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Technical Briefs

Toward Effective Mechanical Design Reuse: CAD Model Retrieval Based on General and Partial Shapes

[+] Author and Article Information
Min Li

Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singaporelimin@nus.edu.sg

Y. F. Zhang

Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singaporempezyf@nus.edu.sg

J. Y. H. Fuh1

Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singaporempefuhyh@nus.edu.sg

Z. M. Qiu

Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singaporezhiming.qiu@sap.com

1

Corresponding author.

J. Mech. Des 131(12), 124501 (Nov 03, 2009) (8 pages) doi:10.1115/1.4000253 History: Received January 01, 2009; Revised August 13, 2009; Published November 03, 2009; Online November 03, 2009

In product design, a large proportion of three-dimensional (3D) computer-aided design (CAD) models can be reused to facilitate future product development due to their similarities in function and shape. This paper presents a novel method that incorporates modeling knowledge into CAD model similarity assessment to improve the effectiveness of reuse-oriented retrieval. First, knowledge extraction is performed on archived feature-based CAD models to construct feature dependency directed acyclic graph (FDAG). Second, based on the FDAG subgraph decomposition, two useful component partitioning approaches are developed to extract simplified essential shapes and meaningful subparts from CAD models. Third, the extracted shapes and their FDAG subgraphs are indexed. Finally, the indexed shapes that are similar to user-sketched queries are retrieved to reuse, and FDAG information of the retrieved shapes is provided as redesign suggestions. Experimental results suggest that the incorporation of modeling knowledge greatly facilitates CAD model retrieval and reuse. Algorithm evaluations also show the presented method outperforms other 3D retrieval methods.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Flow chart of the proposed reuse-oriented retrieval method

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Figure 2

(a) The ANC-101 part; (b) the FDAG of ANC-101; (c) and (d) design histories of ANC-101

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Figure 3

(a) A bracket part; (b) a feature dependency directed acyclic graph representation of the bracket and the multilevel simplifications based the FDAG

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Figure 4

Subparts of the bracket and the corresponding FDAG subgraphs

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Figure 5

General shape queries and retrievals using the general shape matching algorithm

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Figure 6

Reuse-oriented retrieval by the general shape matching algorithm

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Figure 7

Manually classified categories of the CAD model data set

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Figure 8

(a) A query model; (b) and (c) Top retrievals by general shape matching and SD methods respectively; (d) The comparison of precision-recall curves (GSM: solid and SD: dashed)

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Figure 9

Average precision-recall curves of the general shape matching and SD algorithms

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Figure 10

(a) Meaningful subparts extracted (highlighted in lighter color); (b) subpart queries and retrievals (highlighted in lighter color) by the partial shape matching algorithm

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Figure 11

Expertise-preserving reuse of a pin subpart by the partial shape matching

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