elements in the Relationship matrix: A conceptual study of Aircraft Fuel System
    2004 (Engelska)Ingår i: 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, USA, paper AIAA-2004-0538, 2004, nr AIAA-2004-0538, s. 5244-5252Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    This paper describes how the framework of thc house of quality and design structure matrices are used to visualizee dependencies between top level requirements and engineering design properties. It is also discussed how quantification of the matrix elements may increase the understanding of how the top-level requirements impacts the low-level design parameters. lndeed, history has shown that overlooking combinatory effects between subsystems and night conditions may become expensive. Not only in terms of not goning getting the sizing right but more so if an entirely wrong concept is chosen.

    This paper shows a matrix technique that has successfully been used at Saab and how this technique may facilitate the cconcept evaluation process of early fuel system design.

    The matrix method aids the designer to take alk the relevant aspects into account when evaluating a design. Use of the method will also increase the understanding of what top-level requirement or combination thereof, which drives the choice of one particular concept rather than the other. The understanding of how the top-level requiremEnts impacts low level design parameters such as pump size or pipe diameter will also increse.

    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12984 (URN)10.2514/6.2004-538 (DOI)
    Konferens
    42nd AIAA Aerospace Sciences Meeting and Exhibit, 5-8 Januari, Reno, USA
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01 Senast uppdaterad: 2014-01-21Bibliografiskt granskad
    6. Probabilistic design in the conceptual phase of an aircraft fuel system
    Öppna denna publikation i ny flik eller fönster >>Probabilistic design in the conceptual phase of an aircraft fuel system
    2005 (Engelska)Ingår i: 7th AIAA Non-Deterministic Design Forum, Austin, USA, 2005, nr AIAA-2005-2219Konferensbidrag, Publicerat paper (Refereegranskat)
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12985 (URN)
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01 Senast uppdaterad: 2009-03-02
    7. Optimal Conceptual Design of Aircraft Fuel Transfer Systems
    Öppna denna publikation i ny flik eller fönster >>Optimal Conceptual Design of Aircraft Fuel Transfer Systems
    2006 (Engelska)Ingår i: Journal of Aircraft, ISSN 0021-8669, Vol. 43, nr 5, s. 1334-1340Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

     

    This paper describes early considerations that have to be made when designing an aircraft fuel system. Emphasis is placed on illustrating the impact of top-level aircraft requirements on low-level practicalities such as fuel system design. Choosing between concepts is one of the most critical parts of any design process. Different concepts have different advantages, and the concept that is the best choice is often dependent on the top-level requirements. This paper shows how optimization has been used successfully at Saab Aerospace as a tool that supports concept selection. The example studied is the design of a fuel transfer system for a ventral drop tank and the optimization results in different conceptual designs depending on the top-level requirements.

     

    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12986 (URN)10.2514/1.19548 (DOI)
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01 Senast uppdaterad: 2009-03-02
    8. Fuel Transfer System in the Conceptual Design Phase
    Öppna denna publikation i ny flik eller fönster >>Fuel Transfer System in the Conceptual Design Phase
    2002 (Engelska)Ingår i: SAE World Aviation congress and Display, Phoenix, USA paper 2002-01-2931, 2002, nr 2002-01-2931Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    As the time between different development projects of new aircraft (a/c) extends, experienced personnel in the field of basic a/c system design are difficult to employ when being on the onset of a new design. Further on basic a/c system design is a field neglected in literature and in the educational system.

    A text is under development that summarizes the Saab experience of the complete fuel system design with respect to the fighter a/c Viggen and Gripen, the commuter a/c 340 and 2000, the trainer a/c SK60 and also the conceptual a/c B3LA.

    This paper is an extract of this text and describe early considerations that have to be made when designing a fuel transfer system. Emphasis is put on the top requirements on a/c level.

    Serie
    SAE technical paper series, ISSN 0148-7191
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12987 (URN)10.4271/2002-01-2931 (DOI)
    Konferens
    SAE World Aviation congress and Display, November 5-7, Phoenix, USA
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01 Senast uppdaterad: 2014-01-21Bibliografiskt granskad
    9. Using Optimization as a Tool in Fuel System Conceptual Design
    Öppna denna publikation i ny flik eller fönster >>Using Optimization as a Tool in Fuel System Conceptual Design
    2003 (Engelska)Ingår i: SAE World Aviation Congress and Display, Montreal, Canada, SAE Technical Paper 2003-01-3054, 2003, nr 2003-01-3052Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    Choosing between concepts is often the most critical part of the design process. Different concepts have different advantages and disadvantages. The concept that is the best choice is most often dependent on the top level requirements. Sometimes there may also be a trade off between concept choice and the top requirements. In aircraft (a/c) fuel system design it has often proved difficult to find the switching point where the superior concept is changed. This sometimes makes the designer conservative and leads to the selection of a concept with too high a penalty. There is also a risk for the opposite and perhaps worse scenario: That the designer strives to reduce weight and cost and therefore, accidentally, chooses an under achieving concept and thus induces large downstream cost if late redesign or retro modifications are necessary.

    This paper shows how optimization has been successfully used at Saab Aerospace as a tool that supports concept selection. The example shown is the choice of fuel transfer method for a ventral drop tank. The example also illustrates the impact of top-level requirements on low-level practicalities such as fuel system design.

    Serie
    SAE Technical Paper
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12988 (URN)10.4271/2003-01-3054 (DOI)
    Konferens
    SAE World Aviation Congress and Display, WAC 03, September 8-12, Montreal, Canada
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01 Senast uppdaterad: 2014-01-21Bibliografiskt granskad
    10. Modeling and Simulation of Gripen’s Fluid Power Systems
    Öppna denna publikation i ny flik eller fönster >>Modeling and Simulation of Gripen’s Fluid Power Systems
    Visa övriga...
    2004 (Engelska)Ingår i: Recent advances in aerospace actuation systems and components, Toulouse, France, 2004Konferensbidrag, Publicerat paper (Refereegranskat)
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-12989 (URN)
    Tillgänglig från: 2008-04-01 Skapad: 2008-04-01
    Ladda ner fulltext (pdf)
    FULLTEXT01
    Ladda ner (pdf)
    COVER01
  • 108.
    Gavel, Hampus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Andersson, Johan
    Linköpings universitet, Institutionen för konstruktions- och produktionsteknik. Linköpings universitet, Tekniska högskolan.
    Using Optimization as a Tool in Fuel System Conceptual Design2003Ingår i: SAE World Aviation Congress and Display, Montreal, Canada, SAE Technical Paper 2003-01-3054, 2003, nr 2003-01-3052Konferensbidrag (Refereegranskat)
    Abstract [en]

    Choosing between concepts is often the most critical part of the design process. Different concepts have different advantages and disadvantages. The concept that is the best choice is most often dependent on the top level requirements. Sometimes there may also be a trade off between concept choice and the top requirements. In aircraft (a/c) fuel system design it has often proved difficult to find the switching point where the superior concept is changed. This sometimes makes the designer conservative and leads to the selection of a concept with too high a penalty. There is also a risk for the opposite and perhaps worse scenario: That the designer strives to reduce weight and cost and therefore, accidentally, chooses an under achieving concept and thus induces large downstream cost if late redesign or retro modifications are necessary.

    This paper shows how optimization has been successfully used at Saab Aerospace as a tool that supports concept selection. The example shown is the choice of fuel transfer method for a ventral drop tank. The example also illustrates the impact of top-level requirements on low-level practicalities such as fuel system design.

  • 109.
    Gavel, Hampus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Andersson (Ölvander), Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Johansson (Lundén), Björn
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    An Algorithmic Morphology Matrix for Aircraft Fuel System Design2006Ingår i: 25th Congress of the International Council of the Aeronautical Sciences, Hamburg, Germany, 2006, nr ICAS-2006-9.2.2Konferensbidrag (Refereegranskat)
  • 110.
    Gavel, Hampus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Berry, Patrick
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluid och mekanisk systemteknik. Linköpings universitet, Tekniska högskolan.
    Axelsson, Arne
    Saab Aerostructures, Linköping, Sweden.
    Conceptual Design of a New Generation JAS 39 Gripen Aircraft2006Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper describes the conceptual phase of a modification proposal for Saab Gripen, which aims to create the best possible basis for future aircraft development. One of the main tasks in this respect is to investigate different means to extend range. This paper describes the technical outcome from the concept generation, concept selection, and concept refinement at system and airframe level. The chosen concept involves relocation and redesign of the main landing gear. The original main landing gear bay is converted into fuel tanks. The relocation of the main gear enables a new ventral twin store carriage with supersonic jettison capability to be introduced. The concept proposal yields the following improvements:

    · Increased range due to increased fuel capability

    · Increased maximum allowed takeoff weight due to beefe d-up main gear

    · Increased weapon flexibility and capability due to introduction of two new ventral store

    · Introducing supersonic jettison capability

    The paper also includes a description of how the work is related to the overall design process in general and the conceptual phase in particular, as described in design methodology literature.

  • 111.
    Gavel, Hampus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Andersson, Johan
    Linköpings universitet, Institutionen för konstruktions- och produktionsteknik, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Quantification of the Elements in the Relationship matrix: A conceptual study of Aircraft Fuel System2004Ingår i: 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, USA, paper AIAA-2004-0538, 2004, nr AIAA-2004-0538, s. 5244-5252Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper describes how the framework of thc house of quality and design structure matrices are used to visualizee dependencies between top level requirements and engineering design properties. It is also discussed how quantification of the matrix elements may increase the understanding of how the top-level requirements impacts the low-level design parameters. lndeed, history has shown that overlooking combinatory effects between subsystems and night conditions may become expensive. Not only in terms of not goning getting the sizing right but more so if an entirely wrong concept is chosen.

    This paper shows a matrix technique that has successfully been used at Saab and how this technique may facilitate the cconcept evaluation process of early fuel system design.

