Fault Diagnosis Expert System for Launch Vehicle Based on Augmented Fault Tree

In view of the difficulty of knowledge acquisition,a fault diagnosis expert system for launch vehicle combined with the augmented fault tree analysis is established in the paper.On the part of diagnosis knowledge,the automatic knowledge acquisition and normative representation method for launch vehicle is presented based on the augmented fault tree analysis,which solved the problem of knowledge acquisition for expert system based on rules.Furthermore,the inference engine of the fault diagnosis expert system for launch vehicle is given also.It can priorly diagnose the faults with the high occurrence probability,structure importance and hazardness based on the diagnosis priority.In addition,the accuracy and strictness of reference process can be ensured by the combining the superficial reference and deep reference.