Fault tree importance measure analysis method and its application considering uncertainty
In order to measure the impact of uncertainty in the probability of bottom event occurrence on the top event,a fault tree importance analysis method considering the uncertainty of bottom event occurrence probability is proposed based on the moment independent importance measure,based on the establishment of a fault tree probability composition function.Taking an aircraft icing detection system as an example,the importance method proposed was used to analyze the impact of uncertainty in the probability of bottom event occurrence on the system's failure.Designers can conduct more targeted analysis and design based on the importance results,and also verify the rationality of the proposed method.
fault tree analysis(FTA)uncertaintysystem reliabilityimportance measure
万方数据
维普