    The matrix method aids the designer to take alk the relevant aspects into account when evaluating a design. Use of the method will also increase the understanding of what top-level requirement or combination thereof, which drives the choice of one particular concept rather than the other. The understanding of how the top-level requiremEnts impacts low level design parameters such as pump size or pipe diameter will also increse.

  • 112.
    Gavel, Hampus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Andersson (Ölvander), Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Johansson (Lundén), Björn
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Probabilistic design in the conceptual phase of an aircraft fuel system2005Ingår i: 7th AIAA Non-Deterministic Design Forum, Austin, USA, 2005, nr AIAA-2005-2219Konferensbidrag (Refereegranskat)
  • 113.
    Gavel, Hampus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan. Saab Aerospace, Sweden.
    Lantto, Birgitta
    Saab Aerospace, Sweden.
    Ellström, Hans
    Saab Aerospace, Sweden.
    Jareland, Martin
    Saab Aerospace, Sweden.
    Steinkellner, Sören
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska högskolan.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Andersson (Ölvander), Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska högskolan.
    Strategy for Modeling of large A/C fluid systems2004Ingår i: World Aviation Congress and Display, WAC-04, SAE Technical Paper 2004-01-3093, 2004, s. 1495-1506Konferensbidrag (Refereegranskat)
    Abstract [en]

    There is an ongoing trend in the European Military a/c industry towards cooperation between nations when purchasing and between manufacturers when developing and producing a/c. Different manufacturers at different locations develop different parts or sub-systems. When using this approach a vital part of a fast and precise system evaluation is the use of simulation models. In order to stay competitive it is not only sufficient to be able to build large simulation models but also to do it fast.

    This paper describes the conclusions regarding a modelling strategy of large fluid systems drawn from the building of a simulation model of the JAS 39 Gripen fuel system. An overall process is suggested into which the activities of building a model are fitted. This is however not the main objective; it is more important to identify the different issues and activities at the engineering level. If these are properly dealt with, the model development time will be reduced, if not, the wrong model may be designed. "Wrong" here means a model that does not do the job, or solves a problem other than the one intended by the stakeholder.

  • 114.
    Gavel, Hampus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Ölvander Andersson, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Johansson Lundén, Björn
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Aircraft fuel system synthesis aided by interactive morphology and optimization2007Ingår i: 45th AIAA Aerospace Sciences Meeting and Exhibit, Reno, USA, Reno,USA: AIAA , 2007, nr AIAA-2007-0653Konferensbidrag (Refereegranskat)
  • 115.
    Gavel, Hampus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Ölvander (Andersson), Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Optimal Conceptual Design of Aircraft Fuel Transfer Systems2006Ingår i: Journal of Aircraft, ISSN 0021-8669, Vol. 43, nr 5, s. 1334-1340Artikel i tidskrift (Refereegranskat)
    Abstract [en]

     

    This paper describes early considerations that have to be made when designing an aircraft fuel system. Emphasis is placed on illustrating the impact of top-level aircraft requirements on low-level practicalities such as fuel system design. Choosing between concepts is one of the most critical parts of any design process. Different concepts have different advantages, and the concept that is the best choice is often dependent on the top-level requirements. This paper shows how optimization has been used successfully at Saab Aerospace as a tool that supports concept selection. The example studied is the design of a fuel transfer system for a ventral drop tank and the optimization results in different conceptual designs depending on the top-level requirements.

     

  • 116.
    Gavel, Hampus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Ölvander, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    A quantified and interactive relationship matrix applied to aircraft fuel system conceptual design2010Ingår i: International Review of Aerospace Engineering (IREASE), ISSN 1973-7459, E-ISSN 1973-7440, Vol. 3, nr 1, s. 9-18Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper describes how the House of Quality matrix has been quantified for use in conceptual design. The House of Quality matrix is used for visualizing the relationships between subsystem design parameters and top-level requirements. The idea is then to insert quantified values of the subsystems’ characteristics as coupling elements, thus visualizing both the requirements-subsystems relationship and system performance. Here, a spreadsheet program (MS Excel) with a built-in modeling/solver tool has been used to model the subsystems. This makes the matrix interactive, thus facilitating trade studies between requirements and system design. By adding probabilistic analysis it is possible to explore the entire range of system behavior early on, rather than just focusing on one or more worst case scenarios as has previously often been the case, and thus promoting the selection of more optimal solutions. The quantitative approach also opens up for mathematically formal optimization which has been exploited by deriving Pareto fronts for visualization of conflicting objectives, one such objective being. The design application used as illustrative example is conceptual design of an aircraft fuel system.

  • 117.
    Gavel, Hampus
    et al.
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Ölvander, Johan
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Krus, Petter
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    A quantified relationship matrix aided by optimization and probabilistic design2008Ingår i: 26th Congress of the International Council of the Aeronautical Sciences,2008, Anchorage: ICAS , 2008Konferensbidrag (Refereegranskat)
  • 118.
    Gopinath, Varun
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Industrial Silo Optimization2011Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This thesis aims to build a working design-analyze-optimize methodology for Alstom Power Sweden AB at Växjö, Sweden. In order to be profitable in today’s competitive industrial product market, it is necessary to engineer optimized products fast. This involves CAD design and FEA analysis to work within an optimization routine in a seamless fashion which will result in a more profitable product.

    This approach can be understood as a model-based design, where the 3D CAD data is central to the product life cycle. The present approach provides many benefits to a company because of the use of a central database ensure access to the latest release of the 3D model. This allows for a streamlined design to fabrication life cycle with inputs from all departments of a product based company.

    Alstom is looking into automating some of their design process so as to achieve efficiency within their design department. This report is the result of a study where an industrial silo is taken as an example. A design loop involving CAD design and FE analysis is built to work with an optimization routine to minimize the mass and also ensure structural stiffness and stability.

    Most engineers work with a lot of constraints with regard to material stock size and other design codes (e.g. Euro Codes). In this report an efficient way to design an industrial product in a 3D CAD (CATIA) program so as to stay within these constrains and still obtain credible computation results within an optimization loop will be discussed.

    Ladda ner fulltext (pdf)
    Industrial Silo Optimization
  • 119.
    Gopinath, Varun
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    On Safe Collaborative Assembly With Large Industrial Robots2019Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    This thesis pertains to industrial safety in relation to human-robot collaboration. The aim is to enhance understanding of the nature of systems where large industrial robots collaborate with humans to complete assembly tasks. This understanding may support development and safe operations of future collaborative systems.

    Industrial robots are widely used to automate manufacturing operations across several industries. The automotive industry is the largest user of robots and have identified robot-based automation as a strategy to improve efficiency in manufacturing operations.

    Recently, a class of machines referred to as collaborative robots have been developed by robot manufacturers to support operators in assembly tasks. The use of these robots to support human workers in an industrial context are referred to as collaborative operations.

    Presently, collaborative robots have limited reach and load carrying capacity compared to standard industrial robots. Large/standard industrial robots are widely used for applications such as welding or painting. They can, in principle support operators in assembly tasks as well.

    Two laboratory demonstrators representing the final results from a series of research activities will be presented. They were developed to investigate issues related to personnel and process safety while working with large industrial robots in collaborative operations. The demonstrators were partially based on assembly workstations that are currently operational and they exemplify challenges faced by the automotive industry.

    Demonstrator-based Research, a methodology for collaborative research that emphasizes development of demonstrators as a research tool, forms the rationale for carrying out research operations presented in this thesis. An evaluation of the laboratory demonstrators by industrial participants suggests an increased interest and confidence in collaborative operations with large robots. The demonstrators have served as a tentative platform for participants to identify and discuss manufacturing and safety challenges in relation to their organization.

    A main outcome presented in this thesis relates to specifying requirements for introducing robots in a human-populated environment. Introducing robotic systems in new environments requires reconsideration of the nature of the hazards particular to the domain. An analysis of the laboratory demonstrators suggest that, in addition to hazards associated with normal functioning of the system, limitations in human cognition must be considered. These results will be exemplified and discussed in the context of situational and mode awareness. Additionally, a model of a collaborative workstation will be presented in terms of three constituents – workspace, tasks and interaction.

    This is particularly significant considering the direction of present-day research aimed at introducing robots across various industries and working environments. In response to this trend, this thesis discusses the relevance of Interactive Research and its emphasis on joint learning that goes on between academic researchers and industrial participants as a valuable principle for collaborative research.

    Delarbeten
    1. Design Criteria for a Conceptual End-effector for Physical Human-Robot Production Cell
    Öppna denna publikation i ny flik eller fönster >>Design Criteria for a Conceptual End-effector for Physical Human-Robot Production Cell
    2014 (Engelska)Ingår i: Proceedings of The 6th International Swedish Production Symposium 2014, Gothenburg: Chalmers Conferences , 2014, s. 1-7Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    Speed, precision and repeatability are virtues of industrial robots which are relied on by manufacturing firms but also necessitates segregating them within controlled fenced areas. Therefore, industrial robots cannot cooperate with line workers in assembling task. With recent developments in robotics, new possibilities have emerged that can enable manufacturing firms to be flexible and cost effective. This paper presents preliminary results from investigations into the possibility of a man-machine production cell where plastic panels are assembled under the car. A conceptual man-machine collaborative production cell will be presented detailing characteristics required to ensure safety.

