基于滑模变结构的导弹伺服机构故障诊断

针对导弹伺服机构的不确定非线性特点,提出了一种基于滑模变结构的传感器故障诊断方案。首先给出一种基于滑模变结构的控制器设计方法,然后利用滑模变结构中的等值控制方法设计了状态观测器,再利用自适应方法实现了对故障的重构。最后将提出的方法在导弹伺服系统中应用,表明了该方法的有效。

Missile Servo System Fault Diagnosis Method Based on Sliding Mode Variable Structure

According to uncertainty and nonlinear characteristic of missile Servo System, A sensor fault diagnosis proposal for a class of nonlinear system is presented in this paper. The studied uncertain nonlinear system is with unknown input disturbance. First, a controller is designed based on sliding mode variable structure theory. A design of state observation also based on sliding mode variable structure theory but by use of a specific equivalent control methodology follows. Then, by means of adaptive method, the fault identification which can restructure the faults is studied. The results of some numerical simulations on an artillery position servo system verify the validity of the proposed approaches.