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  • 301.
    Schöneich, Mark
    et al.
    University Saarbrücken, Germany.
    Kratz, Andrea
    Zuse Institute Berlin.
    Hotz, Ingrid
    German Aerospace Center (DLR).
    Stommel, Markus
    Technical University Dortmund, Germany.
    Scheuermann, Gerik
    University of Leipzig.
    Zobel, Valentin
    University of Leipzig.
    Optimization strategy for the design of ribbed plastic components2014Ingår i: Journal of Plastics Technology, nr 10, s. 160-175Artikel i tidskrift (Refereegranskat)
  • 302.
    Schütte, Simon
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Lokman, Anitawati Mohd
    Univ Teknol MARA UiTM, Malaysia.
    Marco-Almagro, Lluis
    Univ Politecn Cataluna, Spain.
    Ishihara, Shigekazu
    Hiroshima Int Univ, Japan.
    Yanagisawa, Hideyoshi
    Univ Tokyo, Japan.
    Yamanaka, Toshimasa
    Univ Tsukuba, Japan.
    Valverde, Nuno
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Coleman, Shirley
    Newcastle Univ, England.
    Kansei for the Digital Era2023Ingår i: INTERNATIONAL JOURNAL OF AFFECTIVE ENGINEERING, ISSN 2187-5413Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    For over 40 years, Kansei-based research and development have been conducted in Japan and other East Asian countries and these decades of research have influenced Kansei interpretation. New methods and applications, including virtual reality and artificial intelligence, have emerged since the millennium, as the Kansei concept has spread throughout Europe and the rest of the world. This paper reviews past literature and industrial experience, offering a comprehensive understanding of Kansei, the underlying philosophy, and the methodology of Kansei Engineering from the approach of psychology and physiology, both qualitatively and quantitatively. The breadth of Kansei is described by examples, emerging from both industry and academia. Additionally, thematic mapping of the state-of-the-art as well as an outlook are derived from feedback obtained from structured interview of thirty-five of the most distinguished researchers in Kansei. The mapping provides insights into current trends and future directions. Kansei is unique because it includes the consideration of emotion in the design of products and services. The paper aims at becoming a reference for researchers, practitioners, and stakeholders across borders and cultures, looking for holistic perspectives on Kansei, Kansei Engineering, and implementation methods. The novelty of the paper resides in the unification of authors amongst pioneers from different parts of the world, spanning across diversified academic backgrounds, knowledge areas and industries.

  • 303.
    Sharifimajd, Babak
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Mekanik. Linköpings universitet, Tekniska högskolan.
    Stålhand, Jonas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Mekanik. Linköpings universitet, Tekniska högskolan.
    A continuum model for excitation–contraction of smooth muscle under finite deformations2014Ingår i: Journal of Theoretical Biology, ISSN 0022-5193, E-ISSN 1095-8541, Vol. 355, s. 1-9Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The main focus in most of continuum based muscle models is the muscle contraction dynamics while other physiological processes governing muscle contraction, e.g., the cell membrane excitation and the activation, are ignored. These latter processes are essential to initiate contraction and to determine the amount of generated force, and by excluding them, the developed model cannot replicate the true behavior of the muscle in question. The aim of this study is to establish a thermodynamically and physiologically consistent framework which allows to model smooth muscle contraction by including cell membrane excitability and kinetics of myosin phosphorylation, along with dynamics of smooth muscle contraction. The model accounts for these processes through a set of coupled dissipative constitutive equations derived by applying the first principles. To show the performance of the derived model, it is evaluated for two different cases: a mechanochemical study of pig taenia coli cells where the excitation process is excluded, and a complete excitation–contraction process of rat myometrium. The results show that the model is able to replicate important aspects of the smooth muscle EC process acceptably.

  • 304.
    Sharifimajd, Babak
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Mekanik. Linköpings universitet, Tekniska högskolan.
    Stålhand, Jonas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Mekanik. Linköpings universitet, Tekniska högskolan.
    A continuum model for skeletal muscle contraction at homogeneous finite deformations2013Ingår i: Biomechanics and Modeling in Mechanobiology, ISSN 1617-7959, E-ISSN 1617-7940, Vol. 12, nr 5, s. 965-973Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The contractile force in skeletal muscle models is commonly postulated to be the isometric force multiplied by a set of experimentally motivated functions which account for the muscle’s active properties. Although both flexible and simple, this approach does not automatically guarantee a thermodynamically consistent behavior. In contrast, the continuum mechanical model proposed herein is derived from fundamental principles in mechanics and guarantees a dissipative behavior. Further, the contractile force is associated with a friction clutch which provides a simple and well-defined macroscopic model for cycling cross-bridges. To show the performance of the model, it is specialized to standard experiments for rabbit tibialis anterior muscle. The results show that the model is able to capture important characteristics of skeletal muscle.

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  • 305.
    Si, Shubin
    et al.
    Department of Industrial Engineering, School of Mechatronics, Northwestern Polytechnical University, Xian, China.
    Liu, Yang
    Department of Production, University of Vaasa, Vaasa, Finland.
    Takala, Josu
    Department of Production, University of Vaasa, Vaasa, Finland.
    Sun, Shudong
    Department of Industrial Engineering, School of Mechatronics, Northwestern Polytechnical University, Xian, China.
    Benchmarking and developing the operational competitiveness of Chinese state-owned manufacturing enterprises in a global context2010Ingår i: International Journal of Innovation and Learning, ISSN 1471-8197, E-ISSN 1741-8089, Vol. 7, nr 2, s. 202-222Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The purpose of this paper is to study the operational competitiveness of Chinese State-Owned Manufacturing Enterprises (CSOMEs) by analysing the case CSOME and comparing it with other global manufacturing companies in a Global Manufacturing Strategies (GMSS) database for developing innovation and learning. Analytical models are used to analyse the operational competitiveness of the case CSOME and its subsidiaries based on the weights of the multicriteria manufacturing strategies. The operational competitiveness development of its subsidiaries are applied to predict the future operational competitiveness of the case CSOME in a global context. The results show that quality is the most important competitive priority of the case CSOME and the case CSOME have some advantages when competing in a prospector group. The ranking and stability of the operational competitiveness of the case CSOME imply that: (1) the top CSOMEs have a strong operational competitiveness in the global context; however, they have some gaps compared to the top manufacturing enterprises in the world and (2) it will take a long time for the top CSOMEs to improve their operational competitiveness because of a huge organisational structure. Copyright © 2010 Inderscience Enterprises Ltd.

  • 306.
    Si, Shubin
    et al.
    Department of Industrial Engineering, School of Mechatronics, Northwestern Polytechnical University, Xian, China.
    Sun, Shudong
    Department of Industrial Engineering, School of Mechatronics, Northwestern Polytechnical University, Xian, China.
    Liu, Yang
    Department of Production, University of Vaasa, Vaasa, Finland.
    Takala, Josu
    Department of Production, University of Vaasa, Vaasa, Finland.
    Operational Competitiveness of Chinese State-Owned Manufacturing Enterprise in Global Context2008Ingår i: 2008 International Seminar on Business and Information Management, 2008, Vol. 2, s. 397-400Konferensbidrag (Refereegranskat)
    Abstract [en]

    The purpose of this paper is to study the operational competitiveness of Chinese state-owned manufacturing enterprises (CSOME) by analyzing the case CSOME and comparing with other global manufacturing companies in a global manufacturing strategies (GMSS) database. Analytical models are used to analyze the operational competitiveness of the case CSOME based on the weights of the multi-criteria manufacturing strategies. The results show quality is most important competitive priority of the case CSOME and the value of flexibility is very low. The ranking of operational competitiveness implies the case CSOME have some advantages competing in prospector group, however it have some gap comparing with top manufacturing companies of the world.

  • 307.
    Si, Shubin
    et al.
    Department of Industrial Engineering, Northwestern Polytechnical University, Xian, China.
    Takala, Josu
    Department of Production, University of Vaasa, Vaasa, Finland.
    Liu, Yang
    Department of Production, University of Vaasa, Vaasa, Finland.
    Competitiveness of Chinese high-tech manufacturing companies in global context2009Ingår i: Industrial management & data systems, ISSN 0263-5577, E-ISSN 1758-5783, Vol. 109, nr 3, s. 404-424Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose – The purpose of this paper is to study the operational competitiveness and identify the development route of Chinese high‐tech manufacturing companies by comparing with other similar international manufacturing companies of global manufacturing strategies database.

    Design/methodology/approach – The preliminary analytical models for competitiveness analysis are used to analyze the operational competitiveness strategies in three different types of Chinese high‐tech manufacturing companies based on the weights of the multi‐criteria manufacturing strategies, which are calculated using analytic hierarchy process method. Benchmarking between case companies and leading companies of prospector, analyzer and defender groups is applied to evaluate the manufacturing strategies further.

    Findings – As a result of the case studies, it is possible to understand operational competitiveness manufacturing strategies for the case companies, to show one development route for Chinese high‐tech manufacturing companies to be competitive in their markets.

    Practical implications – Chinese high‐tech manufacturing companies have their own operational strategies in different development phase. The different weights of important factors such as quality, cost, time and flexibility make the case companies to have some advantages in prospector, analyzer and defender. The preliminary analytical models are effective for Chinese high‐tech manufacturing companies to calculate their operational competitiveness under the influence of Chinese culture and macro‐control.

    Originality/value – Benchmarking of operational competitiveness is presented to evaluate the manufacturing strategies in this paper. One development route of Chinese high‐tech manufacturing companies, which is under the influence of Chinese culture and macro‐control, is promoted.

  • 308.
    Si, Shubin
    et al.
    Department of Industrial Engineering, Northwestern Polytechnical University, Xian, China.
    Takala, Josu
    Department of Production, University of Vaasa, Vaasa, Finland.
    Liu, Yang
    Department of Production, University of Vaasa, Vaasa, Finland.
    Toshev, Rayko
    Department of Production, University of Vaasa, Vaasa, Finland.
    Tang, Zhi
    Department of Production, University of Vaasa, Vaasa, Finland.
    Operational competitiveness research of chinese high-tech international manufacturing company in global context2008Ingår i: 2008 IEEE International Conference on Industrial Engineering and Engineering Management, Institute of Electrical and Electronics Engineers (IEEE), 2008, s. 1915-1919Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents a thorough case study and analysis aiming at studying operational competitiveness of Chinese high-tech international manufacturing company (CHTIMC). In this paper, some models are applied: (1)analytic hierarchy process (AHP) method is used to analyze questionnaires, which are got from the case CHTIMC, of multi-focused manufacturing strategies; (2)the analytical models, which can calculate the ranking of companyᅵᅵs operational competitiveness in prospector, analyzer and defender groups, are used to find more competitive advantages of CHTIMC;(3) benchmarking between CHTIMC and top companies of prospector and defender is applied to determine the operational competitiveness of CHTIMC further. The analysis results show CHTIMC is more dominant in prospector group; and prove the analytical models of operational competitiveness are effective.

