某燃油控制装置的动态故障树分析

A Dynamic Fault Tree Analysis of Fuel Control Unit

具有多裕度机构某燃油控制装置曾发生过空中停车故障,该机构较为复杂,文章利用动态故障方法分析了发动机空中停车发生的概率,该方法利用各个底事件的函数分布,求出不同底事件发生概率,进而求出顶事件发生的概率。该方法描述了故障发生的动态特性,适用于具有相关性的多备份的复杂冗余系统,能有效避免静态故障树的繁杂计算。

A fuel control device with a multi - margin mechanism has had an air stop failure, that mechanism is complex. In this paper, the dynamic fault method is used to analyze of Probability of engine in - flight shutdown. The method uses the function distribution of each bottom event to calculate the occurrence probability of different bottom events. And then the probability of the occurrence of the top event is calculated. This method describes the dynamic characteristics of fault occurrence. The method is suitable for complex redundant systems with correlated multiple backups and can effectively avoid complex calculation of static fault trees.