| Fuzzy Petri net has a good knowledge representation, logical reasoning and dynamic description of the functional capacity of a causal relationship, with its parallel processing matrix computation and strong fault tolerance. Fuzzy Petri net is widely used in the fuzzy knowledge representation and reasoning aspects recently,one of the key issues in Expert system is knowledge representation and reasoning, and the research about Fuzzy Petri nets combined with expert system is still at an initial stage.In this paper, the research about the Fuzzy Petri net introduced into expert system as a tool for knowledge representation and reasoning is attempted. Based on the theory of fuzzy Petri net, the detailed production of fuzzy rules and fuzzy Petri net mapping relations and the conversion common algorithms are given. the main reasoning algorithm on the fuzzy Petri net is discussed, and the matrix operations as a formal reasoning algorithm for expert system reasoning is used.In this paper, as topics of the fuzzy expert system theory and methods, the knowledge representation, reasoning mechanisms and the determination of membership function are discussed, Object-oriented thinking has been applied to the system analysis , design and implementation, The system framework of the composition and the collaboration operating mechanism in the interactive module are discribed, This paper discussed the problems in the fuzzy Petri net automatic modeling and simulating visualization , and proposed solutions and the specific methods based on grid visualization technology. Design Pattern is introduced into the design visualization module implementation.Finally, through the tire loader gearbox fault diagnosis example, the expert system based on Fuzzy Petri Net is verified, and has a good meaning and application of theoretical research prospects. |