  • 309.
    Skog, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Digital dynamisk geometrisäkring: En kartläggning av dagens arbetssätt2013Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Detta examensarbete innehåller en kartläggning av Scanias arbete med digital dynamisk geometrisäkring samt ett förslag på hur arbetet kan utvecklas.

    Kartläggningen skapar en översiktlig bild av hur dagens arbete utförs och beskriver de ingående delmomenten. Observationer av hur arbetet utförs har gjorts och dokumenterats och samtal med berörda personer på Scania har skapat förståelse för behovet av ett bättre och mer utvecklat arbetssätt.

    Scania vill bli bättre på digital dynamisk geometrisäkring för att kunna minska den idag relativt stora verksamheten med fysisk provning av prototypartiklar och färdiga bilar. Ett förslag till ett nytt arbetssätt har tagits fram och förutsättningar för detta har undersökts på företaget. Förslaget bygger på ett ökat samarbete mellan grupper med olika ansvarsområden kopplade till vilka krav som ställs på lastbilen. Utöver den rent organisatoriska delen innefattar det även mer handgripliga förslag på fortsatt arbete som bland annat behöver ett underlag i form av trovärdiga simuleringsmodeller.

    En jämförelse mellan resultaten från dagens simulering och fysisk provning har genomförts och resultatet visar att vidare arbete med förbättring av de digitala modellerna krävs innan det nya arbetssättet kan anammas tillfullo.

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    Digital dynamisk geometrisäkring
  • 310.
    Skog, Svante
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska högskolan.
    Engberg, Elin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska högskolan.
    Möjligheter och användningsområden för träfiberbaserade material: En materialstudie av plast och träfiber samt utveckling av ett förpackningskoncept med formfrihet2013Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Studien behandlar ämnen som material och utveckling inom plast, kompositer samt träfiberbaserade material som pappersmassa. Förutom materialen bearbetas även produktionsmetoder och miljöaspekter för dessa material. Syftet med undersökningen är att hitta ett material som kan konkurrera med plastegenskaper, och därefter utveckla en produkt i det aktuella materialet.

    Materialstudien visar att bio-kompositer och träfibermaterial inte alltid är miljömässigt bättre än plast. Ska en långlivad produkt tillverkas, är plast ofta ett bättre materialval ur miljösynpunkt än kortlivade träfibermaterial, detta utifrån ett livscykelperspektiv av produkt och användning. Nya träfibermaterial som Durapulp, producerat av Södra, är mer lämpliga för produkter som behöver klara högre påfrestningar men under en kortare livstid, detta på grund av materialets inre nedbrytningsförmåga.

    Materialstudiens resultat exemplifieras genom att utveckla en produkt i materialet Durapulp. Produkten tas fram utifrån materialets egenskaper i syfte att hitta nya användningsområden och potentiella kunder för denna typ av material. Efter undersökningar och idégenereringar anses materialet vara lämpligt till skyddande förpackningar med mervärde.

    Mervärdet för att ta fram en förpackning i Durapulp är att egenskaperna i materialet gör det lämpligt att använda förpackningen även som skyddande fodral både under produktion, transport, distribution samt användning av det förpackade objektet. Detta förlänger livscykeln både för själva förpackningen samt dess innehållande objekt, och minskar därmed miljöpåverkan. Genom att använda Durapulp till en skyddande förpackning kan mervärde uppnås för flera aktörer som påverkar och påverkas av utformningen av en förpackning. Genom att använda en skyddande förpackning i materialet Durapulp kan dessutom den totala mängden emballage minskas vid transporter av produkter.

    En förpackning för goggles (extremsportsskyddsglasögon) får i detta projekt exemplifiera förpackningstänket med det nya materialet vilket även utmanar produktionstekniker för materialet Durapulp. Gogglesförpackningen inspirerats från andra typer av förpackningar, trender och marknader, men har anpassats efter företaget Pocs gogglesutbud och formspråk.

    Resultatet av exemplifierad produkt presenteras som en kombinerad gogglesförpackning och fodral med underlag för produktion, material, 2D-presentationsbilder, 3D-Cad, grafik, finish- och färgval, samt en utskriven 3D-modell. Här ingår även en presentation av troliga problem som kan uppstå inom produktion och förslag på lösningar för dessa.

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    Möjligheter och användningsområden för träfiberbaserade material, E.Engberg S.Skog
  • 311.
    Smeds, Magdalena
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling.
    Implementering av standardiserade vårdförlopp: En genväg in i cancervården2016Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Studien föranleddes av införandet av standardiserade vårdförlopp (SVF) inom cancervården. SVF innehåller riktlinjer för hur utredning och behandlingsrekommendationer av cancerpatienter ska göras med målet att korta väntetiderna från misstanke om cancer till start av behandling.

    Denna studie har bidra med att samla in kunskap om införandet av standardiserade vårdförlopp inom cancervården för att undersöka vilka faktorer som förenklat eller försvårat implementeringen. Kunskapen kan sedan återföras till organisationen, som i det här fallet är Region Östergötland (RÖ), för att bidra till den fortsatta utvecklingen av arbetet med SVF. Även förbättringsområden samt risker och möjligheter med SVF undersöks för att fördjupa kunskapen ytterligare.

    Den teoretiska bakgrunden, teoretiska referensramen, baseras på en litteraturstudie och forskningsansatsen är en fallstudie som utgår ifrån patientfall inom tre cancerdiagnoser. Under fallstudien samlas data in genom observationsstudier, dokumentstudier och intervjuer. Intervjuerna utgår ifrån implementeringsteori där vårdgivare berättar om sina erfarenheter och tankar kring implementeringen och hur det är att arbeta med SVF. Urvalet av vårdgivare är personer verksamma inom primärvård och specialistvård som genom sitt arbete kommer i kontakt med cancerpatienter.

    Riktlinjerna i SVF specificerar hur en cancerutredning ska gå till för varje cancerdiagnos. Till stor del innehåller riktlinjerna alarmsymptom för misstanke om cancer, utredningsprocessen och patientbemötande i processen. Införandet har motiverats av den fragmentering som tidigare tillskrivits vården samt att korta ner de långa väntetider som länge upplevts i cancervården. Implementeringen av riktlinjerna har i RÖ till stor del letts av två projektledare vars uppgift varit att implementera SVF i verksamheten. Uppdraget med implementeringen har utgjorts av införandet nystartad cancerutredningsenhet, Enheten för samordnad cancerutredning (ESCU) samt att stödja primärvården och specialistvården i sitt arbete med att implementera riktlinjerna. I och med införandet av SVF har RÖ valt att utveckla cancervården för att skapa en mer sammanhållen process kring patienten genom att från början göra en vårdprocess som utgår ifrån patientens behov.

    Studien visar att införandet av SVF på det stora hela inte har förändrat arbetssättet för de vårdgivare som arbetar i vårdprocesserna. De största förändringarna kan ses i processförändringar där tidiga delar av vårdkedjan samordnats och omstrukturerats för att skapa ett bättre flöde genom utredningen. Införandet av ESCU har bidragit till en samordnad remissgranskning där patienterna fångas upp för att på ett sömlöst sätt slussas ut till nästa enhet för fortsatt utredning. Införandet av stödverktyg som standardremisser och samtalsmallar har även lett till en ökad informationsspridning mellan vårdgivande enheter och underlättat informationsspridning till patienterna.

    De faktorer som framförallt underlättat implementeringen är att det funnits ett tydligt övergripande ansvar där projektledarna tagit en aktiv roll i implementeringen. De verksamhetsbesök och samtal som projektledarna haft med vårdgivande enheter samt de stimulansmedel som delats ut till regionen anses även ha underlättat implementeringen. Faktorer som istället har försvårat implementeringen är motsättningar från beslutsfattare inne i verksamheten och de inre strukturerna i verksamheten.

    De möjligheter som finns kopplade till implementeringen är ett ökat omhändertagande av patienten där mer jämlik vård, möjlighet att fånga upp svaga patientgrupper tidigt i utredningen och ett ökat patientdeltagande är viktiga delar. Riskerna som framförallt ses som angelägna handlar om undanträngning av andra patientgrupper till fördel för SVF-patienter och att patienter oroas i onödan i och med det tidiga beskedet om misstanke om cancer.

    Studien har även identifierat förbättringsområden där en omstrukturering av de interna IT-systemen, utvecklandet av ett mer standardiserat arbetssätt för de multidisciplinära konferenserna och att samarbeta med primärvården kring den standardiserade remissen är några exempel.

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  • 312.
    Smeds, Magdalena
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling. Linköpings universitet, Tekniska fakulteten.
    Poksińska, Bozena
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling. Linköpings universitet, Tekniska fakulteten.
    Push out, inclusion or exclusion? What are actually the effects of implementing cancer patient pathways in Sweden?2017Konferensbidrag (Refereegranskat)
  • 313.
    Snyder, Hannah
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling. Linköpings universitet, Tekniska fakulteten.
    Witell, Lars
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Företagsekonomi. Linköpings universitet, Filosofiska fakulteten. CTF, Service Research Center, Karlstad University, Sweden.
    Gustafsson, Anders
    CTF, Service Research Center, Karlstad University, Sweden / Norwegian Business School, Norway.
    Fombelle, Paul
    D'Amore-McKim School of Business, Northeastern University, USA.
    Kristensson, Per
    CTF, Service Research Center, Karlstad University, Sweden.
    Identifying categories of service innovation: A review and synthesis of the literature2016Ingår i: Journal of Business Research, ISSN 0148-2963, E-ISSN 1873-7978, Vol. 69, nr 7, s. 2401-2408Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Abstract Service innovation acts as society’s engine of renewal and provides the necessary catalyst for the service sector’s economic growth. Despite service innovation’s importance, the concept remains fuzzy and poorly defined. Building on an extensive and systematic review of 1046 academic articles, this research investigates and explores how service innovation is defined and used in research. Results identify four unique service innovation categorizations emphasizing the following traits: (1) degree of change, (2) type of change, (3) newness, and (4) means of provision. The results show that most research focuses inward and views service innovation as something (only) new to the firm. Interestingly, service innovation categorizations appear to neglect both customer value and financial performance.

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  • 314.
    Sondered, Natasja
    Linköpings universitet. Linköpings universitet, Institutionen för tema, Tema vatten i natur och samhälle.
    New-Institutionalism and how EMS is translated from the highest organisational levels down to its local implementations.2010Studentarbete övrigt, 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Det här arbetet fokuserar på läsare med en bakgrund inom miljö- och kvalitetsledningssystem.Allt fler företag bestämmer sig att arbeta med miljöledningssystem (MLS) och detta har lett till att ISO standarden ökat i popularitet, främst på grund av standardens flexibilitet vilket ses i hur enkelt standarden är att anpassa till olika företag och processer. Majoriteten av MLS-litteratur har en fokus på kommunikation men väldigt få handböcker och författare tar upp frågor i samband med den praktiska implementering och översättning av MLS när det gäller anpassa MLS till något fungerande för organisationens kärnverksamhet.

