基于扰动估计的飞行控制系统传感器故障重构

针对飞行控制系统的传感器故障重构问题,讨论了基于扰动估计的传感器故障检测与重构方法。首先,通过建立观测器,对已有系统的干扰进行估计;其次,通过干扰的估计值来建立系统的鲁棒观测器;最后,再通过对系统建立多个降维鲁棒观测器来隔离并重构传感器故障。采用某飞机横侧向模型进行仿真验证,仿真表明基于扰动估计的鲁棒观测器能够有效地对传感器故障进行隔离与重构。

Sensor Fault Reconfiguration Based on Disturbance Estimation in Flight Control System

To solve the problems of sensor fault reconfiguration in flight control system,a method based on disturbance estimation is discussed.First,the disturbance of the existing systems is estimated by establishing observers.Then,a kind of robust observer can be constructed on the estimation of the disturbance.Finally,a set of reduced order robust observers are set up for sensor fault isolation and reconfiguration.To demonstrate the validation of the given method,a simulation based on a lateral plane model is made.It can be drawn from the simulation result that the robust observers can isolate sensor faults and reconfigure the signals effectively.