A Transparent Design System for Iterative Product Development

[+] Author and Article Information
Staffan Sunnersjö, Mikael Cederfeldt, Fredrik Elgh

Department of Mechanical Engineering, School of Engineering, Jönköping University, Box 1026, SE-551 11 Jönköping, Sweden

Ingvar Rask

Division for Product Development, IVF Industrial Research and Development Corporation, Argongatan 30, SE-431 53 Mölndal, Sweden

J. Comput. Inf. Sci. Eng 6(3), 300-307 (Jan 09, 2006) (8 pages) doi:10.1115/1.2218363 History: Received June 21, 2004; Revised January 09, 2006

Automated systems for variant design can be used for design iterations in order to guide the designer towards solutions that are optimized with respect to weight, cost, lead time, or other vital properties. In this work such a system for computational design problems is presented together with examples of its application. The system performs design computations, computed aided design model configuration, production process planning, and cost estimation. The design rules and algorithms are captured in knowledge “chunks,” which are human readable as well as computer executable. The workflow governing the execution of these rules and algorithms is created using a dependency structure matrix (DSM) which is included in the system. Particular attention has been given to the need for transparency, modularity, and longevity of the system, which is a prerequisite for such a system to become a viable tool in industrial applications. Experiences from the proposed system indicate that the DSM workflow manager in combination with a human readable and modularized knowledge base provides clarity and transparency for both developer and user of the system.

Copyright © 2006 by American Society of Mechanical Engineers
Topics: Design , Transparency
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Figure 5

Instances of the four class models

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Figure 1

Architecture of the CoRRP system

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Figure 2

Submarine escape section (left) with the studied bulkhead (simplified) together with examples of stiffening members (right)

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Figure 6

Generic cost structure developed for implementation in an automated system

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Figure 7

Overall view of modules in the CoRPP system. Executable design manual (bottom left), DSM workflow manager (top left), CAD model (bottom center), user interface (center) and cost information models (right). At run time only the user interface and the DSM workflow manager are displayed while results in MATHCAD , PRO/E , and EXCEL are displayed on request.

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Figure 8

Pareto-optimal combinations of weight and cost for variations of number of stiffeners and plate thickness that all fulfill customer specifications and manufacturing constraints. The span due to uncertainties of the cost estimation is indicated.

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Figure 3

Design matrix for bulkhead design problem

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Figure 4

The three modeling methods




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