    Den här kvalitativa studien fokuserar på att analysera de skillnader som finns mellan organisatoriska nivåer när det gäller deras arbete med och implementering av MLS. Studien utfördes inom den teoretiska ram av Nyinstitutionalismen och inom dessa gränser samlades empirin från åtta större företag med olika organisatoriska nivåer. Kombinationen av dessa intervjuer skapar basen för analysen av inter- och intraorganisatoriska MLS-implementeringar. Slutsatsen av den här studien visar att de organisationer som deltog översatte och implementerade deras MLS genom att anpassa pre-existerande rutinerna till att möta standardens krav. En sidoeffekt av den här studien som fanns utanför studiens ursprungliga ram är att organisationer som byggde sitt MLS från grundnivå och uppåt visade sig ha en bättre kommunikation och implementering av deras MLS.

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    FULLTEXT01
  • 315.
    Song, Wenyan
    et al.
    School of Economics and Management, Beihang University, Beijing, China.
    Sakao, Tomohiko
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    A customization-oriented framework for design of sustainable product/service system2017Ingår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 140, s. 1672-1685Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Many manufacturers today are striving to offer high value-added Product/Service System (PSS) due to increasing competition and environmental pressure. PSS design activities face a variety of challenges such as a high level of customization as well as its resulting challenges, i.e., hidden requirements in product use phase, potential conflicts of design attributes, and internal complexity of service processes. However, existing insights for PSS customization are fragmented and insufficient to support manufacturers. Thus, it is necessary to develop a systematic and comprehensive support to solve those issues. In order to support PSS customization in early design phase, this paper proposes a design framework that involves a design process. The proposed design framework is module-based and thus flexible according to the user needs. In addition, it takes advantage of some existing methods. A case study of elevator PSS design shows the feasibility and potentials of the design framework and its associated design process to its broad usage in industry.

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    fulltext
  • 316.
    Srikantha Dath, Adithya
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Optimization of a Floor Grinding Machine for Uniform Grinding Pattern2023Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Husqvarna Construction is one of the leading construction machinery manufacturers in the world. To stay in the forefront, investing in novel methods to model, test & and optimize machinery is crucial. The most important part of development and testing is to bridge the gap between desired and actual results. Model-based Simulation in testing plays a superior role in visualizing possibilities while cutting down the usage of resources.

    Floor Grinders are common in industrial and commercial settings to achieve desired floor results. Like every machinery, optimization towards achieving better results is a necessity. The purpose of this thesis is to develop a methodology to optimize Husqvarna Constructions’s floor-grinding machine through its grinding pattern and further study & gather data about the key indicators for an optimum grinding pattern. This is done by setting up a grinding pattern simulation of the PG 690 floor grinder on SIMGRIND (Husqvarna Construction’s own simulation application).

    A metric was developed to determine whether a grinding pattern is good, and by utilizing the metric as an optimization goal, the impact of different machine parameters on the grinding pattern was established. The grinding & travel speeds were viewed as ratios and it was observed that optimized patterns were attained at particular ratios. Another crucial factor that was studied was the impact of oscillations. Further, the impact of grinding head size on the grinding pattern was also studied.

    The investigation was limited to a simulation study since physical validation opened up several uncertainties beyond the scope of this work. At the end of this work, a few recommendations for developing physical validation setups are made, to test the results of the simulation.

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    Optimization_Floor_Grinding_Husqvarna_adisr531
  • 317.
    Stenlund Nilsson Ivner, Jenny
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska högskolan.
    Municipal Energy Planning: Scope and Method Development2009Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Swedish municipalities are required to produce a municipal energy plan for their energy supply and use. Whether energy planning is suitable to manage local energy systems, however, is subject to debate. This thesis maps municipal energy planning: the scopes of energy plans and whether goals stated in energy plans are fulfilled. It also presents a pilot project with the implementation of an energy planning process where four different decision-making tools were applied: a Citizen’s panel, scenario techniques and quantitative and qualitative environmental assessments. The results from the mapping of energy planning and the experiences from the pilot project are then the bases for a discussion about the effectiveness of energy planning.

    The thesis is based on six papers; five scientific papers and one working paper. The first three papers contribute to mapping municipal energy planning in terms of expressed volition (goals, measures and strategies in the energy plans), whether goals are fulfilled and the extent of environmental analyses and assessments in the plans. The three subsequent papers present the implementation and evaluations of the energy planning process in the pilot project.

    The scopes of the studied energy plans have varied over time and have been adaptive to external factors such as contemporary energy policies and international trends. Environmental analyses and assessments were more commonly occurring in the energy plans adopted between 2006 and 2008 compared to those adopted between 1995 and 1998. The environmental analyses and assessments were however less comprehensive in the newer energy plans. Most positive development, in terms of fulfilled goals, took place for issues within the power of the local authority, for example district heating expansion and energy efficiency measures in public buildings. Experiences from the pilot project showed that decision-making tools can contribute to a broader scope of energy planning, more comprehensive environmental assessments and legitimacy.

    Based on the research findings possibilities for more effective energy planning are discussed. Effectiveness is discussed in terms of scope and legitimacy and how a broad scope and legitimacy are affected by the use of decision-making tools. It is concluded that energy planning has potential for being an effective tool for strategic energy work at the local level. The use of decision-making tools can also contribute to learning as well as legitimacy to energy planning.

    Delarbeten
    1. Municipal Energy Planning and Development of Local Energy Systems
    Öppna denna publikation i ny flik eller fönster >>Municipal Energy Planning and Development of Local Energy Systems
    2003 (Engelska)Ingår i: Applied Energy, ISSN 0306-2619, Vol. 76, nr 1-3, s. 179-187 Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Over the past three decades, Swedish energy policy has evolved in three major stages—oil reduction, phase-out of nuclear energy, renewable energy—each with a different focus. Since 1977, Swedish law has required municipalities to develop an energy plan that addresses the supply, distribution, and use of energy. Whether such plans have contributed to the development of local energy-systems has been a subject for debate. This paper is based on a study of 12 municipal energy-plans that attempted to control and develop local energy-systems in southern Sweden. The analysis examines how municipalities promote oil reduction, efficient energy use, and the use of renewable energy. The plans varied in planning processes, contents, and level of ambition. The results of the study show that the contents of the plans follow the national energy-policies with respect to reduction of oil use, improved energy efficiency, and increased use of renewable energy.

    Ort, förlag, år, upplaga, sidor
    Elsevier, 2003
    Nyckelord
    Energy-planning, National energy, Municipal energy, Environmental impact, Strategies
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-13852 (URN)10.1016/S0306-2619(03)00062-X (DOI)
    Tillgänglig från: 2006-05-30 Skapad: 2006-05-30 Senast uppdaterad: 2009-06-04Bibliografiskt granskad
    2. Volition and Environmental Assessment in Swedish Municipal Energy Plans
    Öppna denna publikation i ny flik eller fönster >>Volition and Environmental Assessment in Swedish Municipal Energy Plans
    2009 (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
    Abstract [en]

    There are several policy instruments for managing energy systems at the local level, for municipal energy planning, which is a means for local authorities to manage the local energy system. This article analyses the municipal Energy Planning which has been required by Swedish law since 1997. Recent energy plans are compared with earlier plans. The aim is to see if recent energy plans are different and if the observed differences can be explained by the impact of external factors, for example other policy instruments.

    The results show that the both the scope of expressed volition and environmental assessments have changed substantially between the two sets of energy plans studied. Newer energy plans include more goals for transports and information, but fewer goals for environmental aspects. Environmental assessments are more commonly occurring in the newer plans, but focus to large extent on emissions of carbon dioxide and climate change. It is concluded that these differences can largely be explained by a rather weak legislation, which allows external factors to influence the energy planning process. It is further concluded that it is important to include environmental assessments in the energy planning process to avoid problem shifting. Such assessments must include more environmental consequences than simply the emissions of carbon dioxide.

    Nyckelord
    Energy planning, environmental assessment, energy policy
    Nationell ämneskategori
    Annan naturresursteknik
    Identifikatorer
    urn:nbn:se:liu:diva-17121 (URN)
    Tillgänglig från: 2011-08-12 Skapad: 2009-03-06 Senast uppdaterad: 2016-02-17Bibliografiskt granskad
    3. New Tools in Local Energy Planning: Experimenting with Scenarios, Public Participation and Environmental Assessment
    Öppna denna publikation i ny flik eller fönster >>New Tools in Local Energy Planning: Experimenting with Scenarios, Public Participation and Environmental Assessment
    Visa övriga...
    2010 (Engelska)Ingår i: Local Environment: the International Journal of Justice and Sustainability, ISSN 1354-9839, E-ISSN 1469-6711, Vol. 15, nr 2, s. 105-120Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    This article describes the development and implementation of an energy planning process in a Swedish municipality. This is a unique full scale test of the application of a number of tools for local planning and environmental assessments. The experiment is based on well-known theoretical knowledge and planning legislation as a “standard of good practice,” and involves a combination of analytical and procedural tools intended to aid decision-making: external scenarios, a citizens’ panel, life cycle analyses and qualitative environmental assessment. The implementation of the energy planning process illustrates that it is important to appoint a municipal work group to lead the process and be the driving force throughout the process. Furthermore, the application of this combination of tools suggests that they contribute substantially to the quality of the energy planning process, but that it is complicated to combine several different decision-making tools. The planning model needs further simplification before it can be used as a standard of good practice by practitioners.