    Ort, förlag, år, upplaga, sidor
    Gothenburg: Chalmers Conferences, 2014
    Nyckelord
    Human-Robot Collaboration, Mixed-model assembly Line, Flexible Manufacturing.
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-123649 (URN)9789198097412 (ISBN)
    Konferens
    The 6th Swedish Production Symposium, Clarion Hotel Post September 16-18, Gothenburg, Sweden
    Projekt
    Collaborative Team of Man and Machine ToMM
    Forskningsfinansiär
    Vinnova
    Tillgänglig från: 2016-01-04 Skapad: 2016-01-04 Senast uppdaterad: 2019-11-20Bibliografiskt granskad
    2. Risk Assessment Process for Collaborative Assembly - A Job Safety Analysis Approach
    Öppna denna publikation i ny flik eller fönster >>Risk Assessment Process for Collaborative Assembly - A Job Safety Analysis Approach
    2016 (Engelska)Ingår i: 6TH CIRP CONFERENCE ON ASSEMBLY TECHNOLOGIES AND SYSTEMS (CATS), ELSEVIER SCIENCE BV , 2016, Vol. 44, s. 199-203Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    International safety standards state that risk assessment is the first step in understanding and eliminating hazardous work environment. The traditional method of risk assessment using Job Safety Analysis, where sequential tasks of the operator are analysed for potential risks, needs to be adapted to applications where humans and robots collaborate to complete assembly tasks. This article proposes a novel approach by placing equal emphasis on various participants working within their workspaces. An industrial case study wil be used to showcase the merits of the process when used at an early stage in the development of a collaborative assembly cell. (C) 2016 The Authors. Published by Elsevier B.V.

    Ort, förlag, år, upplaga, sidor
    ELSEVIER SCIENCE BV, 2016
    Serie
    Procedia CIRP, ISSN 2212-8271
    Nyckelord
    Human Robot Collaboration; Risk Assessment; Safety Standards; Collaborative Assembly
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-129505 (URN)10.1016/j.procir.2016.02.334 (DOI)000376432200033 ()
    Konferens
    6th CIRP Conference on Assembly Technologies and Systems (CATS)
    Tillgänglig från: 2016-06-20 Skapad: 2016-06-20 Senast uppdaterad: 2019-11-20
    3. Safe Assembly Cell Layout through Risk Assessment: An Application with Hand Guided Industrial Robot
    Öppna denna publikation i ny flik eller fönster >>Safe Assembly Cell Layout through Risk Assessment: An Application with Hand Guided Industrial Robot
    2017 (Engelska)Ingår i: Proceedings of the 50th CIRP Conference on Manufacturing Systems / [ed] Mitchell M. Tseng, Hung-Yin Tsai and Yue Wang, Elsevier, 2017, Vol. 63, nr Supplement C, s. 430-435Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    Risk assessment is a systematic and iterative process which involves risk analysis where the probable hazards are identified and corresponding risks are evaluated along with solutions to mitigate the effect of these risks. In this article the outcome of a risk assessment process will be detailed where a large industrial robot is being used as a intelligent and flexible lifting tool that can aid operators in assembly tasks. The realization of a collaborative assembly station has several benefits such as increased productivity and improved ergonomic work environment. The article will detail the design of the layout of a collaborative assembly cell which takes into account the safety and productivity concerns of automotive assembly plants.

    Ort, förlag, år, upplaga, sidor
    Elsevier, 2017
    Serie
    Procedia CIRP
    Nyckelord
    Human Robot Collaboration, Safety Standards, Collaborative Assembly, Hand-Guided Robot
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-142319 (URN)10.1016/j.procir.2017.03.160 (DOI)000418465500073 ()2-s2.0-85028677171 (Scopus ID)
    Konferens
    Manufacturing Systems 4.0 – Proceedings of the 50th CIRP Conference on Manufacturing Systems
    Forskningsfinansiär
    VINNOVA
    Anmärkning

    Manufacturing Systems 4.0 – Proceedings of the 50th CIRP Conference on Manufacturing Systems

    Tillgänglig från: 2017-10-25 Skapad: 2017-10-25 Senast uppdaterad: 2019-11-20Bibliografiskt granskad
    4. Risk Assessment for Collaborative Operation: A Case Study on Hand-Guided Industrial Robots
    Öppna denna publikation i ny flik eller fönster >>Risk Assessment for Collaborative Operation: A Case Study on Hand-Guided Industrial Robots
    2018 (Engelska)Ingår i: Risk Assessment / [ed] Valentina Svalova, London/Rijeka: InTech, 2018, s. 167-187Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Risk assessment is a systematic and iterative process, which involves risk analysis, where probable hazards are identified, and then corresponding risks are evaluated along with solutions to mitigate the effect of these risks. In this article, the outcome of a risk assessment process will be detailed, where a large industrial robot is used as an intelligent and flexible lifting tool that can aid operators in assembly tasks. The realization of a collaborative assembly station has several benefits, such as increased productivity and improved ergonomic work environment. The article will detail the design of the layout of a collaborative assembly workstation, which takes into account the safety and productivity concerns of automotive assembly plants. The hazards associated with hand-guided collaborative operations will also be presented.

    Ort, förlag, år, upplaga, sidor
    London/Rijeka: InTech, 2018
    Nyckelord
    Hand-guided robots, industrial system safety, collaborative operations, human-robot collaboration, risk assessment, hazards
    Nationell ämneskategori
    Maskinteknik
    Identifikatorer
    urn:nbn:se:liu:diva-145504 (URN)10.5772/intechopen.70607 (DOI)9789535137986 (ISBN)9789535140634 (ISBN)9789535137993 (ISBN)
    Tillgänglig från: 2018-03-02 Skapad: 2018-03-02 Senast uppdaterad: 2019-11-20Bibliografiskt granskad
    5. Demonstrators to support research in Industrial safety - A Methodology
    Öppna denna publikation i ny flik eller fönster >>Demonstrators to support research in Industrial safety - A Methodology
    2018 (Engelska)Ingår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 17, s. 246-253Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Activities to support manufacturing research are carried out with the intention to gain knowledge of industrial problems and provide solutions that addresses these issues. In order for solution to be viable to the industry, research activities are carried out in close collaboration with participants from the industry, academia and research institutions. Interactive research approach motivates participants with multi-disciplinary perspective to collaborate and emphasizes joint learning in the change process. This article, presents a methodology, where participants with different expertise can collaborate to develop safety solutions. The concept of a demonstrator, which represents cumulative result of a series of research activities, is presented as a tool to showcase functioning and design intent in a collaborative research environment. The results of a pilot study, where manufacturing professionals evaluated design decisions that resulted in a demonstrator, will be presented. (C) 2018 The Authors. Published by Elsevier B.V.

    Ort, förlag, år, upplaga, sidor
    ELSEVIER SCIENCE BV, 2018
    Nyckelord
    Collaborative robots; Industrial Safety; University-Industry Collaboration; Risk Assessment
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-158894 (URN)10.1016/j.promfg.2018.10.043 (DOI)000471035200031 ()
    Konferens
    28th International Conference on Flexible Automation and Intelligent Manufacturing (FAIM2018), June 11-14, 2018, Columbus, OH, USAGlobal Integration of Intelligent Manufacturing and Smart Industry for Good of Humanity, Edited by Dušan Šormaz, Gürsel Süer, F. Frank Chen
    Anmärkning

    This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/)Peer-review under responsibility of the scientific committee of the 28th Flexible Automation and Intelligent Manufacturing(FAIM2018) Conference.

    Tillgänglig från: 2019-07-16 Skapad: 2019-07-16 Senast uppdaterad: 2019-11-20
    6. Understanding situational and mode awareness for safe human‑robot collaboration: case studies on assembly applications
    Öppna denna publikation i ny flik eller fönster >>Understanding situational and mode awareness for safe human‑robot collaboration: case studies on assembly applications
    2019 (Engelska)Ingår i: Production Engineering, ISSN 0944-6524, E-ISSN 1863-7353, Vol. 13, nr 1, s. 1-9Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    In order for humans and robots to collaborate on an assembly line, safety of operations is a prerequisite. In this article, two assembly stations where a large industrial robots collaborate with humans will be analysed with the aim to 1. determine the characteristics of hazards associated with human-robot interaction and 2. design solutions that can mitigate risks associated with these hazards. To support the aim of this article, a literature review will attempt to characterize automation and detail the problems associated with human-automation interaction. The analysis points at situational awareness and mode-awareness as contributing factors to operator and process safety. These underlying mechanisms, if recognised by the risk assessment team as hazards, can mitigate risks of operator injury or production delays. This article details the function of visual and physical interfaces that allow operators to comprehend system-state in order to avoid undesirable situations

    Ort, förlag, år, upplaga, sidor
    Springer Berlin/Heidelberg, 2019
    Nyckelord
    Situational awareness, Mode awareness, Human-robot collaboration (HRC), Industrial safety
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-160304 (URN)10.1007/s11740-018-0868-2 (DOI)000457944600001 ()2-s2.0-85058656783 (Scopus ID)
    Forskningsfinansiär
    Vinnova, 2015-03722
    Tillgänglig från: 2019-09-17 Skapad: 2019-09-17 Senast uppdaterad: 2020-03-24Bibliografiskt granskad
    Ladda ner fulltext (pdf)
    On Safe Collaborative Assembly With Large Industrial Robots
    Ladda ner (png)
    presentationsbild
  • 120.
    Gopinath, Varun
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Risk Assessment Process for Collaborative Assembly - A Job Safety Analysis Approach2016Ingår i: 6TH CIRP CONFERENCE ON ASSEMBLY TECHNOLOGIES AND SYSTEMS (CATS), ELSEVIER SCIENCE BV , 2016, Vol. 44, s. 199-203Konferensbidrag (Refereegranskat)
    Abstract [en]

    International safety standards state that risk assessment is the first step in understanding and eliminating hazardous work environment. The traditional method of risk assessment using Job Safety Analysis, where sequential tasks of the operator are analysed for potential risks, needs to be adapted to applications where humans and robots collaborate to complete assembly tasks. This article proposes a novel approach by placing equal emphasis on various participants working within their workspaces. An industrial case study wil be used to showcase the merits of the process when used at an early stage in the development of a collaborative assembly cell. (C) 2016 The Authors. Published by Elsevier B.V.

