The design of heavy machine´s fault diagnosis prototype system based on mixed expert system

Beginning with the simple introduction of method and current situation about heavy machine and its fault diagnosis, this paper puts forward the method of fault diagnosis based on mixed expert system, which uses the rules and cases. The architecture and diagnosis flow of the system are both constructed. Then the knowledge base of heavy machine´s fault diagnosis and inference engine are mainly set up, including the rule base and case base which are respectively grounded on the “Structure Fault Tree” and breakdown maintenance record. Finally, the prototype system is designed.