伺服作动子系统的两种可靠性分析方法

Two Reliability Analysis Methods for Servo Actuation Subsystem

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伺服作动子系统的特点,引入了故障树分析和马尔可夫过程两种方法分别对传感器子系统建立了模型,通过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,这两种方法都是对伺服作动子系统进行可靠性分析的有效方法。

The Fly Control System is an important part of an aero plane.It is admitted that the fly control system design is the kernel station in the aero plane design,and its＇ design level is the key factor for the performance of an aero plane.So it is important to study the fly control system＇s reliability for the performance and safety of the aero plane.Fly control system＇s reliability decided by sensors subsystem,flight control computer subsystem,servo actuation subsystem.According to the characteristic of the servo actuation subsystem,introduces Fault Tree Analysis method and Markova process to set up models separately for reliability analysis.The result shows that Both Fault Tree Analysis and Markova process are good method for sensor system＇s reliability analysis.