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TECHNICAL PAPERS

Modeling of Evolutionary Design Database

[+] Author and Article Information
D. Xue

Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, Alberta, Canada T2N 1N4dxue@ucalgary.ca

H. Yang, Y. L. Tu

Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, Alberta, Canada T2N 1N4

J. Comput. Inf. Sci. Eng 6(1), 22-32 (Sep 22, 2005) (11 pages) doi:10.1115/1.2164452 History: Received June 03, 2005; Revised September 22, 2005

This research introduces an evolutionary design database model to describe design requirements and design results developed at different design stages from conceptual design to detailed design. In this model, the evolutionary design database is represented by a sequence of worlds corresponding to the design descriptions at different design stages. The design requirements and design results in each world are modeled using a database representation scheme that integrates both geometric descriptions and nongeometric descriptions. In each world, only the differences with its ancestor world are recorded. When the design descriptions in one world are changed, these changes are then propagated to its descendant worlds automatically. Consistency of the design descriptions in descendant worlds is also checked when design descriptions in an ancestor world are changed. A case study is conducted to show the effectiveness of this evolutionary design database model.

Copyright © 2006 by American Society of Mechanical Engineers
Topics: Design , Databases , Modeling
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Figures

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Figure 1

Three levels of design database descriptions

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Figure 2

Design requirement and design result

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Figure 3

An evolutionary design database modeled by worlds

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Five types of world operations

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Figure 5

Virtual and true design descriptions

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Figure 6

Design database modeling by design description operations

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Figure 7

Evolution of design requirements

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An AND-OR tree and its alternative AND trees

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Figure 9

Evolution of design results

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Figure 10

Consistency of entities

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Consistency of behaviors

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A state-transition behavior

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Figure 13

Changes of logic relationships by changing facts

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Figure 14

Changes of logic relationships by changing rules

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Figure 15

A snapshot of the implemented system

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Figure 16

An evolutionary design database modeled by multiple worlds

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