    Nyckelord
    Energy planning, decision-making tools, local authority, LCA, scenarios
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-17122 (URN)10.1080/13549830903527639 (DOI)
    Anmärkning
    This is an electronic version of an article published in: Jenny Stenlund Nilsson Ivner, Anna Björklund, Karl-Henrik Dreborg, Jessica Johansson, Per Wiklund and Hans Wiklund, New Tools in Local Energy Planning: Experimenting with Scenarios, Public Participation and Environmental Assessment, 2010, Local Environment, (15), 2, 105-120. Local Environment is available online at informaworldTM: http://dx.doi.org/10.1080/13549830903527639 Copyright: Taylor & Francis http://www.tandf.co.uk/journals/default.asp Tillgänglig från: 2009-03-06 Skapad: 2009-03-06 Senast uppdaterad: 2017-12-13Bibliografiskt granskad
    4. Energy planning with decision-making tools: Experiences from an energy-planning project
    Öppna denna publikation i ny flik eller fönster >>Energy planning with decision-making tools: Experiences from an energy-planning project
    2009 (Engelska)Ingår i: Local Environment: the International Journal of Justice and Sustainability, ISSN 1354-9839, E-ISSN 1469-6711, Vol. 14, nr 9, s. 833-850Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    This article presents the evaluation of a pilot project where four decision-making tools are applied in a municipal energy planning process in a Swedish municipality. The tested tools are a citizens’ panel, a combination of external scenarios and backcasting, and life cycle assessment and qualitative checklists for environmental assessment. The presented results are based on two focus group discussions with the participants from the project: one with the municipal workgroup and one with the researchers that were responsible for the application of the decision-making tools. The results show that energy planning is a process of learning and dialogue, and workshop methodology was found to be favourable for open dialogue. This test also shows that public involvement can contribute substantially to the visionary work and suggestions of actions and strategies. Another conclusion is that energy planning needs to be iterative, even in the scoping. This test also shows that there is a need for simplified tools that include environmental assessment and broad system boundaries in local energy planning.

    Nyckelord
    Energy planning, local authority, LCA, scenarios, participation
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-17123 (URN)10.1080/13549830903160613 (DOI)
    Anmärkning

    In the list of papers is the title of the article: Energy Planning with Novel Planning Tools - Experiences from an Energy Planning Project This is an electronic version of an article published in: Jenny Stenlund Nilsson Ivner, Energy planning with decision-making tools: Experiences from an energy-planning project, 2009, Local Environment, (14), 9, 833-850. Local Environment is available online at informaworldTM: http://dx.doi.org/10.1080/13549830903160613 Copyright: Taylor & Francis http://www.tandf.co.uk/journals/default.asp

    Tillgänglig från: 2009-03-06 Skapad: 2009-03-06 Senast uppdaterad: 2017-12-13Bibliografiskt granskad
    5. Do decision-making tools lead to better energy planning?
    Öppna denna publikation i ny flik eller fönster >>Do decision-making tools lead to better energy planning?
    2009 (Engelska)Övrigt (Övrigt vetenskapligt)
    Abstract [en]

    This article evaluates the effectiveness of decision-making tools originally designed for environmental issues in an energy planning process in a Swedish municipality. The tested tools include a citizen’s panel, a combination of external scenarios and backcasting, life cycle assessment, and qualitative checklists for environmental assessment. This study concludes that the tools contributed to a broader scope, more comprehensive environmental assessments, and better legitimacy of the energy planning.

    Nyckelord
    Tools, decision-making, energy planning, local authority
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-17124 (URN)
    Tillgänglig från: 2010-06-16 Skapad: 2009-03-06 Senast uppdaterad: 2010-06-16Bibliografiskt granskad
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    Municipal energy planning
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    Cover
  • 318.
    Stolpe, Simon
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system.
    Slycke, Nils
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system.
    Hydraulic pump efficiency test evaluation and improvement: Calculation, presentation and automation2018Självständigt arbete på grundnivå (kandidatexamen), 10,5 poäng / 16 hpStudentuppsats (Examensarbete)
    Abstract [en]

    During this project the method and calculation for a hydraulic axial piston pump efficiency test has been evaluated. There are difficulties in how the maximum displacement of an axial piston pump is defined and this also affects the efficiency calculation of the test. After research about this, a document with improved structure, calculation and presentation of the test data has been developed.

    Suggestions for further improving the test environment and automation of the efficiency test have been presented. To understand and experiment with the test environment, a simulation model has been developed. The first step towards automation would be to measure the drainage flow from the pump in an automated way. Therefore a flow meter that fits for this application has been recommended. 

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  • 319.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Life-cycle Perspectives of Product/Service-Systems: In Design Theory2009Ingår i: Introduction to Product/Service-System Design / [ed] Sakao T. and Lindahl M., London: Springer , 2009, 1, s. 31-49Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Manufacturers are moving more and more towards the business approach of Product/Service Systems in order to achieve greater revenue. Product/Service Systems have many benefits such as achieving closer customer connection and generating increased profit from manufactured products. However, in order to achieve a Product/Service System which is adapted for this business approach, the products and services used need to consider a life-cycle perspective.

    The business approach of Product/Service Systems allows for the provider to control the flows of physical products, both the forward flow to the user and the reverse flow of products back to the provider. This new logic of material/product flows allows for adaptations along the product life-cycle. For example, maintenance and end-of-life strategies such as remanufacturing can become more beneficial due to the new circumstances that product/service systems provide the manufacturer.

    The aim of this chapter is to elucidate how manufacturers can develop their product/service systems with a life-cycle perspective. It shows the many aspects that should be considered throughout the life-cycle of both physical products and services. In addition, several considerations and theories are presented for the different stages of the Product/Service System life-cycle. Finally, this chapter presents theory on product/service design with a life-cycle perspective, which serves as a base for the practical design considerations presented in chapter (ID21) of this book.

  • 320.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Life-cycle Perspectives of Product/Service-Systems: Practical Design Experiences2009Ingår i: Introduction to Product/Service-System Design / [ed] Sakao T. and Lindahl M., London: Springer , 2009, 1, s. 50-70Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Many manufacturers are moving more and more towards the business approach of product/service-systems in order to achieve more revenues. The business approach of product/service-systems puts new requirements on products in comparison to traditional selling. In order to achieve a product/service-system adapted for this business approach, the products and services used need to consider a life-cycle perspective. Having a life-cycle perspective on products and services in the business strategy of product/service-systems is becoming increasingly important as the strategy emerges and more and more companies see the benefits of controlling a larger share of the product value chain. The objective of this chapter is to elucidate how manufacturers have worked with, or could adapt their products for, product/service-systems. Supporting this are results from several case studies, performed at companies that manufacture household appliances, soil compactors and forklift trucks. A key factor when developing products for product/service-systems is to design the product from a life-cycle perspective, considering all the product’s life-cycle phases, e.g. manufacturing, use, maintenance and end-of-life treatment. Several design improvements, all of which are fairly inexpensive and easy to implement, are described. Many of these improvements deal with the accessibility of parts and components during maintenance and remanufacturing operations, and several of the design improvements could reduce the need and cost for maintenance, repair and remanufacturing.

  • 321.
    Sundin, Erik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Dunbäck, Otto
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Reverse logistics challenges in remanufacturing of automotive mechatronics and electronic systems2013Ingår i: Journal of Remanufacturing, ISSN 2210-4690, Vol. 3, nr 2Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The remanufacturing industry as a whole and the automotive sector in particular have, over the years, proven to be beneficial to the environment and economically lucrative to the companies involved as well as to their customers. However, remanufacturing is associated with complicating characteristics, not least to mention the process of core acquisition.

    The automotive industry is one of the earliest adapters of remanufacturing. Parts like engines, brake calipers and servo pumps are common targets for remanufacturing. Modern cars also have several embedded computers, often referred to as electronic control units that communicate, share information and verify each other over a Controller Area Network (CAN) bus. Due to their high value and an increasing trend in the amount of CAN bus mechatronic devices, interest in their remanufacture is growing.

    Previous research has shown that it is preferable that the remanufacturer is an original equipment manufacturer (OEM), or has a close relation to the OEM, in order to achieve a well-performing remanufacturing business. In the automotive industry, there are many small and medium-sized enterprises (SMEs) that perform remanufacturing; for these enterprises, the challenges to have a profitable business are even harder. This is because the OEMs will not release any information on the communication parameters and therefore will not support the independent remanufacturing business. As a consequence, the independent remanufacturers, often SMEs, have to perform substantial reverse engineering.

    This paper presents a qualitative research study, based on interviews at SMEs regarding challenges linked to the reverse logistics of SMEs remanufacturing and trading used automotive mechatronic devices, to identify specific challenges concerning the collection phase of automotive mechatronic remanufacturing. Challenges previously identified by researchers are confirmed, additional challenges within the collection phase are recognized, and challenges expected to arise when remanufacturing and trading automotive electronic CAN bus mechatronic devices are identified. The major concern for the involved companies when commencing future challenges is the handling, transportation and storing of cores. Even though the cores today mainly consist of mechanical devices, these challenges are still present; they are expected, however, to become even more crucial when cores contain a higher degree of mechatronic devices.

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  • 322.
    Sundin, Erik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Monteringsteknik. Linköpings universitet, Tekniska högskolan.
    Ölundh Sandström, Gunilla
    KTH - Royal Institute of Technology.
    Lindahl, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska högskolan.
    Öhrwall Rönnbäck, Anna
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell marknadsföring och industriell ekonomi. Linköpings universitet, Tekniska högskolan.
    Using company-academia networks for improving Product/Service Systems at large companies2009Ingår i: Introduction to Product/Service-System Design / [ed] Sakao T. and Lindahl M., London: Springer , 2009, 1, s. 185-196Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Many manufacturers are shifting focus for different reasons from being providers of mainly physical products, to providing increased services in their customer offerings. Traditionally, the focus at manufacturing companies has been more on product development than service development; this is one reason why it is important for PSS developers to meet others who understand this situation. This chapter describes challenges large PSS providers in Sweden are facing, and how these can be explored and discussed within a Product/Service System company-academia network setting. It is concluded that during the three first years of network meetings, this approach has been a success. In addition, the experiences gained from participation in this network have resulted in recommendations for PSS providers and researchers thinking of starting up similar networks and/or building ones already begun.

  • 323.
    Svanäng, Carl-Johan
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    McLean, Felix
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Flytande radrensare till precisionssåmaskinen Väderstad Tempo: Förstudie och konceptframtagning2016Självständigt arbete på grundnivå (högskoleexamen), 10,5 poäng / 16 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The world population is growing fast and what we all have in common here on earth is that we need food to survive. Väderstad AB develops and manufacture machines that make crop production more efficient for today’s farming. This thesis’ purpose was to improve Väderstad AB’s planter Tempo by developing a floating row cleaner for it. At the time this work took place, row cleaners were bought from external manufacturers. The task was to develop an original design which was supposed to be more efficient and have a lower manufacturing cost than the purchase price for the existing product. To make sure that no solutions to the problem were lost, a systematic concept development method were used throughout the project. The achieved results were complete CAD models of the row cleaner’s design. The design was built up by two discs in V-formation suspended by a parallel linkage. The parallel linkage had an adjustable spring load. Furthermore, prototypes of the discs for the developed row cleaner was manufactured and tested in the field. Good results were achieved and the shape of the discs could be considered ready for production. It turned out that it was possible to develop a row cleaner that can handle most conditions. The proportion of standard components and already existing components at the company that were used in the final design was 67,4 percent. The price of the row cleaner was estimated to 86 percent of the fixed bought one. The alternative solutions that was investigated is also presented in the rapport. Since the project took place during a limited time some parts of the development process were not included. For example, no strength calculations were done, and no drawings were made. Recommendations and material for continued work on the design was handed over to Väderstad AB.

