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.
关键词
故障树分析/不确定性/系统可靠性/重要性测度
Key words
fault tree analysis(FTA)/uncertainty/system reliability/importance measure
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