Research And Implementation Of Scheme Design Based On Extension Knowledge Integration

Conceptual design is a most important, complex, active and creative design state in the process of products design. It also is a most determinative process of which product forms its value. Research on concept design is always an advanced subject of Computer Integrated Manufacture System (CIMS). Supported by National Science Foundation of China (50175103) and National High-Tech Research and Development Program of China ("863")(2002AA411110), conceptual design based on extension theory is studied in the paper, and it has significant theory and engineering value for solving the bottleneck of intelligent conceptual design.The main contribution of the paper is summarized as follows:(1). Current conceptual design development all over the world is summarized deeply in the paper. It divides conceptual design systems into commercialized and experimental conceptual design system, and it also analyses existing problems and tendency of conceptual design.(2). Extension engineering method is analyzed in the conceptual design of the mechanical product. Fuzzy matter-element, extension case reasoning and extension evolution design method are integrated. Scheme design system frame, module and relative critical technology based on extension knowledge integration is put forward and its system also is developed.(3). Based on KBE intelligent design, UG product modeling and knowledge fusion technology, Knowledge-Driven cooperative layout method is raised. Furthermore, it is verified in the mechanical part modeling, the model of mechanical transmission scheme layout. The integration between concept design and detail design is implemented in some extent.(4). To the problem which is met in the data structure and interface realization in the course of developing of this system, the interface realization technology based on VC MFC and Manuscript API is proposed in the paper with secondary development technology of UG. It can effectively solve the problem that multi-interface functions of DLL file used VC MFC under UG software presently. So it can provide a new development way for UG user.