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  • 324.
    Svensson, Marcus
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Haraldsson, Daniel
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Integrating Design Optimization in the Development Process using Simulation Driven Design2019Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This master thesis has been executed at Scania CV AB in Södertälje, Sweden. Scania is a manufacturer of heavy transport solutions, an industry which is changing rapidly in order to meet stricter regulations, ensuring a sustainable future. Continuous product improvements and new technologies are required to increase performance and to meet markets requirements. By implementing design optimization in the design process it enables the potential of supporting design exploration, which is beneficial when products with high performance are developed.

    The purpose was to show the potential of design optimization supported by simulation driven design as a tool in the development process. To examine an alternative way of working for design engineers, elaborating more competitive products in terms of economical and performance aspects. Furthermore, to minimize time and iterations between divisions by developing better initial concept proposals. The alternative working method was developed iteratively in parallel with a case study. The case study was a suction strainer and were used for method improvements and validation, as well as decision basis for the included sub-steps.

    The working method for implementing design optimization and simulation driven design ended up with a procedure consisted of three main phases, concept generation, detail design and verification. In the concept generation phase topology optimization was used, which turned out to be a beneficial method to find optimized solutions with few inputs. The detail design phase consisted of a parameterized CAD model of the concept which then was shape optimized. The shape optimization enabled design exploration of the concept which generated valuable findings to the product development. Lastly the optimized design was verified with more thorough methods, in this case verification with FE-experts.

    The working method was tested and verified on the case study component, this resulted in valuable knowledge for future designs for similar components. The optimized component resulted in a performance increase where the weight was decrease by 54% compared with a reference product.

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  • 325.
    Swärdh, Alma
    et al.
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Hindersson Oddsberg, My
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    The Upside of Upcycling: An Investigation of Construction Waste Materials’ Potential for Upcycling through Material Driven Design2023Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The main objective of this thesis is to show the potential that construction waste materials from Skanska’s projects have for upcycling. Materials are investigated through a comprehensive pre-study and their potential is showcased in developed concepts. Further, this thesis aims at suggesting implementation steps that facilitate circular material handling at Skanska. The conclusions are that waste at construction sites usually occurs from spillage, plethora and provisional installations, and materials suitable for upcycling are metal profiles for indoor and outdoor use, processed and unprocessed wooden planks, pallets, and plywood. Moreover, it is concluded that Skanska’s initial step towards increased circularity within material flows is to create a cross-functional project group to set up future goals and actions. Followingly, suggested areas for the project group to review further is education and knowledge creation, management of logistics and supply chain, external collaborations, and Skanska’s brand image from a sustainability perspective. 

    Skanska is one of the leading project management companies in Sweden, aiming at being climate neutral throughout the entire value system by 2045. This thesis is motivated with background in the amount of emissions caused by production of new materials for construction and building projects. From Skanska’s annual sustainability report it is discerned that over 50 % of CO2 emissions arise from material production. Further, there is great potential in exploring solutions others than recycling for construction waste materials to minimize the sector’s use of resources. How design can be used as a research method to investigate and explore the potential of different waste materials is yet unexplored, which motivates the importance of this work further. General methods such as a literature study, interviews, observations, analysis, and evaluation are used for gathering information and come up with results and conclusions regarding construction materials and sustainability work. Although, the foremost unique research approach in this thesis is Material Driven Design, and since upcycling of waste materials is investigated, Repurpose Driven Design is of great importance as well. The product concepts developed through these approaches are the primary results from this work since they contribute to fulfill the objective. 

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  • 326.
    Söderberg, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska högskolan.
    Reglering av variabel traktorpump2014Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This project is a master thesis at Linköping University with focus on hydraulic  systems. Particularly in mobile hydraulics and electronic control of the load sensing signal on a variable tractor pump. The project has been conducted at Väderstad-Verken AB, Sweden’s biggest manufacturer of soil preparation and seeding equipment for agricultural use. Väderstad is also a well know competitor on the global market and continuously expanding their territory.

    This approach of controlling the load sensing signal, when using a variable tractor pump, is new to Väderstad. Therefore there hasn’t been any research done previous to this project. The reason for trying this way of controlling the load sensing signal is in order to construct a hydraulic system completely inde-pendent of the pump on the tractor. And thereby allowing Väderstad’s imple-ments a more efficient and stable use of the variable hydraulic tractor pump.

    The theoretical results indicate a possibly more stable system when using the electronic control, due to a higher leak flow out of the system volume, generated as a result of the control flow through the electronic control unit. The results from the computerized simulations show that it is possible to create a working load sensing controller when applying required control theory. The practical tests that have been carried out demonstrate how the system seems to be independent of the pump.

    Although, no practical test results are documented or available with traditional load sensing technique used in the same application, which prevents a compari-son of traditional load sensing versus electronic load sensing. Making it difficult to draw conclusions weather the hypothesis is valid or not.

    The greatest difficulties with electronic control of the load sensing signal are related to the software and control theory. Future work involves trying a new digital methodology on the electronic controller, and thereby enhancing the resolution of the control loop when at the same time reducing recovery time after an external disturbance.

  • 327.
    Söderström, Fredrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Weak Governance Leading to Success: Aspects of the National Electronic Identification in Sweden’s Public Sector2012Konferensbidrag (Refereegranskat)
    Abstract [en]

    The aim of this paper is to present a coherent overview of the emergence of the Swedish electronic identification and try to identify any opportunities and/or obstacles. As being a significant part of the public sectors delivery of secure electronic services, this seemingly small technical artifact has an interesting potential of either making or braking the public sectors strive for better and more secure electronic services. As this paper will show, the emergence as such has been successful but seems not to be the product of some kind of product of a long term strategy formulated by the state. It is rather a product of a fruitful synergy between actors in the public sector and market actors driven by a strong belief in its potential by the actors involved. However, this seemingly interest driven approach also seems to have its downside when the state is currently actively trying to bring the field together byforming a new authority strictly focusing on aligning the electronic identification area. Hence, it is obvious that a successful development of a national electronic identification can also be a troublesome one when the aim is to align the actors concerned for future development.

  • 328.
    Taabodi, Amir
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska högskolan.
    Sakao, Tomohiko
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska högskolan.
    Integrating PSS Design Methods with Systems for Customer Value Management and Customer Satisfaction Management2011Ingår i: Functional Thinking for Value Creation: Proceedings of the 3rd CIRP International Conference on Industrial Product Service Systems, Technische Universität Braunschweig,Braunschweig Germany, May 5th - 6th, 2011 / [ed] J. Hesselbach, C. Herrmann, Berlin, Heidelberg: Springer-Verlag , 2011, s. 99-104Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Manufacturers today are increasingly focusing on services and concepts such as Product Service Systems (PSS) and Integrated Product Service Engineering (IPSE) have been getting more attention. On the other hand, there are various existing methods/systems in companies. Some aim at managing customer value or/and customer satisfaction. Based on some empirical results obtained from an attempt to design PSS at a manufacturer in Sweden Customer Received Value (CRV) is defined as an index to integrate Customer Value Management (CVM) and Customer Satisfaction Management (CSM). The results reveal the benefits of using PSS as an approach to manage CVM and CSM.

  • 329.
    Takala, Josu
    et al.
    Department of Production, University of Vaasa, Vaasa, Finland.
    Hirvelä, Jarkko
    Department of Production, University of Vaasa, Vaasa, Finland.
    Liu, Yang
    Department of Production, University of Vaasa, Vaasa, Finland.
    Malindžák, Dušan
    Technical University of Kosice, Kosice, Slovakia.
    Global manufacturing strategies require “dynamic engineers”?: Case study in Finnish industries2007Ingår i: Industrial management & data systems, ISSN 0263-5577, E-ISSN 1758-5783, Vol. 107, nr 3, s. 326-344Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose – The purpose of this paper is to study multifocused global manufacturing strategies under the influence of “China effect” taking the dynamic, complex and situational business strategies into account.

    Design/methodology/approach – This study compares the competitive priorities of manufacturing strategies in four different types of companies with some international comparisons and one longitudinal case study for benchmarking. The analytical hierarchy process method also made it possible to compare inconsistencies in the answers between the companies.

    Findings – As a result of these case studies, it is possible to understand the competitive priorities of manufacturing strategies for the case companies, to show the other companies the route for developments.

    Practical implications – All four types of companies should grow internationally and utilize the developing countries as a means of lowering costs. Each type of company has its own special strategies to suit their markets. Companies in Western countries should utilize multifocused manufacturing strategies based on their business strategy in a holistic way, e.g. through responsiveness, agility and leanness concept, and to specialize through quality, e.g. by differentiating product and service technology for global high dynamic and complex business. Global sourcing in purchasing shall also be more and more used effectively for cost and productivity competitiveness.

    Originality/value – The development steps, from technology specialist to problem solver, are proposed in this paper. Human resources have to be trained to be more “dynamic engineers,” all the time more also in industrial engineering and management.

  • 330.
    Takala, Josu
    et al.
    Department of Production, University of Vaasa, Vaasa, Finland.
    Liu, Yang
    Department of Production, University of Vaasa, Vaasa, Finland.
    Feng, Bin
    Department of Information Technology, Vaasa University of Applied Sciences, Vaasa, Finland.
    Yang, Wenshan
    Department of Production, University of Vaasa, Vaasa, Finland.
    Analytical Evaluation of Sustainable Competitive Advantage2013Ingår i: Elsevier IFAC Publications / IFAC Proceedings series, ISSN 1474-6670, Vol. 46, nr 9, s. 1240-1243Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper introduces a novel idea to model and evaluate the level of sustainable competitive advantage (SCA) in a company’s operations, basing on the development directions of the manufacturing strategy and the effectiveness/sufficiency of its supporting resource allocation. The SCA evaluation model explores whether the real resource allocation supports the desired operations strategy and provide a guidance to help decision makers to find out the sustainability of the company’s current operational competitiveness. The model has been undergoing weak market tests in a multinational case company and the analysis results are promising according to the feedback opinions.

  • 331.
    Tang, Ou
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktionsekonomi. Linköpings universitet, Tekniska fakulteten.
    Liu, Yang
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten. Univ Vaasa, Finland.
    Guo, Zhengang
    Imperial Coll London, England.
    Wei, Shuoguo
    Jiangsu Prov Investment & Management Co Ltd, Peoples R China.
    Refund policies and core classification errors in the presence of customers choice behaviour in remanufacturing2021Ingår i: International Journal of Production Research, ISSN 0020-7543, E-ISSN 1366-588X, Vol. 59, nr 12, s. 3553-3571Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In light of a circular economy, to encourage core returns, the remanufacturer charges a deposit and refund it to the customer based on quality inspection of cores. Generally, two types of classification errors exist and interact with each other during the inspection process: either low-quality cores are sorted as remanufacturable, or high-quality cores are sorted as non-remanufacturable. The remanufacturer needs to choose refund policies and determine a reasonable deposit value, considering customers potential responses. This paper firstly develops analytical solutions for these issues within a game theory framework. The effect of inspection information transparency is evaluated by comparing two settings: the information of inspection errors is available to customers or not. The study results show the advantage of inspection information transparency from the remanufacturers perspective. The analysis indicates the importance of avoiding overestimating customers payoff of products and the significance of inspection accuracy. The study also highlights that the salvage value of different cores significantly influences the remanufacturers profits, and the improvement of inspection accuracy does not necessarily reduce the customers return of low-quality cores.

