故障树方法在传感器子系统可靠性分析中的应用

The Appfication of Fault Tree Method for Sensors Subsystem＇s Reliability Analyze

飞行控制系统是飞机的重要组成部分，其先进程度已成为飞机性能和作战效能的关键因素，因此有必要对其可靠性进行深入研究。飞行控制系统的可靠性主要由感知对象状态的传感器子系统、实施数据处理和执行控制功能的飞控计算机子系统、操纵舵面运动的伺服作动子系统决定。文章针对飞控系统的传感器子系统的特点，引入了故障树分析方法，对传感器子系统建立了故障树模型，采用定性分析与定量计算得出该子系统的故障模式、可靠度、关键重要度，为可靠性设计和故障诊断提供了依据。结果表明，故障树分析法是对传感器子系统进行可靠性分析的一种有效方法。

The Fly Control System is an important part of an aeroplane. It is admitted that the fly control system design is the kernel station in the aeroplane design, and its＂ design level is the key factor for the performance of an aeroplane. So it is important to study the fly control system＇s reliability for the performance and safety of the aeroplane. Fly control system＇s reliability deceided by sensors subsystem, flight con- trol computer subsystem, servo actuation subsystem. According to the characteristic of the sensors subsystem, introduces Fault Tree Analysis method. Then set up fault tree model for sensors subsystem and make reliability anlysis for it. The result shows that Fault Tree Analysis is a good method to appraise sensor system＇s reliability.