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    fulltext
  • 121.
    Gopinath, Varun
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Understanding situational and mode awareness for safe human‑robot collaboration: case studies on assembly applications2019Ingår i: Production Engineering, ISSN 0944-6524, E-ISSN 1863-7353, Vol. 13, nr 1, s. 1-9Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In order for humans and robots to collaborate on an assembly line, safety of operations is a prerequisite. In this article, two assembly stations where a large industrial robots collaborate with humans will be analysed with the aim to 1. determine the characteristics of hazards associated with human-robot interaction and 2. design solutions that can mitigate risks associated with these hazards. To support the aim of this article, a literature review will attempt to characterize automation and detail the problems associated with human-automation interaction. The analysis points at situational awareness and mode-awareness as contributing factors to operator and process safety. These underlying mechanisms, if recognised by the risk assessment team as hazards, can mitigate risks of operator injury or production delays. This article details the function of visual and physical interfaces that allow operators to comprehend system-state in order to avoid undesirable situations

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    Understanding situational and mode awareness for safe human‑robot collaboration: case studies on assembly applications
  • 122.
    Gopinath, Varun
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Andersson (Ölvander), Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Risk Assessment for Collaborative Operation: A Case Study on Hand-Guided Industrial Robots2018Ingår i: Risk Assessment / [ed] Valentina Svalova, London/Rijeka: InTech, 2018, s. 167-187Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Risk assessment is a systematic and iterative process, which involves risk analysis, where probable hazards are identified, and then corresponding risks are evaluated along with solutions to mitigate the effect of these risks. In this article, the outcome of a risk assessment process will be detailed, where a large industrial robot is used as an intelligent and flexible lifting tool that can aid operators in assembly tasks. The realization of a collaborative assembly station has several benefits, such as increased productivity and improved ergonomic work environment. The article will detail the design of the layout of a collaborative assembly workstation, which takes into account the safety and productivity concerns of automotive assembly plants. The hazards associated with hand-guided collaborative operations will also be presented.

    Ladda ner fulltext (pdf)
    Risk Assessment for Collaborative Operation: A Case Study on Hand-Guided Industrial Robots
  • 123.
    Gopinath, Varun
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Derelöv, Micael
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Demonstrators to support research in Industrial safety - A Methodology2018Ingår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 17, s. 246-253Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Activities to support manufacturing research are carried out with the intention to gain knowledge of industrial problems and provide solutions that addresses these issues. In order for solution to be viable to the industry, research activities are carried out in close collaboration with participants from the industry, academia and research institutions. Interactive research approach motivates participants with multi-disciplinary perspective to collaborate and emphasizes joint learning in the change process. This article, presents a methodology, where participants with different expertise can collaborate to develop safety solutions. The concept of a demonstrator, which represents cumulative result of a series of research activities, is presented as a tool to showcase functioning and design intent in a collaborative research environment. The results of a pilot study, where manufacturing professionals evaluated design decisions that resulted in a demonstrator, will be presented. (C) 2018 The Authors. Published by Elsevier B.V.

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    Demonstrators to support research in Industrial safety - A Methodology
  • 124.
    Gopinath, Varun
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Gustafsson, Ake
    Volvo Car Corp, Sweden.
    Axelsson, Stefan
    Volvo Car Corp, Sweden.
    Collaborative Assembly on a Continuously Moving Line - An Automotive Case Study2018Ingår i: 28TH INTERNATIONAL CONFERENCE ON FLEXIBLE AUTOMATION AND INTELLIGENT MANUFACTURING (FAIM2018): GLOBAL INTEGRATION OF INTELLIGENT MANUFACTURING AND SMART INDUSTRY FOR GOOD OF HUMANITY, ELSEVIER SCIENCE BV , 2018, Vol. 17, s. 985-992Konferensbidrag (Refereegranskat)
    Abstract [en]

    Collaborative operation is a state in which a purposely designed robot system and an operator work within a collaborative workspace. To ensure a safe working environment, safety standards suggest conducting a task-based risk assessment followed by risk reduction to reduce the risks to an acceptable level. In this article, an automotive case study will be used to understand safety issues associated with collaborative operations with large industrial robots. Based on this case study, a layout of the collaborative workstation, in terms of workspaces and tasks, which is the outcome of a risk assessment program will be presented. The first critical step in risk assessment is hazard identification, which can allow the risk assessing team to evaluate the hazards and suggest measures to mitigate the risks. Therefore, the hazards identified during the risk assessment program will also be detailed along with measures to mitigate the risks and is expected to complement our understanding of the nature of hazards associated with collaborative operations with large industrial robots. (C) 2018 The Authors. Published by Elsevier B.V.

  • 125.
    Gopinath, Varun
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Gustafsson, Åke
    Core Manufacturing Engineer, Volvo Car Coopeation,Göteborg, Sweden.
    Design Criteria for a Conceptual End-effector for Physical Human-Robot Production Cell2014Ingår i: Proceedings of The 6th International Swedish Production Symposium 2014, Gothenburg: Chalmers Conferences , 2014, s. 1-7Konferensbidrag (Refereegranskat)
    Abstract [en]

    Speed, precision and repeatability are virtues of industrial robots which are relied on by manufacturing firms but also necessitates segregating them within controlled fenced areas. Therefore, industrial robots cannot cooperate with line workers in assembling task. With recent developments in robotics, new possibilities have emerged that can enable manufacturing firms to be flexible and cost effective. This paper presents preliminary results from investigations into the possibility of a man-machine production cell where plastic panels are assembled under the car. A conceptual man-machine collaborative production cell will be presented detailing characteristics required to ensure safety.

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    Design Criteria for a Conceptual End-effector for Physical Human-Robot Production Cell
  • 126.
    Gopinath, Varun
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Ore, Fredrick
    Global Industrial Development, Scania CV AB, Södertälje, Sweden; Mälardalen University, School of Innovation, Design and Engineering, Eskilstuna, Sweden.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Safe Assembly Cell Layout through Risk Assessment: An Application with Hand Guided Industrial Robot2017Ingår i: Proceedings of the 50th CIRP Conference on Manufacturing Systems / [ed] Mitchell M. Tseng, Hung-Yin Tsai and Yue Wang, Elsevier, 2017, Vol. 63, nr Supplement C, s. 430-435Konferensbidrag (Refereegranskat)
    Abstract [en]

    Risk assessment is a systematic and iterative process which involves risk analysis where the probable hazards are identified and corresponding risks are evaluated along with solutions to mitigate the effect of these risks. In this article the outcome of a risk assessment process will be detailed where a large industrial robot is being used as a intelligent and flexible lifting tool that can aid operators in assembly tasks. The realization of a collaborative assembly station has several benefits such as increased productivity and improved ergonomic work environment. The article will detail the design of the layout of a collaborative assembly cell which takes into account the safety and productivity concerns of automotive assembly plants.

    Ladda ner fulltext (pdf)
    fulltext
  • 127.
    Gopinath, Varun
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Tarkian, Mehdi
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Ölvander, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Gaziza, William
    TEMPLATE DRIVEN CONCEPTUAL DESIGN OF HIGH SPEED TRAINS2014Ingår i: Proceedings of the ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference: 40th Design Automation Conference, Buffalo, New York, USA, 2014, Vol. 2AKonferensbidrag (Refereegranskat)
  • 128.
    Gottfarb, Jonas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Implementering av ögonspårning i en virtuell arbetsbänk2010Självständigt arbete på grundnivå (kandidatexamen), 10,5 poäng / 16 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Examensarbetet har omfattat en komplett produktutveckling. Detta har lett till en nyprodukt som företaget SenseGraphics ska vidareutveckla och förhoppningsvis producera. Jobbet har kantats av utmaningar vad det gäller tekniken och de begränsningar företaget satt på projektet. Arbetet inleddes med en förstudie för att skapa förståelse för de produkter som skulle sammanfogas. Sedan to s olika koncept fram och därefter valdes det bästa konceptet ut. Detta koncept modellerades sedan i CAD och ritningarna från det användes för att bygga en prototyp. Examensarbetet avslutades med en presentation hos de inblandade företagen.

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    fulltext
  • 129.
    Grahn, Sten
    et al.
    Swerea IVF AB, Sweden; Mälardalen University (MDH), Sweden.
    Gopinath, Varun
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Wang, Xi, Vincent
    KTH, Royal Institute of Technology, Stockholm 11428, Sweden.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Exploring a Model for Production System Design to Utilize Large Robots in Human-Robot Collaborative Assembly Cells2018Ingår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 25, s. 8s. 612-619Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    It has been shown that large robots can be safely installed for human-robot collaborative assembly cells in experimental setups. It has also been found that these installations require demanding considerations of a significant number of layout and safety parameters. This indicates that successful commercial implementations will require a resource efficient model for production system design that anticipates utilization of large robots in collaborative settings. Experiences from experimental setups have been used to explore a basic model for such production system design, to stimulate a discussion regarding what model characteristics should be tested and validated in future research.

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    fulltext
  • 130.
    Grahn, Sten
    et al.
    Mälardalen University (MDH), Eskilstuna, Sweden / Swerea IVF AB, Stockholm, Sweden.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Eriksson, Yvonne
    Mälardalen University (MDH), Eskilstuna, Sweden.
    Safety Assessment Strategy for Collaborative Robot Installations2017Ingår i: Robots Operating in Hazardous Environments / [ed] Hüseyin Canbolat, InTech, 2017Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Industrial resource efficiency can be improved if the safety barrier between humans and robots is removed, as this enables operators and robots to work side by side or in direct collaboration to solve a task, usually referred to as a collaborative robot installation. Even though technology development makes the barrier removal ever more feasible from a safety perspective, this still produces a possible hazardous working environment, and safety assessment strategies are crucial. A wide area of knowledge is required to assess all fields that can help ensure safe human-machine interaction. Here the focus is primarily on providing a description of the key fields identified, including how operators psychologically accept working with robots, and providing a cursory description of the research front for each individual field. In addition to covering a large number of parameters, the assessment strategy also needs to be cost-effective. A significant part of all parameters that can be considered when attempting to produce optimized and cost-effective collaborative robot installations will also have a direct impact on operator safety. Hence, assessments for safety, and assessments for cost-effectiveness, cannot be separated, and are treated as two objectives that need to be viewed in sync.

