Model-based Rapid Redesign Using Decomposition Patterns

[+] Author and Article Information
Li Chen1

Systems Department, United Technologies Research Center, 411 Silver Lane, MS 129-85, East Hartford, CT 06108chenl2@utrc.utc.com

Ashish Macwan

Mechanical & Industrial Engineering Department, University of Toronto, Toronto, Canada

Simon Li

Department of Mechanical Engineering, University of New Brunswick, New Brunswick, Canada


Corresponding author.

J. Mech. Des 129(3), 283-294 (Mar 12, 2006) (12 pages) doi:10.1115/1.2406099 History: Received March 10, 2005; Revised March 12, 2006

This paper presents a pattern-based decomposition methodology for rapid redesign to support design customization in agile manufacturing of evolutionary products. The methodology has three functional phases. The first phase, called design dependency analysis, systematizes and reorganizes the intrinsic coupling structure of a given existing design model that is represented using the design dependency matrix. The second phase, called redesign partitioning analysis, generates alternative redesign pattern solutions to form a solution selection space through a three-stage procedure. The third phase, called pattern selection analysis, finds an optimal redesign pattern solution that entails the least potential redesign effort (in the subsequent solution process). Each pattern solution identifies and delimits the portions of the design model that need to be recomputed, thus expediting the redesign solution process. In such a way, one can treat the recomputation of the entire model, which is a conventional and computation-expensive solution approach, only as the last resort to solve the redesign problem given. An example redesign problem is used for the methodology illustration.

Copyright © 2007 by American Society of Mechanical Engineers
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Figure 1

Decomposition of a redesign problem represented by a DDM

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Figure 2

Example redesign pattern solution for a redesign scenario

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Figure 3

Library of redesign decomposition patterns

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Figure 4

Workflow of the pattern-based decomposition methodology for redesign

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Figure 5

DDM of the relief valve example problem

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Figure 9

Illustration of the viable regions when multiple bounded regions are present

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Figure 10

Result after applying diagonal matrix analysis (stage 1)

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Figure 6

Partition point and decomposition pattern

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Figure 7

Example diagonal matrix indicating a group of 1 elements

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Figure 8

Generalization of a group, its four boundary lines, and the resulting nine regions

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Figure 11

Final pattern search space for the relief valve example

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Figure 12

Plot of potential redesign effort indices with different weights




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