基于领域本体复杂产品设计知识检索技术.pdfVIP

17 2 计算机集成制造系统 Vol. 17 No.2 2 0 1 1 2 Computer Integrated Manufacturing Systems Feb. 20 1 1 : 100 - 5911( 2011) 02- 0225- 07 + , , ( , 100191) : , ! , , , , , , , : ; ; ; ; :TH 122; TP391 : A Design knowledge retrieval technology based on domain ontology for complex products + YUXu, L I U Jihong , H E M iao ( School of Mechanical Engineering Automation, Beihang University , Beijing 100191, China) Abstract: To solve t he problem that knowledge couldnt be discovered and reused easily in product data management system, a design knowledge retrieval technology based on domain ontology was proposed. A domain ontologyin dex know ledgedata resource! threelayer mapping structure w as put forward to represent design knowledge. The design know ledge system w as formed consisting of domain ontology as semantic model and index knowledge as searching index . A new knowledge retrieval met hod based on semantics w as put forward. Design problem w as ana lyzed based on semantics and t ransformed into ontology concepts. To match know ledge which satisfied designers search intentions, a text sim ilarity computation based on vector space model w hich int roduced relation w eight to those ontology concepts and domain w eight to w ords of knowledge t ext w as proposed. Finally , an example of cruise missiles overall design w as provided to reveal the feasibility of retrieval technology . Key words: product design; domain ontology ; know ledge representation; know ledge retrieval; cruise missile PDM ( 0