Design and Realization of Fault Diagnosis System Based on FTA and Expert System

For resolving equipment complex fault searching problems, designed a dialogue mode search method and realized the fault diagnosis and search system, based on the combining of FTA (fault tree analysis) and expert system. The diagnosis and search method's key idea is to transform the expert diagnosis knowledge into the fault tree form, which not only visually reflect the logic relation between the fault and causes, but also improve the diagnosis system modularization level. The fault diagnosis and search method is mainly based on dialogue mode and first searching the fault node which key importance degree high, fault probability large and search cost small, so the method is more reasonable and the search speed is more quickly than the usual method. By changing the knowledge base type, the method also can be used to more search system.