基于鲁棒自适应观测器的飞控系统传感器故障隔离与重构

Robust Adaptive Observers-Based Sensor Fault Isolation and Reconfiguration in Flight Control System

考虑到飞行控制系统闭环反馈及实时的特性,设计了多个鲁棒自适应观测器用于传感器的故障隔离与重构.这样有效的抑制了噪声和模型不确定性,以及闭环传感器输出之间的相互影响.同时对残差进行时序概率比检验,避免了故障误报和漏报.应用某型战斗机地形跟随控制系统进行仿真验证,在保证闭环反馈系统稳定的前提下,实现了传感器的在线故障隔离与重构,达到了预期的效果.

Based on performance of real-time and closed loop feedback flight control system, a set of robust adaptive observers are set up for sensor fault isolation and reconfiguration. By the method, model uncertainties, noises and interaction of sensor outputs are restrained. Simultaneously due to using sequential analysis for the remain detection, the probability of false and missing alarm is avoided. The scheme is illustrated through simulations applying the automatic terrain following flight control system of a fighter. Considered the stability of closed loop feedback system, sensor online fault isolation and reconfiguration is achieved.