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TECHNICAL PAPERS

An Adaptive Machining Fixture Design System for Automatically Dealing With Design Changes

[+] Author and Article Information
Mervyn Fathianathan1

Systems Realization Laboratory, G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 210 Technology Circle, Savannah, GA 31407

A. Senthil Kumar, A. Y. C. Nee

Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260

1

Corresponding author.

J. Comput. Inf. Sci. Eng 7(3), 259-268 (Apr 02, 2007) (10 pages) doi:10.1115/1.2752816 History: Received November 06, 2006; Revised April 02, 2007

Integrated product and process design involves a dynamic environment where various design changes are made when the requirements of the different domains are not sufficiently met. Dealing with changes is a tedious and cumbersome process. To deal with design changes automatically, this paper presents the development of an adaptive fixture design system based on an evolutionary search algorithm. The system senses a change made to the workpiece model and automatically deals with the change. Conducted experiments reveal that the evolutionary search algorithm is efficient and effective in dealing with design changes adaptively.

Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Change in locator position due to workpiece change

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Figure 2

Population-based search algorithms versus gradient-based search algorithm

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Adaptive fixture design architecture

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Figure 4

Fixture design solution representation

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Figure 5

Example of a fixture design solution representation

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Functional crossover

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Face-level crossover

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Initial solution

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Figure 9

Experiments to evaluate ability of evolutionary search algorithm in dealing with design changes

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Figure 10

Results of experiment 1

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Results of experiment 2

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Modified fixture design for example 2

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Initial fixture design for example 2

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Figure 13

Design change for example 2

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Results of experiment 3

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