具有随机丢包的非线性网控系统的鲁棒H_∞故障检测

Robust H_∞ Fault Detection for Nonlinear Networked Control System with Random Packet Dropout

针对具有模型不确定性和状态时滞的非线性网控系统,对它具有随机丢包的鲁棒H∞故障检测问题进行研究。采用动态故障检测滤波器构造残差产生器,将鲁棒H∞故障检测问题转化成H∞滤波器设计问题。所设计的鲁棒故障检测滤波器保证了故障检测系统均方渐近稳定且具有特定的H∞性能指标γ。数值仿真结果表明:利用该方法能够迅速准确地检测出系统的故障信号。

Regarding the nonlinear networked control system which boasting of model uncertainty and state delay,its robust H∞fault detection troubled by the random packet dropout was investigated,in which,having a dynamic fault detection filter employed as a residual generator and having robust H∞fault detection converted into the H∞filter design problem so that designed robust fault detection filter( RFDF) can make the fault detection system's mean-square asymptotically stable and to satisfy a prescribed H∞performance indexγ. A numerical simulation result shows that this proposed approach can detect the fault fast and precisely.