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Research Papers

Semantic Applications Enabling Reasoning in Product Assembly Ontologies—Moving Past Modeling

[+] Author and Article Information
Lijuan Zhu, Uma Jayaram, OkJoon Kim

 VRCIM Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164zhuliice@wsu.edu

J. Comput. Inf. Sci. Eng 12(1), 011009 (Dec 22, 2011) (17 pages) doi:10.1115/1.3647878 History: Received May 07, 2010; Accepted July 11, 2011; Published December 22, 2011; Online December 22, 2011

In this paper, the authors postulate an approach to introduce reasoning capabilities into ontologies in the product assembly domain in order to truly exploit these logic-based and formal representations for product data. A model containing semantic applications with multiple reasoning units in logic reasoning layer of a layered semantic application architecture is proposed. Retrieval specifications and inference rules in SWRL/SQWRL are defined in these reasoning units. Besides, local-based user interfaces have been developed to allow product engineers to submit reasoning tasks and view querying retrievals or inference results. The approach and semantic applications are illustrated with two case studies in the product assembly domain. It is demonstrated that this approach not only enables existing product data to be queried and retrieved but also enables new product data, which is not explicitly expressed in the ontology models, to be derived. It is concluded that the reasoning mechanism exploits and extends the semantic representation made possible through the ontology and thus holds promise for improved knowledge discovery and understanding.

Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Relation definitions of two components in a CAD ontology coded in OWL DL

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Figure 2

Semantic application architecture

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User interface designed for semantic applications

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Figure 4

Overall sequence of reasoning for assembly and component levels

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Multiple views of component hierarchy in semantic application

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A simple assembly model and constraint details in PRO/E

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Multiple views of constraint information in semantic application

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Figure 8

SWRL/SQWRL rule infers relation between constraints and components

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Figure 9

A simple assembly sequence starting from PART_C

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Construction of assembly sequence by inferences of SWRL rule

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Iteration process for inferring assembly sequence

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Internal relationships among PART_A, PART_B, and PART_C

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Two components (PART_B and PART_C) in PRO/E

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Example assembly: Hubble telescope

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Main user interface of semantic application for assembly level

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Figure 16

Composition tree constructed for Hubble telescope assembly

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Figure 17

Query and inference results about design context of lens truss

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Figure 18

Example of an assembly sequence for optical system of Hubble telescope

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Figure 19

Ontology-driven user interface of semantic application for component level

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