  • 131.
    Grahn, Sten
    et al.
    Swerea IVF AB, Sweden; Malardalen University, Sweden.
    Langbeck, Bjorn
    Swerea IVF AB, Sweden.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Backman, Bjorn
    Swerea IVF AB, Sweden.
    Potential advantages using large anthropomorphic robots in human-robot collaborative, hand guided assembly2016Ingår i: 6TH CIRP CONFERENCE ON ASSEMBLY TECHNOLOGIES AND SYSTEMS (CATS), ELSEVIER SCIENCE BV , 2016, Vol. 44, s. 281-286Konferensbidrag (Refereegranskat)
    Abstract [en]

    Collaborative robot installations often mean man-machine workspace sharing. This mode of operation can lead to reductions of tact time and work space requirements. We have analyzed potential further benefits of man machine collaboration, where operators and powerful robots share workspace, cooperating when lifting and handling large objects. We found that this mode of operation has the potential to generate economic advantages by reducing the need for manual operators and lifting tools and by offering new opportunities for component logistics. (C) 2016 The Authors. Published by Elsevier B.V.

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    fulltext
  • 132.
    Grandicki, Andreas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Lokgård, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Parametric CAD Modeling to aid Simulation-Driven Design: An evaluation and improvement of methods used at Scania2017Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This report documents a thesis conducted at Scania CV AB in Södertälje, Sweden. The main purpose of the thesis has been to examine and improve upon current practices of parametric CAD-modeling at Scania, with the ultimate goal of increased design automation and simulation-driven design. The thesis was initiated with a literature study, mainly covering the fields of parametric CAD-modeling, design automation and knowledge-based engineering. Furthermore, a questionnaire and multiple interviews were conducted to assess the awareness and mind-set of the employees. Finally, a case-study was carried out to follow current methodologies, and address any deficiencies found.

    Some of the most important findings were that while parametric modeling has considerable potential in enabling design automation, it is crucial, and most beneficial in terms of automation efficiency, to start with the fundamentals, namely achieving a uniform modeling practice. With these findings, a new proposed methodology has been introduced, as well as a recommended plan for a widespread implementation of parametric modeling at Scania. Such implementation would allow for shorter lead-times, faster adaptation to changing conditions, and reduced development expenditures.

    Ladda ner fulltext (pdf)
    fulltext
  • 133.
    Gunnarsson, Linda
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten. Scania.
    Helander, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten. Scania.
    How to handle boil-off gases from LNG trucks2015Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This master thesis project aims to investigate the circumstances of boil-off for heavy vehicle transports, using LNG as fuel, and suggest possible ways of handling these gases otherwise released into the atmosphere. LNG, Liquefied Natural Gas, is when natural gas is cooled below its vaporisation point, turning it into liquid phase which is a much more dense way of storing and transporting the fuel. Trucks running on LNG store their fuel in super insulated tanks, but some heat are transferred to the fuel anyway, causing it to vaporise at a steady rate. During driving of these trucks, this vaporised gas is consumed and the pressure are kept at a certain level of 10 bar. Once the truck is turned off, consumption stops and the pressure starts to increase. After a period of standstill, normally several days, the pressure within the tank has increased to 16 bar where a valve opens to release gas from the tank. This is a safety feature, causing the pressure not to increase further creating hazards. While natural gas, mostly containing methane, is released, fuel is lost and an environmentally unfriendly substance is let out into the atmosphere. This should be avoided, to improve the environmental aspects of using LNG as a fuel for trucks, which most likely will be regulated by laws yet to come. Since the release of boil-off gases rarely should happen during the regular use of these trucks, but a system handling these gases should work at any time and place, a cheap and lightweight unit are to be fitted to these trucks. Equipment already on the truck should be used as much as possible, keeping additional costs and weight low. The only practical way of storing this gas, which is the most resource efficient way of handling these boil-off gases, is to re-liquefy it and transferring it back to the usual LNG tank on the vehicle. The second best option is to consume the gas, making it less environmentally unfriendly. While consuming the gas, as much as possible of its energy should be utilised as electricity and heat. Preferably, electricity should be produced as much as possible, charging the batteries on the truck, decreasing the fuel consumption while running and increasing the lifespan of the batteries. The most efficient way of managing the heat generated is to distribute it to the coolant system on the truck, providing it to the engine and several other components. Distributing the energy is also a matter of safety, as very hot areas otherwise might cause risks of fire. The most simple concept, that is easiest to implement in the near future, is to use a burner similar to the auxiliary diesel heaters fitted to some trucks today. This consumes fuel, generating heat to the coolant system. An additional cooler is needed, to cool of excess heat from the system keeping the temperatures to a certain level. Using this system for an extensive period of time needs an external power supply, since no electricity is generated from consuming the gas. Other technologies that could be used in the future, also generating electricity, is thermoelectric generators and solid oxide fuel cells. These are technologies now being further developed and adapted to the industry of vehicles. These technologies are especially interesting when they are implemented to these trucks for use within other systems as well, for instance utilisation of the heat within exhaust gases. A small scale re-liquefaction unit mounted to the truck is however seen as the most resource efficient solution, making it possible to keep using the gas for it intended purpose of propelling the trucks forward. This technology has to be made more compact, adapting it to the use on a truck.

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    How to handle boil-off gases from LNG trucks
  • 134.
    Gunnarsson, Svante
    et al.
    Linköpings universitet, Institutionen för systemteknik, Reglerteknik. Linköpings universitet, Tekniska högskolan.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Adaptive Control with Impact on Detection of a Hydraulic Actuator Connected to a Flexible Mechanical Structure1995Ingår i: Proceedings of the Fourth Scandinavian International Conference on Fluid Power, 1995Konferensbidrag (Refereegranskat)
  • 135.
    Gunnarsson, Svante
    et al.
    Linköpings universitet, Institutionen för systemteknik, Reglerteknik. Linköpings universitet, Tekniska högskolan.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Numerical Optimization for a Self Tuning Electrohydraulic Control System1993Ingår i: Proceedings of the Second JHPS International Symposium on Fluid Power, 1993, s. 631-638Konferensbidrag (Refereegranskat)
  • 136.
    Gustafsson, Johan
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Milesson, Gustav
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Furusköld, Jenny
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Svedlindh, Klas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Ljung, Albin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Båtshake2014Självständigt arbete på grundnivå (kandidatexamen), 12 poäng / 18 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Rapporten behandlar det kandidatarbete som fem studenter blev tilldelade våren år 2014. Målet med arbetet innefattar utveckling och framtagning av en produkt som underlättar förtöjning av båtar vid exempelvis bojar och bryggor. Detta kandidatarbete resulterade i en produktdesign av en båtshake som underlättar förtöjning och denna uppfyller behov som har identifierats från en marknadsundersökning. Arbetet innefattar analyser av tillverkningsmetoder och material för att finna lämpliga sådana vid framtagning av produkten i fråga. Rapporten redogör även för hur koncept och design har tagits fram med hjälp av diverse konceptgenereringsmetoder. För att testa produktdesignen och dess funktioner tillverkades en prototyp likvärdig med den framtagna designen. Denna testades i sin arbetsmiljö, men även i en simulerad sådan. Därefter gjordes bedömningen att den uppfyller de mål och krav som har satts upp för projektet.

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    fulltext
  • 137.
    Gustavsson Mårdestam, Peter
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Lundin, Adam
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Efficiency Analysis of a Planetary Gearbox2010Självständigt arbete på grundnivå (högskoleexamen), 10,5 poäng / 16 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This Bachelor of Science thesis consists of an efficiency evaluation and creation of atheoretical model for an Atlas Copcos epicyclic gearbox. The thesis starts with atheoretical chapter containing the fundamentals of epicyclic gearing and the build of thespecific gearbox investigated. The following chapter contains former testing and theoryof power losses in a gearbox. After the theory is explained the next chapter containstesting, compromises and assumptions during testing and also results from the testing.The next chapter explains the Matlab calculation program based on the theory andmeasurements. Finally the model is validated against reference a reference model andagainst real gearbox measurements followed by some closing conclusions. The finalmodel calculates the efficiency rather well and has a linear difference. The difference isstatic since some losses have been left out, it can be fixed with an empirical correctionfactor which corrects the values and predicts an acceptable efficiency. The correctionfactor for the surface roughness also decreases the difference.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 138.
    Gyllenbreider, Magnus
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Utveckling av ergonomiskt hjälpmedel för personer med uppresningsbesvär2010Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This report is the final result of the master thesis that have been done at  Sharpman Engineering. Sharpman Engineering is a small development and manufacturing company that produces and make drawings for everything from heavy duty log raft to aids for disabled people. The purpose have been to make one concept that make it easy for elderly and people having problem with knee- and back problem to stand up from a sitting position. The final result will the company have for further investigations and use for a pre-serial production with the goal to produce a new working product.

    To get an overview of what is on the market have a comprehensive survey has been done, followed by a survey on patent. This patent survey are for no intrusion on existing patents should occur and give new ideas. The next step was generate concepts from a morphological matrix that has been evaluated from knowledge and experience. The concepts that were interesting to work further on have been made as small scale models, and new thoughts and ideas grown from there.

    The concepts and ideas that have been further investigated have been built in large scale prototypes. These prototypes have been tested on users on a community centre for the elderly and the staff working there. The final result will be created as a final prototype. This is a wish from the company and lay outside the master thesis.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 139.
    Hall, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Automatiserad viktkontroll av formsprutade detaljer2010Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Arbetet utfördes på Sura Magnets, ett företag i Söderköping som bl.a. tillverkar formsprutade plastbaserade magneter. En av deras produkter kallad ”10 mm:aren” tillverkas genom formsprutning. Varje skott ger 6 detaljer. Problemet de har är, att ofyllda skott kan tillverkas. För att undvika att dessa ofyllda detaljer når kunderna, gör man en manuell avsyning, vilket är ett väldigt tidskrävande arbete. Syftet med arbetet var att tillverka en automatiserad utrustning som via vikt kontroll ska avskilja de kasserade skotten.

