基于自适应滑模观测器的故障诊断

讨论了一类线性系统执行器故障的诊断问题.首先应用状态和输出变换,将原系统转化为两个低维子系统,再利用滑模观测器设计理论和等价控制概念重构执行器故障.考虑到实际系统中的不确定因素,上述方法推广到一类线性扰动系统,提出了基于自适应滑模观测器的故障诊断算法.最后,将所提算法应用于某型飞机模型的故障诊断.

Adaptive sliding mode observer-based fault diagnosis

This paper considers the problem of actuator fault detection for a class of linear systems.First,the system is decomposed into two subsystems using state and output transformations,and then actuator fault can be directly reconstructed according to the sliding mode observer theory and the concept of the equivalence control.In real systems,there always exist uncertainties,thus the proposed method is extended to a class of linear systems with disturbances,and fault diagnosis algorithm is developed based on adaptive sliding mode observer.