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  • 332.
    Tarkian, Mehdi
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Persson, Johan
    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.
    Feng, Xiaolong
    ABB Corporate Research, Västerås, Sweden.
    Multidisciplinary design optimization of modular Industrial Robots2011Ingår i: Proceedings of the ASME 2011 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, IDETC/CIE 2011, August 28- 31, 2011, Washington, DC, USA, The American Society of Mechanical Engineers (ASME) , 2011, Vol. 5, s. 867-876Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents a multidisciplinary design optimization framework for modular industrial robots. An automated design framework, containing physics based high fidelity models for dynamic simulation and structural strength analyses are utilized and seamlessly integrated with a geometry model.

    The proposed frameworkutilizes well-established methods such as metamodeling and multi-level optimization inorder to speed up the design optimization process. The contributionof the paper is to show that by applying amerger of well-established methods, the computational cost can be cutsignificantly, enabling search for truly novel concepts.

  • 333.
    Tarkian, Mehdi
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Persson, Johan
    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.
    Feng, Xiaolong
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Multidisciplinary Design Optimization of Modular Industrial Robots by Utilizing High Level CAD templates2012Ingår i: Journal of mechanical design (1990), ISSN 1050-0472, E-ISSN 1528-9001, Vol. 134, nr 12Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents a multidisciplinary design optimization (MDO) framework for automated design of a modular industrial robot. The developed design framework seamlessly integrates High Level CAD templates (HLCt) and physics based high fidelity models for automated geometry manipulation, dynamic simulation, and structural strengthanalysis. In the developed framework, methods such as surrogate models and multilevel optimization are employed in order to speed up the design optimization process. This work demonstrates how a parametric geometric model, based on the concept of HLCt, enables a multidisciplinary framework for multi-objective optimization of a modular industrial robot, which constitutes an example of a complex heterogeneous system.

  • 334.
    Tarkian, Mehdi
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Vemula, Bhanoday
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Feng, Xiaolong
    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.
    Metamodel Based Design Automation – Applied on Multidisciplinary Design Optimization of Industrial Robots2012Ingår i: Proceedings of the ASME InternationalDesign Engineering Technical Conferences & Computers and information in Engineering Conference,Washington, USA, Aug 2012, 2012, s. 833-845Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Intricate and complex dependencies between multiple disciplines require iterative intensive optimization processes. To this end, multidisciplinary design optimization (MDO) has been established as a convincing concurrent technique to manage inherited complexities.

    This paper presents a high level CAD and CAE design automation methodology which enables fast, efficient concept generation for MDO. To increase the evaluation speed, global metamodels are introduced to replace computationally expensive CAD and CAE models. In addition, various techniques are applied to drastically decrease the number ofsamplings required to create the metamodels. In the final part of the paper, a multi-level optimization strategy is proposed to find the optimal concept.

    As proof of concept, a real world design problem, from ABB industrial robotics, is presented.

  • 335.
    Tarkian, Mehdi
    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.
    Feng, Xiaolong
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Pettersson, Marcus
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Product Platform Automation for Optimal Configuration of Industrial Robot Families2011Ingår i: Proceedings of the 18th International Conference on Engineering Design (ICED11), Vol. 4, 2011, s. 1-10Konferensbidrag (Refereegranskat)
    Abstract [en]

    Product platform design is a well recognized methodology to effectively increase range and variety of products and simultaneously decrease internal variety of components by utilizing modularization. The tradeoff between product performance and product family commonality has to be carefully balanced in order to for the company to meet market requirements and simultaneously obtain economy of scale. This paper presents a framework based on high fidelity analyses tools that concurrently optimize an industrial robot family as well as the common platform. The product family design problem is formally stated as a multi-objective optimization problem, which is solved using a multi-objective Genetic Algorithm.

  • 336.
    Tell, Fredrik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Företagsekonomi. Linköpings universitet, Filosofiska fakulteten.
    Bengtsson, Lars
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska högskolan.
    Lakemond, Nicolette
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Projekt, innovationer och entreprenörskap. Linköpings universitet, Tekniska fakulteten.
    Laursen, K
    Knowledge integration across boundaries in open innovation2015Konferensbidrag (Refereegranskat)
  • 337.
    Teodorsson, Carl-Philip
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Processautomation med robot: En studie av möjligheter till automation av en hårdlödningsprocess2021Självständigt arbete på grundnivå (kandidatexamen), 10,5 poäng / 16 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This report is a Bachelor thesis and has been done within the area of mechanical engineering at Linköping university. The thesis has been performed as a project upon request from the company Bosch Thermoteknik AB in Tranås, Sweden. The company produces heat pumps, and in the process, brazing is used as a method to build the pipe modules the pumps contain. The brazing is currently made in terms of craftmanship in the production at the company. The purpose of this project was to investigate the possibilities to automate a brazing process and present a possible solution the company can use. The solution should mainly be based on the use of an industrial robot together with an equipment for induction heating.An iterative concept-generating process for production development was used as method to perform the project. Based on the method, a result consisting of two main areas were acquired. The first area was a study of the prerequisites for the project – the process demands and a review of the technique the resources used. The other area was the concept solution for how a brazing process can be automated.The concept itself was built by two areas. One physical part in the shape of a fixture to carry the pipe-modules during the process as well as tools and aids for the robot function. The other area was the program that forms the robot’s function. The program was based on solutions to enable identification of the modules, positioning of the robot arm with tool and a verification part to ensure the brazing has been done. The robot program was founded on a written program script to control the robot.

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  • 338.
    Thawesaengskulthai, Natcha
    et al.
    Chulalongkorn University, Thailand.
    Wongrukmit, Patcharin
    Chulalongkorn University, Thailand.
    Dahlgaard, Jens Jörn
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling. Linköpings universitet, Tekniska fakulteten.
    Hospital service quality measurement models: patients from Asia, Europe, Australia and America2015Ingår i: Total Quality Management and Business Excellence, ISSN 1478-3363, E-ISSN 1478-3371, Vol. 26, nr 9-10, s. 1029-1041Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study explores how service quality in hospitals is perceived and measured among different groups of patients from four major continents (i.e. Asia, Europe, Australia and North America) who came to receive medical services in Thailand. Using stratified random sampling, data were collected from 2189 patients from 80 countries and four continents at six hospitals which provide healthcare services to international patients in Thailand. Four different models of measuring service quality based on different continents were developed with different numbers of quality dimensions and also a variation in the number of quality attributes. Asian patients provided a four-dimension model with 20 items; while a two-dimension model with 16 items was identified for European patients. Australian patients also revealed a two-dimension model but with 22 items, while patients from America provided a three-dimension model, also with 17 items. The study reveals that the development of service quality measurement models should not only consider context-specific items such as size and location, but should also include the nationality and demographic of the patient population. The findings also support that service quality has a significant impact on service satisfaction and the retention level of customers at the hospital. The concluded frameworks may guide healthcare providers to deliver better quality healthcare services and to sustain competitiveness.

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  • 339.
    Thorslund, Gustav
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Stroller Service System: How to make customer products sustainable within the planetary boundaries - using the case product ‘stroller’, PSS and a Design Thinking approach2019Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Physical customer products have an environmental impact, such as greenhouse gas emissions, due to the use of virgin resources from cradle-to-grave, especially when the origin of the material is from fossil resources. This thesis aims to create a circular business model, by investigating the product ‘stroller’ and place it in a Product Service System, where the user subscribes to the Stroller Service System. This means that the product gets a service function: ‘transportation of a child’, mapped with a user-centered approach. The main objective is to lower the ecological footprint by adopting a modular design including bio-based material and stainless steel, and also include services to address economical and social sustainability goals. The methodology that is used is divided into two parts: Status Analysis – which consists of stroller related literature study, literature review and case study, and the second part is the Design Process – creating the product-, service- and system design. The results are grounded in user insights, life cycle assessment and co-creation with experts, where the conclusions are that a PSS Model Stroller should be used by 4-6 users which translate to about 15-20 years of usage for the steel layer. The way of refurbishing the strollers is done by contract workers that exist where the users exists, i.e. Ease Stroller Hub, who change the bio-based material in-between the use-phases and hands over the refurbished stroller to the next user. Add-on services of access to car pools and grocery delivery is included in the system to ease the stroller user’s everyday life and is a way to designing out the need of owning a car, to lower the overall environmental impact.

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  • 340.
    Thunberg, Micael
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Kommunikations- och transportsystem. Linköpings universitet, Tekniska fakulteten.
    Fredriksson, Anna
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Kommunikations- och transportsystem. Linköpings universitet, Tekniska fakulteten.
    Supplier and contractor perspectives on supply chain planning problems in construction: A multiple case study2015Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Construction supply chain planning (SCP) is often associated with problems. An earlier study categorized the problems into material flow, communication, and complexity. The purpose of this study is to identify different construction supply chain actors’ perspectives on these SCP problems. Results show that all actors identify the problems but there are diverse opinions on their origin and cause. Links between the executional problems the site managers see and the SCP development problems seen by others are identified. One contribution is the importance of SCP in an early phase of the project including also actors outside the contractor. 

  • 341.
    Tozzi de Cantuaria Gama, Artur
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    Heybroek, Kim
    Volvo CE.
    Ericson, Liselott
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    A Novel Multi-pump System for Hydraulic Actuation in Electric Mobile Machinery2022Konferensbidrag (Refereegranskat)
    Abstract [en]

    An observable trend nowadays is the change in the prime movers of mobile heavy machinery to electric alternatives to achieve more eco-friendly equipment. These solutions often require large and heavy batteries with limited capacity, making the research of more efficient components and the development of different system architectures an important topic of study. Hydraulic actuation is still a relevant application for these vehicles because of its reliability, controllability, and high power density. The electrification and digitalization of mobile machinery allow for innovative designs and control strategies to be implemented that take advantage of electro-hydraulic systems and their characteristics. Similar research has shown that a higher number of degrees of freedom allow for the system to operate with higher total efficiency. This paper introduces a novel actuation architecture that combines multiple fixed displacement hydraulic pumps and on/off directional valves to control the position and force of two hydraulic actuators for the working functions of a mobile machine. Each pump is powered by a variable speed electric drive so that each one can be operated independently, and together with the set of directional valves, allows the selection of different combinations of pumps and flow sharing between the actuators’ chambers to achieve the desired flow and pressure on each cylinder. The multi-pump system favours the use of smaller pumps, and the possibility of combining their flows reduces the need to operate the components at lower efficiency points such as partial displacement. At the same time, controlling the pumps’ flow through the variable-speed electric motors means that throttling valves are not needed. The development of this architecture will allow for its use in mathematical models to analyse its behaviour and efficiency and to obtain insights regarding points of improvement in the system architecture.

