故障树分析在某APU进气门故障诊断中的应用

首先介绍了故障树分析方法的概念和原理，然后以某辅助动力装置（APU）进气门组件为例．在对系统故障现象进行分析判断的基础上，按照任务和功能关系，建立包含各功能单元的故障树模型。随后求得系统的最小割集，并计算出底事件的重要度，并以此为依据，从大到小排序，确定故障诊断的最优程序。实验结果表明，所用方法具有较强的故障诊断能力，能进行准确的故障定位，并能给出相应的故障处理措施，为该辅助动力装置故障诊断的发展提供了较为实用的参考价值。

Application of Fault Tree Analysis for Fault Diagnosis in Inlet Door of a APU

This paper summarizes the principle and concept of fault tree analysis method, then taking the inlet door module of a auxiliary power unit （ APU ） for example. According to the mission and function of the system, this method constructs a fault tree model which includes each involved unit based on the analysis and estimation about the system fail- ure. Then it gets the minimal cut sets of the system and the importance of each end incident. According to this, the meth- od can prioritize these units and find the best program to remove the faults. Experiments results show that the method has a betterability of fault diagnosis, it can make a exact faul torientation and offer a relative disposal measure of the fault,it has a positive effect on the development of fault diagnosing for the auxiliary power system.