特种车辆柴油发动机故障诊断专家系统推理机设计

针对特种车辆柴油发动机故障诊断专家系统知识表示的模糊特性，建立了故障类型的模糊诊断模型，提出了不精确推理方法和模糊匹配策略，采用柴油发动机故障类型诊断的反向推理和故障原因分析及故障消除措施正向推理相结合的混合推理机制，设计了总体目标推理和级目标推理相结合的推理机．系统现场运行的快速推理结果表明了该推理机设计是成功的．

Design of the Inference Engine of the Fault Diagnosis Expert Systems for Diesel Engine in Special Type Vehicles

In view of the fuzzy characteristic of the knowledge representation of the fault diagnosis expert systems for the diesel engine in special type vehicles, the fuzzy diagnosis models of fault type were established, and an uncertainty reasoning method and fuzzy matching strategy were put forward. The inference engine, in which eoUective goal reasoning and grade goal reasoning were coupled, were designed based on the hybrid reasoning mechanism of the backward reasoning of the fault type diagnosis and the forward reasoning of the factors giving rise to fault and its eliminating measures. The results that effective inference of fault diagnosis expert systems for the diesel engine in special type vehicles was realized revealed that the design of the inference engine was successful.