Research on Common Mode Failure Analysis Method for Civil Airplane

Common mode failure(CMF) is dependent failure event,which increases joint failure probability of complex systems and reduces the reliability of redundant systems so that CMF causes huge security risks to the systems.According to the basic concept of CMF,the causes of CMF are analyzed and the qualitative analysis process is given for the CMF.Based on extend fault tree and Markov analysis,the probability calculation methods of CMF are put forward.