Abstract:

In order to study and evaluate the cause of aviation battery fault,the fuzzy theory is used to establish the set of fault symptom factors and the set of fault cause evaluation through the analytic hierarchy process.The fault symptom vector is determined.The primary level fuzzy evaluation matrix and the secondary level fuzzy evaluation matrix are defined.The consistency of the matrix is checked by the nine-scale matrix table of fault factors.The primary and secondary factor weights of the fault factor concentration are established.The feasibility and effectiveness of the fuzzy evaluation model are verified by investigating the fault causes in order according to the size of the membership degree.Finally,the order of occurrence probability of fault causes is obtained.

Key words: fuzzy theory, aviation battery, analytic hierarchy process, fault factor, fault evaluation