    Efter att ha införskaffat information om problemen, genererades ett antal koncept för att lösa dessa. Efter att ett koncept blivit valt, konstruerades en automatiskviktkontroll mekaniskt och elektriskt. Därefter tillverkades ett PLC program för att styra utrustningen.

    Dessvärre hann inte alla detaljer till utrustningen tillverkas, så den har inte kunnat testas i praktiken. Detta överlåtes till Sura Magnets att utföra. Hoppas att konstruktionen kommer att utföra det avsedda arbetet på ett tillfredställande sätt.

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    FULLTEXT01
  • 140.
    Hallberg, Peter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten. Linköpings universitet.
    CEP - CDIO Enabling Platform as a Catalyst for Course Integration2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    This contribution presents and discusses a CDIO enabling platform (CEP) used within courses at the Department of Management and Engineering, Linköping University, Sweden. The platform consists of a physical setup manifesting several potential real R&D situations, including production aspects. When present in courses, it is combined with the scenario technique based on a potential business case. The physical hardware of this teaching platform is a modular multi-utility bicycle, commonly referred to as a cargo-bike, together with assembly and welding fixtures.

    From a learning theory perspective, lack of course integration and curriculum progression is problematic. For instance, the rationale of constructivism tells us that new knowledge is largely based on and created from previous knowledge. It follows that courses must "talk" with each other in the sense that students are able to use newly acquired knowledge from one course directly in another.

    CDIO implementation is yet another aspect where issues of insufficient course integration and progression adds to the problem. CDIO is basically about bridging the gap between theory and practice. And since heavily theory oriented traditional courses are hard to align with the CDIO syllabus, an implementation process may benefit from solutions that foster course integration.

    CEP enables and facilitates the implementation of the CDIO standard in several ways. Furthermore, from the curriculum perspective, the platform may serve as a catalyst for course integration. This paper discusses and exemplifies both these issues, CDIO implementation and course integration, using an intermediate computer aided engineering course during the third semester of the program, where the learning outcomes also includes innovative thinking and oral presentation techniques.

  • 141.
    Hallberg, Peter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten. Linköpings universitet.
    CURRICULUM ADAPTATION IN ERAS OF TRANSFORMATION BY UTILIZING A CDIO ENABLING PLATFORM2018Ingår i: Proceedings of the 14th International CDIO Conference, Kanazawa Institute of Technology,Kanazawa, Japan, June 28 - July 2, 2018., 2018Konferensbidrag (Refereegranskat)
    Abstract [en]

    Concerning profession degree programs, this contribution discusses aspects of curriculum design that arguably will become affected by the ongoing digital transformation of the society.For this purpose, a CDIO Enabling Platform (CEP) is exemplified with hardware representing a modular cargo bicycle under development. Paired with a corresponding scenario tailored to simultaneously support multiple courses with active learning modules, the platform simulates a multi-disciplinary engineering environment during a full semester. On a broader perspective, the way learning activities are organized using the CEP, a less rigid curricula structure is enabled. The paper argues that, for academic programs to stay relevant throughout the period of its execution of up to five years, inevitably a more flexible and adaptable curricula will become necessary as demands from the community rapidly transform under the influence of trends like IoT, AI and Industry 4.0.Furthermore, the CEP is being evaluated from the faculty perspective, represented by a team of program planners and course examiners, with the specific purpose of assessing its effects on a number of parameters, including motivation, engagement, and examination results.A key component in the concept of CEP is industry engagement during planning and execution of the curricula. The initial response from the industry is very positive according to results from an interview study during which the platform was introduced and evaluated by SMEs in Sweden. In addition, an in-depth interview with a representative of the industry reveals several interesting issues and potential uses of the CEP regarding the need for life-long learning and re-education due to obsolete core knowledge among the workforce.Following an in-depth discussion regarding the role of active learning modules of a curriculum, the conclusion is that a learning platform, such as the CEP, could be used to tackle future demands on engineering education institutions, driven by an accelerating pace of transformation within related technical domains.

  • 142. Beställ onlineKöp publikationen >>
    Hallberg, Peter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Low-Cost Demonstrators: Enhancing Product Development with the Use of Physical Representations2013Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [sv]

    Under första halvan av 1990-talet blev verktyg som 3D-CAD allmänt tillgängliga inom tillverkningsindustrin. I och med det påbörjades även en strävan efter effektiviseringsvinster genom att i större utsträckning utveckla virtuella prototyper istället för fysiska dito, en trend som alltjämt fortgår. Det finns dock aspekter av produktutvecklingsprocessen som blir lidande då den fysiska representationen av en produkt under utveckling uteblir. Således finns det gränser för i hur stor utsträckning digitala modeller kan bidra till effektivisering av produktutvecklingsprocessen. Den här avhandlingen argumenterar istället för en kombination av virtuella och fysiska representationer som en möjlig väg till ytterligare effektivitetsvinster.

    I avhandlingen introduceras begreppet lågkostnadsdemonstrator. Genom att kombinera och studera fyra olika teoriområden - produktutvecklingsmetodik, prototypframtagning, datorstödd konstruktion samt pedagogisk teori – identifieras denna typ av demonstratorer som möjliga medel för att nå ytterligare effektivitetsvinster. Vidare visar sig lågkostnadsdemonstratorer särskilt användbara då produktutvecklingsprocessen innefattar ny och obekant teknologi. Lågkostnadsdemonstratorer kan potentiellt agera katalysator för kreativitet och innovation i datorintensiva utvecklingsmiljöer.

    Till grund för utvärdering och validering av begreppet  lågkostnadsdemonstratorer ligger flera kurser i grundutbildningen vid Linköpings universitet.

    Delarbeten
    1. Low Cost Demonstrator As A Mean For Rapid Product Realization With An Electric Motorcycle Application
    Öppna denna publikation i ny flik eller fönster >>Low Cost Demonstrator As A Mean For Rapid Product Realization With An Electric Motorcycle Application
    2005 (Engelska)Ingår i: 2005 ASME International Design Engineering Technical Conferences Computers and Information In Engineering Conference - 31st Design Automation Conference, 2005: Volume 2: 31st Design Automation Conference, Parts A and B, 2005Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
    Abstract [en]

    During the last decade, digital prototyping has become a natural part of any industrial project dealing with product development. The reasons for this differ, but the two most obvious is time saving aspects and the amount of cost effectiveness achieved when replacing the physical prototype with the cheaper digital. Time and cost are equally, or even more critical in academic projects. This paper describes the usage of a low cost demonstrator as a mean to reduce both time and cost during a product development project course as well as to guarantee educational quality. The paper also discusses the reason for using demonstrators in an industrial environment. When large product development project courses are given at educational engineering programs, they often strive for imitating a real industrial situation, trying to include all the phases and aspects of product realization. Time is of course critical in both environments, industrial and academic, but for slightly different reasons. A typical industrial project may run over several years while a large educational project-s duration is counted in months. Thus, if the course tutor wants to simulate the whole product development process, within the same project course, there are needs for means that may speed up the project without spoiling the educational message as well as the industrial authenticity.

    Nyckelord
    Demonstrator, Elektrisk motorcykel, Rapid product development, Engineering design education
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-29729 (URN)15127 (Lokalt ID)0-7918-4739-X (ISBN)15127 (Arkivnummer)15127 (OAI)
    Konferens
    31st International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, September 24-28, Long Beach, California, USA
    Tillgänglig från: 2009-10-09 Skapad: 2009-10-09 Senast uppdaterad: 2012-12-20
    2. Redsigning Mature Products for Substainability
    Öppna denna publikation i ny flik eller fönster >>Redsigning Mature Products for Substainability
    2006 (Engelska)Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
    Abstract [en]

    This contribution will discuss engineering design projects with various environmental and sustainable objectives. The automotive industry is facing a major vicissitude regarding the system layouts of their products. Given the rapidly increasing demands for environmentally acceptable and sustainable vehicles, developed even faster and under increasing competition, one could expect a future, or a period of transition, where a “market pull”-situation will exact design methods more adapted for new propulsion technologies such as fuel cells, bio-fuels, hybrid configurations and so forth. When looking at two-wheeled vehicles it is also a matter of a dramatic change in the safety requirements that would affect the design process in a similar way.

    This paper presents studies made regarding development of two-wheeled vehicles with strict safety, environmental and sustainability requirements. It also describes what happens when a very mature product, such as a conventional motorcycle, undergoes dramatic changes in propulsion system and safety features and becomes technically immature, but still has to preserve its traditional values in the eyes of the consumer. Over the last two years, the Department of Mechanical Engineering at Linköping University has conducted various projects dealing with these issues using rapid, low-cost, demonstrator development together with digital models. The demonstrator is used as a vehicle to evaluate the integration of technology, as well as less tangible aspects such as ergonomics, drivability, appeal, visual impression etc. This approach has proven particularly fruitful when dealing with new technologies with a high level of innovation. The rapid nature of these projects also makes them suitable for exploring digital collaboration tools aimed at controlling and speeding up the design process.

    Nyckelord
    Innovation, Sustainability, Electric Motorcycle
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-36391 (URN)31231 (Lokalt ID)31231 (Arkivnummer)31231 (OAI)
    Konferens
    NordDesign 2006, Reykjavik, Iceland, August 16-18
    Tillgänglig från: 2009-10-10 Skapad: 2009-10-10 Senast uppdaterad: 2012-12-20Bibliografiskt granskad
    3. Modular sustainable light multi-purpose vehicle
    Öppna denna publikation i ny flik eller fönster >>Modular sustainable light multi-purpose vehicle
    2008 (Engelska)Ingår i: EET-2008 European Ele-Drive Conference,2008, 2008Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    In contrast to the major vicissitude faced by the transportation sector in developed countries due to environmental or political reasons, this contribution mainly fits into the discussion on how to make emerging markets adopt sustainable personal vehicles other than automobiles. A modularised light electric vehicle transportation system is presented.

