Design of Avionic Fault Diagnosis Expert System Based on 1553B Bus
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Faults of avionic system have features of multiformity and complexity.The fault diagnosis methods and fault causation of avionic system were analyzed,and fault diagnosis database was set up based on experience of filed experts,technologists and sophisticated maintainers.Fault diagnosis expert system based on MIL-STD-1553B was established,on-line fault detection and offline fault diagnosis of the avionic system were realized.In addition to BIT and ATE diagnosis methods,a kind of available diagnosis method that has higher effectiveness of fault diagnosis was put forward.The expert system made use of integrated reasoning modes based on case reasoning,rule reasoning,fuzzy reasoning and PHM,and rapid fault location and fault prediction were performed.The proposal of condition-based maintenance was brought forward.This method improves fault detection rate and fault diagnosis efficiency.