Product Manufacturability Analysis In Applied Research, The Expert System

In recent years, the technology of expert system is already broadly used in industry, agriculture, military, medical science and national economies with each aspect of society life.It is applied to product manufacturability analysis in manufacturing industry and guiding the product designs, and it will have remarkable effect on improving product quality, reducing lead-time and cost of product.The technology of expert system applied to product manufacturability analysis is researched in this paper. The general construction and the characteristics of the expert system, some knowledge representation methods and inference technique are discussed. The paper introduces the strategy, the dimensions and the methods of product manufacturability analysis. This dissertation gives a product manufacturability analysis prototype system with feature-based method, it also puts forward some new methods concerned on system construction, knowledge representation and inference engine.Knowledge representation and organization is one of the key technique of expert system in the buildup. With the mechanical parts for a characteristic, a kind of mixed knowledge representation method which can represent product manufacturability analysis is developed after studying the composing, the classification and the characteristics of product manufacturability knowledge, joining together parts feature representation with the representation method of knowledge to improve the efficiency of inference engine. Based on relational data base technique,the knowledgy base is organized. In the aspects of inference research, the inference engine is designed adopting to forward-reasoning and classf ication method. The inference engine can obtain the information from product molding file instead of inputting much of data or answering many questions so as to simplify the operation of the user very much. During the process of inference, the knowledge base is classified by the keywords to improve the system efficiency.Base on the above researches, a feature and knowledge-based prototype system of product manufacturability analysis is developed, used for proceeding the analysis to the design model of the product and guiding and quickening product design process.