    Furthermore, the vehicles included in the presented system would also hold properties suited for transportation needs in developed countries. One issue would be not only a smaller environmental footprint, but also a more attractive physical footprint, in the sense that actual space is a matter of economy in densely urbanised areas.

    Nyckelord
    Demonstration, BEV, EV, HEV, market, motorcycle, PHEV, scooter
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-43867 (URN)74985 (Lokalt ID)74985 (Arkivnummer)74985 (OAI)
    Konferens
    3rd European Ele-Drive Transportation Conference EET-2008, March 11-13, 2008, Geneva, Switzerland
    Tillgänglig från: 2009-10-10 Skapad: 2009-10-10 Senast uppdaterad: 2012-12-20Bibliografiskt granskad
    4. Hands-On Assessment During Computer Aided Engineering Education
    Öppna denna publikation i ny flik eller fönster >>Hands-On Assessment During Computer Aided Engineering Education
    2013 (Engelska)Ingår i: ASME 2012 International Mechanical Engineering Congress and Exposition: Volume 5, The American Society of Mechanical Engineers (ASME) , 2013, Vol. 5, s. 121-130Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    This contribution discusses aspects and benefits from involving physical representations when teaching engineering design and Computer Aided Engineering at Linköping University, Sweden.

    The paper presents a syllabus for a comprehensive introductory CAD course. The course is populated by some 300 students on the Mechanical Engineering Master’s and Bachelor’s programs, as well as the Design and Product Development Master’s program. Assessment is made via a project where the students are assigned to model and optimize a small catapult. The catapult is then produced, using cheap materials, by the hands of the students who modeled it. Finally, the catapult is validated by entering a contest, where it is judged in respect of accuracy, weight, and cost. The catapult assignment is constructed in such a way that the students are forced to seek individual ways of applying their newly acquired knowledge of the CAD tool. Some 100 catapults are produced but the material cost for each catapult is only about €4.

    The low-cost nature of the catapults originates from research conducted at the Division of Machine Design at Linköping University, where the concept of Low-cost Demonstrators for enhancement of the conceptual design phase has been developed over the past decade. The results from this research point towards several benefits from using physical representations alongside the common digital tools during the early stages of the product development process. Furthermore, evaluation of parameters such as the students’ performance and their own opinions of the course show notable enhancement compared to previous courses.

    Ort, förlag, år, upplaga, sidor
    The American Society of Mechanical Engineers (ASME), 2013
    Nyckelord
    Demonstrator, prototype, cad, computer aided design, undergraduate, assessment, learning theory, product development
    Nationell ämneskategori
    Annan maskinteknik Pedagogik Lärande Pedagogiskt arbete
    Identifikatorer
    urn:nbn:se:liu:diva-85498 (URN)10.1115/IMECE2012-89349 (DOI)000350070700017 ()978-0-7918-4521-9 (ISBN)
    Konferens
    ASME International Mechanical Engineering Congress and Exposition, Houston, Texas, USA, November 9-15, 2012
    Tillgänglig från: 2012-11-23 Skapad: 2012-11-20 Senast uppdaterad: 2016-06-03Bibliografiskt granskad
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    Low-Cost Demonstrators: Enhancing Product Development with the Use of Physical Representations
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    omslag
  • 143.
    Hallberg, Peter
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    ModuLiTH - TMKT38 Maskinkonstruktion projektkurs 20072007Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Under vårterminen har 16 teknologer på Linköpings tekniska högskola genomfört ett projekt som syftar till att ta fram ett modulärt och uthålligt fordon för utvecklingsländer. Teknologerna är fjärdeårsstudenter vilka har specialiserat sig mot maskinkonstruktion på civilingenjörsprogrammet i maskinteknik. Projektet har gått på halvfart och omfattat 10 poäng. Arbetet påbörjades med att ta fram kravspecifikationer och dylikt, bland annat utifrån kundens, Skyllermarks Pressar AB, önskemål. Detta arbete tog nästan halva kursen i anspråk. Kravspecifikationen visade bland annat på att fordonet ska vara eldrivet, robust, enkelt och ha en stor lastförmåga. Efter att arbete med specifikationen var avslutat tog konstruktionsarbetet vid. Ett par donatorer med lämpliga egenskaper köptes in och ramar började detaljkonstrueras och tillverkas. Från Kina beställdes navmotorer som användes till framdrivning. Efter några veckors byggande stod de två modulära fordonen klara. Fordonen som tillverkats var modulära med en gemensam mittmodul med batterier, fast kunde ha ett eller två framhjul och likaså ett eller två bakhjul. Totalt går det alltså att kombinera ihop 4 olika fordon. Allt ifrån en enkel tvåhjuling och en konventionell fyrhjuling till två mer nyskapande trehjulingar. Provkörning och pressvisning av fordonen gjordes med mycket bra resultat.

  • 144.
    Hallberg, Peter
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Andersson, Henric
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Nåbo, Mats
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Modular sustainable light multi-purpose vehicle2008Ingår i: EET-2008 European Ele-Drive Conference,2008, 2008Konferensbidrag (Refereegranskat)
    Abstract [en]

    In contrast to the major vicissitude faced by the transportation sector in developed countries due to environmental or political reasons, this contribution mainly fits into the discussion on how to make emerging markets adopt sustainable personal vehicles other than automobiles. A modularised light electric vehicle transportation system is presented.

    Furthermore, the vehicles included in the presented system would also hold properties suited for transportation needs in developed countries. One issue would be not only a smaller environmental footprint, but also a more attractive physical footprint, in the sense that actual space is a matter of economy in densely urbanised areas.

  • 145.
    Hallberg, Peter
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Ölvander, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Hands-On Assessment During Computer Aided Engineering Education2013Ingår i: ASME 2012 International Mechanical Engineering Congress and Exposition: Volume 5, The American Society of Mechanical Engineers (ASME) , 2013, Vol. 5, s. 121-130Konferensbidrag (Refereegranskat)
    Abstract [en]

    This contribution discusses aspects and benefits from involving physical representations when teaching engineering design and Computer Aided Engineering at Linköping University, Sweden.

    The paper presents a syllabus for a comprehensive introductory CAD course. The course is populated by some 300 students on the Mechanical Engineering Master’s and Bachelor’s programs, as well as the Design and Product Development Master’s program. Assessment is made via a project where the students are assigned to model and optimize a small catapult. The catapult is then produced, using cheap materials, by the hands of the students who modeled it. Finally, the catapult is validated by entering a contest, where it is judged in respect of accuracy, weight, and cost. The catapult assignment is constructed in such a way that the students are forced to seek individual ways of applying their newly acquired knowledge of the CAD tool. Some 100 catapults are produced but the material cost for each catapult is only about €4.

    The low-cost nature of the catapults originates from research conducted at the Division of Machine Design at Linköping University, where the concept of Low-cost Demonstrators for enhancement of the conceptual design phase has been developed over the past decade. The results from this research point towards several benefits from using physical representations alongside the common digital tools during the early stages of the product development process. Furthermore, evaluation of parameters such as the students’ performance and their own opinions of the course show notable enhancement compared to previous courses.

    Ladda ner fulltext (pdf)
    fulltext
  • 146.
    Hamilton, Jakob
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Jeresi, Mahmoud
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Geometry-Based Requirements: Support requirement owners in connecting and mediating requirements from SystemWeaver to CATIA V52018Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Requirements of a Volvo car are stored in a requirements management system at Volvo Car Group (VCG). VCG recently implemented a new requirements management system, a system called SystemWeaver. Many different types of requirements are stored in the SystemWeaver software, where the requirements can only be described in text and pictures. However, some requirements are geometry-based, describing some type of shape or measurement in space that the car should fulfil. Geometry-based requirements are stored in Teamcenter and have two components, the requirement text and requirement geometry in the form of CAD-models. The models are used to illustrate the requirement in space. This master thesis examines the possibilities of connecting text-based requirements in SystemWeaver to requirement geometries. The technical aspects are studied as well as the organizational mechanisms of creating and changing a geometry-based requirement. To find a working solution, research relating to the issue gave input to the project. Furthermore, interviews were conducted at different departments at VCG to get insight in the working tasks of requirement management at the company. The project resulted in a concept of a new process, describing the actions of geometry-based requirement management and how requirement geometries should be connected to SystemWeaver. The new concept outlined the logical steps that are required to work with SystemWeaver and geometry-based requirements. The work has laid a foundation on which future studies can be conducted to further streamline management of geometry-based requirements at VCG. 

    Ladda ner fulltext (pdf)
    fulltext
  • 147.
    Hanson, Mattias
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Öd Österman, David
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Produktutvecklingsmetoder för industriellt restmaterial2009Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Rapporten behandlar framtagandet av en produktutvecklingsmetod för industriellt restmaterial. Studien har gjorts på uppdrag av Creatables som är ett projekt inom företaget KAAV AB.Creatables arbetar med att ta fram konsumentprodukter genom att ta tillvara och förädla restmaterial från industrin, därav deras slogan Made from Waste.

    Dagens konsumtionssamhälle förbrukar mycket av jordens resurser och det krävs en effektivisering i utnyttjandet av dessa för att säkra tillgångar för framtida generationer. Creatables är ett ungt projekt med små resurser och således har syftet med examensarbetet varit att ta fram en ny produktutvecklingsmetod för Creatables anpassad till deras arbetssätt och storlek.

    För att utreda uppgiften har arbetet delats in i två delar som sedan utvecklats parallellt med varandra. En produktutvecklingsmetod och ett flertal produkter av restmaterial har arbetets fram.

