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Extended support of conceptual design using operating states and dimensioning cases
Linköping University, Department of Mechanical Engineering, Machine Design. Linköping University, The Institute of Technology.
Linköping University, Department of Mechanical Engineering, Machine Design. Linköping University, The Institute of Technology.
2004 (English)In: Proceedings of NordDesign 2004 conference / [ed] Lehtonen, T; Pulkkinen, A; Riitahuhta, A, Tempere, Finland: Tempere University of Technology Product Development Laboratory , 2004, 21-30 p.Conference paper, Published paper (Refereed)
Abstract [en]

This article focuses on conceptual design. In this phase, systematic design provides models for function analysis and concept synthesis. Little support exists though for early consideration of different operating states and dimensioning cases while concepts arc developed. This is important in order to comprehend the relation between product requirements and design characteristics in different or changing environments or use cases. This article suggests modelling each operating state and each dimensioning case using a dedicated object and describing conceptual design using a constraint network in order to explicitly capture the inter-element relations. The purpose is to facilitate early quantitative reasoning (e.g. to check if a requirement is fulfilled in a specific dimensioning case with specific chosen means and values), to simplify the change of views (e.g. analysing another operating state) and to flexibly support change operations on the designed product (e.g. changing a solution principle or a value choice in a concept).

Place, publisher, year, edition, pages
Tempere, Finland: Tempere University of Technology Product Development Laboratory , 2004. 21-30 p.
Keyword [en]
Conceptual design, design support, design concept. operating states, dimensioning
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-24083Local ID: 3647ISBN: 952-15-1227-X (print)OAI: oai:DiVA.org:liu-24083DiVA: diva2:244400
Conference
NordDesign 2004 - Product Design in Changing Environment, Tempere, Finland, 18-20 August, 2004
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2012-11-30
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

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Wilhelms, SörenJohansson, Per

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