  • 342.
    Tozzi de Cantuaria Gama, Artur
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    Heybroek, Kim
    Volvo Construction Equipment AB, Eskilstuna, Sweden.
    Ericson, Liselott
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    An Analysis of a Multi-Pump System for Actuator Operation in Electric Mobile Machinery2023Ingår i: ASME/BATH 2023 Symposium on Fluid Power and Motion Control - FPMC2023, The American Society of Mechanical Engineers , 2023Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents an analysis of a multi-pump solution for a hydraulic cylinder for application in mobile machinery with electric prime movers. The flexibility provided by using electric motors instead of an internal combustion engine allows for the design of alternative hydraulic architectures that remove the need for a centralized pumping system and support more direct control of individual components. This allows them to operate at a higher efficiency region to improve overall vehicle efficiency, leading to smaller batteries and shorter or less frequent recharge periods. To evaluate the capabilities of this proposal, this paper focuses on a backward calculation analysis of a single actuator operating with multiple pump/motors connected to each chamber. A series of hydraulic machines with fixed displacement and identical sizes are connected to the actuator chambers through on/off directional valves. The system controls the flow by using the required pumps and selecting their optimal speeds to minimize energy consumption or maximize energy recovery. The results show how the number of pumps affects the system’s performance and provide insights regarding the selection of operating machines according to the actuator speed and force.

  • 343.
    Trygg, Marvin
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Röding, Matthias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Ett steg närmare Just-in-Time: En studie av JIT-försörjning vid GGP Sweden AB2010Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Den här studien undersöker möjligheten, samt lönsamheten, i att bredda ett pilotprojekt som genomförts vid GGP Sweden AB i Tranås, ett varuproducerande företag som tillverkar åkgräsklippare. Det genomförda pilotprojektet grundar sig i att GGP ska få en mer precis styrning av materialförsörjningen från sina leverantörer, vilket visat sig ha många likheter med den japanska Just-in-Time filosofin.

    Studien har delats upp i fyra separata områden; kartläggning, leverantörsval, uppföljning och kostnadsanalys. De representerar ett helhetsperspektiv inför breddningen av pilotprojektet som täcker upp allt ifrån att finna lämpliga JIT-leverantörer, konstruera nyckeltal, granska kostnader till att bedöma lönsamhet.

    I rapporten kommer läsaren att få ta del av hur GGP:s produktionsanläggning, pilotprojekt och leverantörsbas kartläggs med resultatet att en lista med lämpliga leverantörer att bredda pilotprojektet med erhålls. Därefter leds läsaren efter resonemang kring leverantörsval och utvärdering in i området uppföljning, där fem stycken nyckeltal skapas med avsikten att säkerställa att GGP kan utvärdera sina leverantörer och sitt pilotprojekt på ett effektivt sätt. De rekommenderade nyckeltalen är

    • leveransprecision
    • kvantitetsprecision
    • kvalitetsprecision
    • kapitalbindning
    • lageromsättningshastighet.

    När ett antal leverantörer identifierats som lämpliga till att bredda pilotprojektet med och GGP:s möjlighet till tillfredsställande uppföljning säkerställts utförs en kostnadsanalys på en utav de lämpliga JIT-leverantörerna. Kostnadsanalysen påvisar att en breddning av pilotprojektet inte är lönsamt ur ett kostnadsmässigt perspektiv på grund av att den ökade transportkostnaden överväger de besparingar som fås av att bland annat lagernivåerna kan minskas.

    Rapporten avslutas med att ett antal övriga rekommendationer ges till GGP samt att förslag ges till områden för fortsatta studier inom samma område som denna studie berört.

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    FULLTEXT01
  • 344.
    Velpanur, Shashank
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Kvalitetsteknik. Linköpings universitet, Tekniska högskolan.
    Development of methods and tools for monitoring and analyzing customer data2013Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The market in today’s world is dominated by customers and their requirements. Customer feedback is essential for manufacturing companies trying to establish a foothold in the service environment. New product development is often recognized as the trump card held by most manufacturing companies that allow them to gain a competitive edge over their rivals in the market. Utilizing customer’s feedback in new product  development is a step that many companies are taking to be able to satisfy customer needs and requirements which enables the companies to firstly, retain the customers and secondly, bring in new business. Interviewing customers for feedback is a very common method employed by service companies to be able to capture and store data which is then analyzed to identify any patterns emerging i.e. any particular features preferred, any features disliked, etc. This thesis uses interviews as a method to be able to capture feedback from the customers which can then be utilized in new product development.

    The basis of this thesis is formed by developing a method for analyzing and monitoring customer data. The customer perceives a product or a service based on his/ her experience in using it and hence forms an opinion on it. This thesis mainly focuses on interacting with internal operators (Volvo CE employees who participated in a previous measurement) to understand and collect their feedback of the product, the L220F wheel loader, as an example to develop the method, due to the fact that “real” customers are not as easy to reach and interview. The data collected will then be compared to logged data of the product usage by these operators. Finding a correlation between the answers to the interviews and the measured data will help identify the gaps in how the wheel loader is used by operators of different skill levels and how it can be used. If successful, this method can then be utilized on external customers of Volvo CE and also on other products manufactured by Volvo CE.

    The conclusions drawn from this thesis are that while all customers must be equally considered while taking feedback, whether they are professionals or rookies, Volvo CE should rate their answers differently while designing a new product to meet customer requirements. Also, what could be seen from the clustering is that more heterogeneous groupings of operators are formed wherein no one cluster is made up of purely one class of operators.

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    Master Thesis - Shashank
  • 345. Beställ onlineKöp publikationen >>
    Vidner, Olle
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    On Multi-Disciplinary Optimization in Engineer-to-Order Product Configuration2023Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Customized products are becoming increasingly common, and increasingly important for maintaining a competitive advantage in certain industries. Being able to quickly and accurately respond to unique customer requirements can provide a competitive edge or even be the only path to survival. In practice, configurators are commonly used to manage the customization process, gathering the customer’s requirements and suggesting feasible solutions to the customer’s problem.

    Fostering and maintaining a viable product customization offering is not easy. A particularly challenging category of products is one where an extensive engineering effort might be needed to even produce a reliable estimate of the product’s price. These products are usually referred to as engineer-to-order (ETO) products.

    Prior work has pointed out the potential of using optimization as part of configuration solutions for ETO products, but the literature is limited in its extent and does not clearly prescribe how to structure and approach such solutions.

    This thesis outlines a conceptual and technical architecture for implementing optimization-based configuration solutions. Reusable primitives for supporting the routines involved in this architecture are provided. These findings are verified through application and evaluation within two industrial case studies, also yielding important industrial needs to cover in the future research and development of the proposed framework. By examining three additional case studies, common issues in the development and deployment of design automation (DA) systems are identified.

    Successful implementation of the proposed framework for optimization-based configurators can lead to two main benefits. First, engineering configurator prototypes can be developed rapidly, to test the viability of configurator projects – a category of projects prone to expensive failures. Second, optimization-based configurators can be used to support rapid design space exploration in early product development stages, leading to enhanced product knowledge in a critical phase, and in turn, increased product value.

    Delarbeten
    1. Configuring Customized Products with Design Optimization and Value-Driven Design
    Öppna denna publikation i ny flik eller fönster >>Configuring Customized Products with Design Optimization and Value-Driven Design
    2021 (Engelska)Ingår i: Proceedings of the Design Society, Cambridge University Press, 2021, Vol. 1, s. 741-750Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    In order to efficiently design and deliver customized products, it is crucial that the process of translating customer needs to engineering characteristics and into unique products is smooth and without any misinterpretations. The paper proposes a method that combines design optimization with value-driven design to support and automate configuration of customized products. The proposed framework is applied to a case example with spiral staircases, a product that is uniquely configured for each customer from a set of both standard and customized components; a process that is complex, iterative and error-prone. In the case example, the optimization and value-driven design models are used to automate and speed-up the process of delivering quotations and design proposals that could be judged based on both engineering characteristics as well as their added value, thereby increasing the knowledge at the sales stage. Finally, a multi-objective optimization algorithm is employed to generate a set of Pareto-optimal solutions that contain four clusters of solutions that dominate the baseline design. Hence the decision-maker is given a set of optimal solutions to choose from when balancing different economical and technical characteristics.

    Ort, förlag, år, upplaga, sidor
    Cambridge University Press, 2021
    Nationell ämneskategori
    Annan maskinteknik
    Identifikatorer
    urn:nbn:se:liu:diva-181577 (URN)10.1017/pds.2021.74 (DOI)
    Konferens
    23rd International Conference on Engineering Design (ICED)
    Tillgänglig från: 2023-01-13 Skapad: 2023-01-13 Senast uppdaterad: 2023-05-15
    2. Multidisciplinary Design Optimization of a Mobile Miner Using the OpenMDAO Platform
    Öppna denna publikation i ny flik eller fönster >>Multidisciplinary Design Optimization of a Mobile Miner Using the OpenMDAO Platform
    2021 (Engelska)Ingår i: Proceedings of the Design Society, Cambridge University Press, 2021, Vol. 1, s. 2207-2216Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    This paper proposes an optimization framework based on the OpenMDAO software library intended for engineer-to-order products and applies it to the conceptual design of a Mobile Miner. A Mobile Miner is a complex machine and a flexible alternative to Tunnel Boring Machines for small-scale tunneling and mining applications. The proposed framework is intended for use in early design and quotation stages with the objective to get fast estimates of important product characteristics, such as excavation rate and cutter lifetime. The ability to respond fast to customer requests is vital when offering customized products for specific applications and thereby to stay competitive on the global market. This is true for most engineer-to-order products and especially for mining equipment where each construction project is unique with different tunnel geometries and rock properties. The presented framework is applied to a specific use-case where the design of the miner's cutter wheel is in focus and a set of Pareto optimal designs are obtained. Furthermore, the framework extends the capabilities of OpenMDAO by including support for mixed-variable formulations and it supports an exploratory approach to design optimization.