    Litteraturstudier, intervjuer och studiebesök har genomförts för att bygga en grund för resultatet att stå på. Tidigare publicerade teorier om produktutveckling har studerats och informationen och resultaten från dessa har i kombination med produktutvecklingsarbetet använts för att ta fram en produktutvecklingsmetod som passar Creatables.

    Resultatet är indelat i tre huvudområden. Första delen av resultatet är en vägledning till hur Creatables bör arbeta och tänka för att hitta relevanta företag. Därefter följer en utförlig beskrivning av den framtagna produktutvecklingsmetoden som har fått namnet The Creatables’ Way.

    Fortsatt arbete bör bedrivas med att testa och utvärdera den framtagna produktutvecklingsmetoden med avsikt att jämföra den med Creatables arbetssätt idag för att sedan kombinera starka och svaga sidor från de båda.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 148.
    Hansson, Lisen
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Nilsson, Lisa
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Utveckling av en modulbaserad luftridå för industriportar2016Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Under de senaste 30 åren har energieffektivisering blivit ett allt hetare och viktigare ämne. Detta har lett till att det dykt upp nya produkter på marknaden inom det här området och en av dessa är luftridåer. Luftridåer används för att minska värmeutbytet genom dörr - och portöppningar, genom att skilja de olika klimaten med hjälp av en luftström.

    Syftet med detta projekt var att energieffektivisera industrilokaler där in- och utlastning av varor sker genom portar, som öppnas ofta eller står öppna under en längre tid. Målet var att utveckla en luftridå som kan anpassas för olika sorters industriportar med dimensioner på upp till 5x5 meter. Därmed minskar behovet av extra uppvärmning av lokalen och ett mer komfortabelt klimat för arbetarna kan erhållas.

    I det här projektet har en modulbaserad luftridå utvecklats med hjälp av en iterativ produktutvecklingsprocess, med uppdrag från företaget Sprintline Industriservice. Projektet inleddes med en förstudie, som fortsatte med en konceptutvecklingsfas. Då det var mycket som var okänt kring hur olika parametrar påverkar luftridåns funktion, utfördes konceptutvecklingen med stort fokus på prototyptester. Konceptutvecklingen utfördes därför iterativt genom att tester på fysiska prototyper varvades med utvärdering och analytiska beräkningar.

    Projektet har resulterat i en slutprototyp som har testats och utvärderats. Det valda konceptet kan anpassas till olika portar och portdimensioner eftersom olika moduler i systemet kan bytas ut. Till det valda konceptet presenteras även beräknade parametrar för luftridåns fläkt. Detta gör det enklare att välja rätt fläkt till rätt luftridåsystem och port. 

    Ladda ner fulltext (pdf)
    fulltext
  • 149.
    Henriksson, Fredrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Integrated Product and Production Research on Introducing Internet of Things in Swedish Wood Industry Products2018Ingår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 25, s. 10-16Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    To enable transitioning the Swedish economy into a bioeconomy, Swedish wood industry need to increase added value and introduce new products to market by introducing new technology and improving the product and production development processes. Research in automotive industry have shown the need for integrating product and production development when introducing new technology in existing production systems, and have indicated a possibility of using specifically designed student case projects in order to generate qualitative data. In this paper, one student case project on product and production development in the Swedish wood industry, involving IoT wood products, is presented and evaluated.

    Ladda ner fulltext (pdf)
    fulltext
  • 150. Beställ onlineKöp publikationen >>
    Henriksson, Fredrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Introducing New Materials in the Automotive Industry: Managing the Complexity of Introducing New Materials in Existing Production Systems2017Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Passenger vehicles are central to Western society, and contribute to a significant part of our greenhouse gas emissions. In order to reduce emissions, the automotive industry as a whole is working to reduce mass in passenger vehicles in order to reduce energy consumption. One way to reduce mass is to introduce lightweight materials in the body of the vehicle. This research aims to explore the relationship between product and production system when introducing new materials.

    Besides a theoretical review and an industry-centered technological mapping, four case studies have been conducted during the course of this licentiate thesis. Two case studies were conducted with engineering design students working as development teams, one case study with the author as the developer and finally one case study in an industrial environment at a product owning company with in-house production. The goal of the case studies has been to increase the collective knowledge of how product development decisions affect production development decisions, and vice versa, when developing passenger vehicles in new materials.

    In the following analysis of case study outcomes, a number of factors important for introducing new materials are discussed. The relationship between product and production is investigated, both in terms of how the production system affects the product and how the product affects the production system. The outcome from this analysis is a mapping of important factors for automotive industry companies to understand and identify when looking at introducing new materials in existing production systems. Finally, a suggestion for future research efforts is presented.

    Delarbeten
    1. An outlook on multi material body solutions in the automotive industry – possibilities and manufacturing challenges
    Öppna denna publikation i ny flik eller fönster >>An outlook on multi material body solutions in the automotive industry – possibilities and manufacturing challenges
    2016 (Engelska)Ingår i: SAE Technical Paper Series, Detroit (MI), USA: Society of Automotive Engineers, 2016Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    In the automotive industry, mass reduction and lightweight design is a continuing trend that does not show signs of declining. When looking at where to reduce weight in a vehicle, the body is a preferential subsystem due to its large contribution to overall mass and the stability of body composition over a specific model range. The automotive industry of today moves toward a greater differentiation in materials that compose a car, which can be seen in the several different multi material vehicle bodies that have been introduced by manufacturers in recent years. But while mixing materials may contribute to a good compromise between weight reduction and vehicle cost, it also proposes a number of challenges that need to be addressed. Among other material factors, the different coefficients of thermal expansions might introduce new stresses during painting and curing. Joining processes and possible chemical reactions between materials also needs to be taken into account, the same with the question of whether to integrate or differentiate different functions in a system. If the manufacturing plant uses mixed model assembly lines, design of end effectors for gripping multiple different materials is another challenge not previously encountered in this context. In this paper, a number of production and manufacturing related challenges are discussed, and the authors highlight different areas where the requirements of design engineering tools needs to be evaluated for these new multi material concepts and design decisions in order for automotive manufacturers to ensure future market competitiveness.

    Ort, förlag, år, upplaga, sidor
    Detroit (MI), USA: Society of Automotive Engineers, 2016
    Nyckelord
    Multi material bodies, Production development, Product development
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-127319 (URN)10.4271/2016-01-1332 (DOI)
    Konferens
    SAE 2016 World Congress and Exhibition
    Projekt
    Produktion2030 - Storskalig tillverkning av produkter i flera material
    Forskningsfinansiär
    VINNOVA
    Tillgänglig från: 2016-04-20 Skapad: 2016-04-20 Senast uppdaterad: 2017-11-08Bibliografiskt granskad
    2. On Material Substitution in Automotive BIWs – From Steel to Aluminum Body Sides
    Öppna denna publikation i ny flik eller fönster >>On Material Substitution in Automotive BIWs – From Steel to Aluminum Body Sides
    2016 (Engelska)Ingår i: 26TH CIRP DESIGN CONFERENCE / [ed] Wang, Lihui; Kjellberg, Torsten, Elsevier, 2016, Vol. 50, s. 683-688Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    Weight reduction and material substitution are increasing trends in the automotive industry. In this project, the task of substituting the steel body side in the monocoque of a large SUV towards an aluminum body side was investigated through a design engineering approach adopting a breadth-first analysis method. One conclusion based on the analysis is that the choice of joining technology would become arbitrary due to the breadth-first approach. In this paper, the authors present their findings from the aforementioned case, including the challenges with switching between materials with fundamentally different properties when performing material substitution projects. The possibility of having taken a depth-first analysis approach, and the possible effects on the project result, is discussed.

    Ort, förlag, år, upplaga, sidor
    Elsevier, 2016
    Serie
    Procedia CIRP, ISSN 2212-8271 ; 50
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-130510 (URN)10.1016/j.procir.2016.05.028 (DOI)000387666600115 ()
    Konferens
    26th CIRP Design Conference
    Projekt
    Produktion 2030 - Storskalig tillverkning av produkter i flera material
    Forskningsfinansiär
    VINNOVA
    Tillgänglig från: 2016-08-11 Skapad: 2016-08-11 Senast uppdaterad: 2017-11-08
    3. Including Student Case Projects in Integrated Product and Production Development Research – Methodology Description and Discussion
    Öppna denna publikation i ny flik eller fönster >>Including Student Case Projects in Integrated Product and Production Development Research – Methodology Description and Discussion
    2016 (Engelska)Konferensbidrag, Enbart muntlig presentation (Övrigt vetenskapligt)
    Abstract [en]

    Within integrated product and production development research, casestudies needto be performed for data gathering purposes. Today, there are two commonly used ways to perform this research; observingindustry projects orhaving the researchers perform the projects themselves. The first option can pose data access and IPRissues, and the second optioncomes with biasing risks. Another approach is to work with studentcaseprojects, givingstudents interesting projects and findinga solution to mediate both data gathering opportunity and biasing risks. This approach has been tested at Linköping University, with students performing projects in the Vinnovafunded Production 2030 –Large Scale Production in Mixed Materials project. Two larger student case projects have been performed on the topic of material substitution and mixed material solutions within the automotive industry.In this paper, the method used to include student projects is presented along with identified benefits and drawbacks. Including student case projects in research have shown to be beneficial in research on processes, projects and methodology, but needs to be complemented by data fromindustry projects and the researcher ́s own work within integrated product and production development in order to create a more reliable analysis with high level of detail.

    Nyckelord
    Case studies, Integrated product and production development, mixed material solutions
    Nationell ämneskategori
    Produktionsteknik, arbetsvetenskap och ergonomi
    Identifikatorer
    urn:nbn:se:liu:diva-142930 (URN)
    Konferens
    7th Swedish Production Symposium, SPS, Lund, October 25-27, 2016
    Forskningsfinansiär
    VINNOVA
    Anmärkning

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    Tillgänglig från: 2017-11-13 Skapad: 2017-11-13 Senast uppdaterad: 2017-11-20
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