The Expert System Of Drum Brake For AUTO

With the market competition becoming more and more intense nowadays, enterprises will be closed down if they couldn't develop new products to adapt the changing market. In order to improve the products quality, reduce developing time, save production costs and enhance the enterprise competition strength, a very important step is to improve the design means. Advanced design means must take advanced design ideas as precondition. Taking the KBE (knowledge based engineering) to study the problem of brake design plays great roles in promoting developing other correlative vehicle components. This thesis studied the theory of KBE and ES, summarized many experiences and rules on brake design, applied its to the system develop, analyzed the law that the main dimension parameters of brake affect the performance of brake, and put forward some formulas to predict the performance of brake. This thesis also deeply studied knowledge expression method, the mode of establishing knowledge base, the realization method of inference mechanism under 0-0 environment. Combining with the real production fact, the thesis provided an effective design example using CAD/CAE means. On the basis, utilizing Visual Basic programming language, a knowledge based Brake Design Expert System (BDES) was developed primarily. It can be known that using PR(product rule) method combining with FS(frame structure) method can make knowledge expression more convenient and practical. Using the "loose & tight coupling " style not only maked for the refresh, expand and administration of knowledges but also can improve the efficiency of system inference. Aiming at different inference phases and problems, combining RBR(rule_based reasoning) with FM(fuzzy matrix) reasoning by using different inference mechanism is easy to realize solve strategy of the fuzzy inference mechanism. Using AI(artificial intelligence) technology with CAD/CAE means is a feasible way for KBE design method. Proved by the design example, BDES can solve the actual problems of produce and design well and reduce the procucts developing time and design cost greatly.