    Ort, förlag, år, upplaga, sidor
    Cambridge University Press, 2021
    Nyckelord
    Optimisation, Multi- / Cross- / Trans-disciplinary processes, Large-scale engineering systems, Mobile Miners
    Nationell ämneskategori
    Annan maskinteknik
    Identifikatorer
    urn:nbn:se:liu:diva-181578 (URN)10.1017/pds.2021.482 (DOI)
    Konferens
    23rd International Conference on Engineering Design (ICED), Gothenburg, Sweden, 16th - 20th August, 2021
    Tillgänglig från: 2023-01-13 Skapad: 2023-01-13 Senast uppdaterad: 2023-05-15Bibliografiskt granskad
    3. Design automation systems for the product development process: Reflections from Five Industrial Case Studies
    Öppna denna publikation i ny flik eller fönster >>Design automation systems for the product development process: Reflections from Five Industrial Case Studies
    2022 (Engelska)Ingår i: Proceedings of the Design Society, Cambridge University Press, 2022, Vol. 2, s. 2533-2542Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    This paper presents five industrial cases where design automation (DA) systems supported by design optimization has been developed, and aims to summarize the lesson learned and identify needs for future development of such projects. By mapping the challenges during development and deployment of the systems, common issues were found in technical areas such as model integration and organizational areas such as knowledge transfer. The latter can be seen as a two-layered design paradox; one for the product that the DA system is developed for, and one for the development of the DA system.

    Ort, förlag, år, upplaga, sidor
    Cambridge University Press, 2022
    Nationell ämneskategori
    Maskinteknik
    Identifikatorer
    urn:nbn:se:liu:diva-193622 (URN)10.1017/pds.2022.256 (DOI)
    Konferens
    17th International Design Conference (DESIGN2022), May 23-26, 2022
    Tillgänglig från: 2023-05-09 Skapad: 2023-05-09 Senast uppdaterad: 2023-05-16Bibliografiskt granskad
    Ladda ner fulltext (pdf)
    fulltext
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    presentationsbild
  • 346.
    Vidner, Olle
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Pettersson, Robert
    Epiroc Rock Drills AB.
    Persson, Johan
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Ölvander, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Multidisciplinary Design Optimization of a Mobile Miner Using the OpenMDAO Platform2021Ingår i: Proceedings of the Design Society, Cambridge University Press, 2021, Vol. 1, s. 2207-2216Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper proposes an optimization framework based on the OpenMDAO software library intended for engineer-to-order products and applies it to the conceptual design of a Mobile Miner. A Mobile Miner is a complex machine and a flexible alternative to Tunnel Boring Machines for small-scale tunneling and mining applications. The proposed framework is intended for use in early design and quotation stages with the objective to get fast estimates of important product characteristics, such as excavation rate and cutter lifetime. The ability to respond fast to customer requests is vital when offering customized products for specific applications and thereby to stay competitive on the global market. This is true for most engineer-to-order products and especially for mining equipment where each construction project is unique with different tunnel geometries and rock properties. The presented framework is applied to a specific use-case where the design of the miner's cutter wheel is in focus and a set of Pareto optimal designs are obtained. Furthermore, the framework extends the capabilities of OpenMDAO by including support for mixed-variable formulations and it supports an exploratory approach to design optimization.

  • 347.
    Vidner, Olle
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Wehlin, Camilla
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Persson, Johan
    Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering.
    Ölvander, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Produktrealisering. Linköpings universitet, Tekniska fakulteten.
    Configuring Customized Products with Design Optimization and Value-Driven Design2021Ingår i: Proceedings of the Design Society, Cambridge University Press, 2021, Vol. 1, s. 741-750Konferensbidrag (Refereegranskat)
    Abstract [en]

    In order to efficiently design and deliver customized products, it is crucial that the process of translating customer needs to engineering characteristics and into unique products is smooth and without any misinterpretations. The paper proposes a method that combines design optimization with value-driven design to support and automate configuration of customized products. The proposed framework is applied to a case example with spiral staircases, a product that is uniquely configured for each customer from a set of both standard and customized components; a process that is complex, iterative and error-prone. In the case example, the optimization and value-driven design models are used to automate and speed-up the process of delivering quotations and design proposals that could be judged based on both engineering characteristics as well as their added value, thereby increasing the knowledge at the sales stage. Finally, a multi-objective optimization algorithm is employed to generate a set of Pareto-optimal solutions that contain four clusters of solutions that dominate the baseline design. Hence the decision-maker is given a set of optimal solutions to choose from when balancing different economical and technical characteristics.

  • 348.
    Wahlund, Patrik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Sjögren, Patrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Studie av informationsöverföring mellan konstruktion och produktion2016Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Detta examensarbete ämnar undersöka hur informationsöverföringen av produktrelaterad data sker i industrin för att kunna ge förbättringsförslag för Linköpings Universitets CAD- och ritteknikskurser. Detta för att kurserna bättre ska spegla industrins nuvarande och även framtida behov. Examensarbetet utfördes på avdelningen maskinkonstruktion vid Linköpings Universitet och är det avslutande momentet på författarnas civilingenjörsutbildning i maskinteknik.Till att börja med utfördes en litteraturstudie. Detta för att ge kunskap inom det aktuella området och vilka metoder som kan användas för datainsamling och analys. För att undersöka hur industrins arbetssätt ser ut utfördes en flerfallstudie på sju olika företag som bedriver produktutveckling tillsammans med egen produktion. Som datainsamlingsmetod valdes semistrukturerade intervjuer med anställda på de olika företagen.Analysen utfördes med hjälp av en adaption av ”affinity diagram technique” vilket delade upp företagens svar i kategorier i form av påståenden. Dessa jämfördes mellan företagen med hjälp av tabeller eftersom det var tydligt sätt att representera resultatet. För att ge en inblick i hur varje enskilt företag arbetar utarbetades även en deskriptiv sammanfattning av varje företag.För att kunna ge förbättringsförslag till universitetets CAD- och ritteknikskurser granskades några av de nuvarande kursernas kursplaner. Detta tillsammans med en informell intervju av de kursansvariga ledde till bättre insikt om hur kurserna är uppbyggda och vad målen med dem är. Insikten om vad kurserna innehåller i dagsläget tillsammans med analysen av de studerade företagens arbetssätt bidrog till att ett antal förbättringsförslag kunde föreslås.Det visade sig att graden av användande av modernare arbetssätt varierar kraftigt bland företagen. Detta gjorde det svårt att komma fram till ett enhetligt resultat som gällde för alla de studerade företagen. Däremot kunde ett antal slutsatser dras. Bland annat används fortfarande 2D-ritningar flitigt som ett informationsbärande dokument. En övergång till att enbart använda 3D-modellen som informationsbärare noterades endast på ett utav företagen men nämndes på ett par andra.Papperslöst arbete verkar vara på frammarsch trots att vissa specifika moment fortfarande utförs på papper. Det noterades även att digitala system används för lagring och hantering av produktrelaterad information hos alla de studerade företagen.Det som ansetts värt att implementera i universitets obligatoriska kurser efter genomförd studie är främst ökad användning av PDM/PLM-system, introduktion av 3D-måttsättning samt utnyttjande av 3D-modellen vid tillverkning.

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    fulltext
  • 349.
    Wallerius, Joel
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik.
    Zakrisson, Marcus
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik.
    Green Supply Chain Management in Thailand: An Investigation of the Use in the Electrical and Electronics Industry2010Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The objective with this thesis is to clarify the advantages - both economic and environmental - that companies in the Thai electronic manufacturing industry can draw from managing their supply chain and adding a green aspect to it. This through investigations of the concept known as Green Supply Chain Management (GSCM). The research will assist companies with scarce knowledge of green supply chain management in making decisions and priorities in that area.

    Semi-structured interviews were performed on sight in Bangkok, Thailand and surrounding region. These provided insight and knowledge of the situation and today-state regarding environmental awareness and GSCM implementation within the Thai Electrical and Electronics Industries. Interviews were performed with representatives and experts from different sectors – from universities, industry and supporting agencies and serve as the foundation for the research.

    A model has been developed out of previous research and findings that could suit the Thai industry. This model can be seen as guidelines in the work towards becoming green and aims at continuous improvement of the organizations environmental performance.

    In Thailand today companies do not see the benefits of themselves review their organizations environmental impact or developing in this area. Environmental awareness among the public is low and the lack of demand for green products result in few drivers for companies to become green. Also the lack of proper legislation and compliance audits are part of the problem. Missing environmental education and knowledge are extensive and improvements needed. The concept of GSCM is not wide spread but popularity is increasing steadily. Some environmental initiatives are though performed in the industry but not under the name of the concept. Customer demands, legislation and education should be the main focus areas for developing the industry.

    From the today state at a very basic low much is to be done. Fear of large investments, cost and the lack of knowledge are obstacles to the development. This research shows that these concerns are to be avoided. And by following the model in this thesis companies can find proper knowledge in the area of GSCM. Concluded is that with understanding of the concept and proper implementation from the right knowledge Thai companies can gain great advantages in the future - both economical and environmental.

    Ladda ner fulltext (pdf)
    GSCMinThailand_WalleriusZakrisson
  • 350.
    Wang, Wenke
    et al.
    Sichuan Univ, Peoples R China.
    Feng, Linyun
    Sichuan Normal Univ, Peoples R China.
    Zheng, Tao
    Sichuan Normal Univ, Peoples R China; Xichang Minzu Preschool Normal Coll, Peoples R China.
    Liu, Yang
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten. Univ Vaasa, Finland.
    The sustainability of ecotourism stakeholders in ecologically fragile areas: Implications for cleaner production2021Ingår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 279, artikel-id 123606Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The research on ecotourism has attracted much attention in recent years with the increasing awareness of sustainable development and environmental protection. In the development and construction of ecotourism in ecologically fragile areas, however, conflicts of interest between stakeholders often negatively affect the efficiency and effectiveness of ecotourism construction. This paper applied evolutionary game theory to analyse the evolutionary stable strategies of local governments, tourism enterprises and residents in the development and construction of ecotourism in ecologically fragile areas, to explore the mechanism that influences the sustainable development policies. The evolutionary stable strategies of the game were calculated and the dynamic simulation of the model was also discussed by using a system dynamics method to analyse the stability of interaction among the stakeholders and determine an equilibrium solution. The simulation results showed that the strategic choices of the three stakeholders fluctuate repeatedly, which indicated that there was no evolutionary stability strategy in the interaction among the current stakeholders. Therefore, an optimized dynamic penalty-incentive control method was proposed to control the fluctuation, after which the simulation results showed that the optimized dynamic penalty-incentive control method can not only effectively suppress the fluctuation but also obtain an ideal evolutionary stable strategy. Then, the cooperation mode can be changed from any original status into the desired target. This research provides valuable information for the design of appropriate policies and business models to coordinate the interests of stakeholders and promote the development of ecotourism, as well as contributes to the environmental and sustainability research and practice. (c) 2020 Elsevier Ltd. All rights reserved.

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