Fault diagnosis model of aircraft avionics system board

According to the aircraft maintenance status, a new method is given to diagnosis the fault component in aircraft avionics system board. TCAS data processor board is taken as a example. By analyzing the relationship between fault sources and fault phenomenon and using data fusion technology, the bottom positioning of the fault components are realized. Combing the practical fault data from airlines with the components characteristics, the fault possibility of the components can be concluded. In this way, a possibility rank can be generated After that, the upper fault positioning is used to make sure of the fault components by fault reasoning and to test components status in possible fault components list.