鲁棒故障检测和诊断方法在飞控系统中的应用

The Application of Fault Detection and Diagnosis Method to Flight Control System

针对全状态可测存在输入不确定性和故障的非线性系统,提出了一种鲁棒故障检测和诊断的方法。为使故障检测残差对故障敏感而对干扰不敏感,将残差生成问题转化为一个多目标优化问题,在干扰等不确定性到残差信号的传递函数最大奇异值为0的条件下,最大化故障到残差信号的传递函数最小值的奇异值,使残差对故障敏感而对不确定性不敏感。最后,以某飞机左升降舵和方向舵损伤故障为例,验证了该方法的有效性及快速性。

A robust fault detection and diagnosis method for nonlinear systems with full state information is introduced. A multi -objective fault detection criterion is proposed to be solved by maximizing the smallest singular value of the transformation from faults to fault detection residuals while decoupling or minimizing the largest singular value of the transformation from disturbance to the fault detection residuals. This method is applied to an aircraft and the case study is introduced by the damage fault of aircraft left elevator and rudder. The simulation results show the rapidity and high efficiency.