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Modelling of means in conceptual design
Linköping University, Department of Mechanical Engineering, Machine Design. Linköping University, The Institute of Technology.
2002 (English)In: Proceedings of the 7th International Design Conference. Vol. 1 / [ed] Marjanovic, D., Zagreb: Faculty of Mechanical Engineering and Naval Architecture , 2002, 579-584 p.Conference paper, Published paper (Refereed)
Abstract [en]

The systematic design approach proposes functional decomposition as a central element of conceptual design [Pahl; Beitz 1999]. This paper treats the objects used during conceptual design of such a systematic design process on the example of several student projects. It is commonly agreed upon that the choice of an adequate concept is crucial for the following embodiment and detail design phases, as a bad principle solution cannot be compensated even by a good detail design. Tools for concept generation are available, but often paper-based, e.g. design catalogues [Roth 2001], and not optimal regarding quick access and large amounts of information. "Building blocks" of principle solution elements with higher degree of aggregation suitable for search and reuse are desired, but require the prior knowledge of how objects of conceptual design, and specifically means, can be modelled.

Place, publisher, year, edition, pages
Zagreb: Faculty of Mechanical Engineering and Naval Architecture , 2002. 579-584 p.
Keyword [en]
product modelling, conceptual design, design support
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-22613Local ID: 1893ISBN: 953-6313-46-4 (print)OAI: oai:DiVA.org:liu-22613DiVA: diva2:242926
Conference
International Design Conference - Design 2002, Dubrovnik, May 13-17, 2002
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2013-11-13
In thesis
1. Constraint-based conceptual design using principle solution elements
Open this publication in new window or tab >>Constraint-based conceptual design using principle solution elements
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The design of new products is an important engineering activity, and much of the competitiveness in high-salary countries depends on the ability to develop innovative products with acceptable time to market.

During conceptual design, the principle solution for a product is conceived. This early phase of a systematic design process is of great importance for the later success of products. Available design support tools are mainly oriented towards the later phase of embodiment design (e.g. volume modellers), and they do not effectively support conceptual design. This work presents an information model, methods, and a tool for computer-supported conceptual design.

During conceptual design, creative steps and the modelling of function structures, hierarchies, solution principles and concepts must be supported in order to reduce the considerable time needed by systematic design methods.

Literature as well as existing research prototypes have been analysed to determine the state of the art in research regarding computer-supported conceptual design. Design projects of master's degree engineering students, previously carried-out at the division, have been studied in order to gain insight into the needs and possibilities of supporting concept generation for various design tasks.

The work has resulted in a parametric, feature-based information model that is able to describe concepts as choices of principle solution elements and their quantification by value assignments. The model operates on a higher semantic level than for example document or model files by applying a constraint network that connects parameters of requirements, function structure, F/M tree, solution principles and concepts. The model has been tailored towards easy exchangeability of principle solution elements by a division into different constraint types, of which internal constraints are directly reusable. Using the model, the co-evolution of concept synthesisand early calculations is facilitated.

The presented information model has been implemented in a prototype of an interactive tool for computer-supported conceptual design. The tool includes a graphical user interface for work with views for function structures and F/M trees. Reuse is enabled by storing and re-inserting principle solution elements from a database.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, Department of Mechanical Engineering, 2005. 197 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 930
Keyword
Conceptual design, functional modelling, constraint-based design, design reuse, VDI 2222, product modelling, design support
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-24463 (URN)6576 (Local ID)91-85297-59-3 (ISBN)6576 (Archive number)6576 (OAI)
Public defence
2005-04-22, C3, Hus C, Campus Valla, Linköping, 10:15 (Swedish)
Opponent
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2012-11-30
2. Reuse of principle solution elements in conceptual design: an information model for concepts in systematic design
Open this publication in new window or tab >>Reuse of principle solution elements in conceptual design: an information model for concepts in systematic design
2003 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Product development is an important activity in engineering design, and much of the competitiveness in high-salary countries depends on the ability to develop innovative products with acceptable time to market.

The early phase of a systematic design process, namely conceptual design, during which the principle solution for a product is conceived, is of high importance for the later success of products. Available design support tools are mainly oriented towards embodiment design (e.g. volume modellers), and they are not effectively supporting conceptual design.

During conceptual design, creative steps and the modelling of function structures, principle solutions and concepts must be supported in order to reduce the high time need of systematic design methods.

Literature as well as existing research prototypes have been analysed to determine the state of the art in research regarding computer supported conceptual design. Design projects of master's degree engineering students, previously carried-out at the division, have been studied in order to gain insight into the needs and possibilities of supporting concept generation for various design tasks.

The work has resulted in a parametric information model that is able to describe concepts as choices of principle solution elements and their quantification by value choices. The model is operating on higher semantic level than e.g. document or model files by applying a constraint network that connects parameters of requirements, function structure, principle solutions and concepts. The model has been tailored towards easy exchangeability of principle solution elements by a division into different constraint types, of which internal constraints directly are reusable. The presented information model has been partly verified in a prototype implementation.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2003. 96 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1044
Series
LiU-TEK-LIC, 43
Keyword
conceptual design, functional modelling, constraint-based design, design reuse, VDI 2222, product modelling, design support
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-22609 (URN)1889 (Local ID)91-7373-746-1 (ISBN)1889 (Archive number)1889 (OAI)
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2013-11-13

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Wilhelms, Sören

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