网络控制系统有限频域故障检测和容错控制

Fault detection and fault tolerant control in finite frequency domain for networked control system

考虑网络控制系统中存在的时延,研究了其在有限频域内的故障检测以及容错控制问题。针对有限频域内的故障信号,利用给定指标设计故障检测滤波器产生残差信号。为了保证系统在故障情况下的控制性能,进一步构造基于残差反馈的主动容错控制器对故障进行补偿。给出了故障检测滤波器与主动容错控制器存在并满足有限频域内性能指标的充分条件。利用线性矩阵不等式得到了故障检测滤波器和主动容错控制器参数。数值仿真表明所提方法能够获得良好的故障检测性能和容错控制效果。

The problem of fault detection and fault tolerant control in finite frequency domain for networked control system with random time delay is investigated in this article.Considering the fault in finite frequency domain,the fault detection filter with prescribed performance is proposed.In order to ensure the control performance of the system,an active fault tolerant controller based on residual feedback is proposed to compensate the fault signal.The sufficient conditions of fault detection filter and active fault tolerant controller satisfying given performance in finite frequency domain are derived.The parameters of the fault detection filter and the active fault tolerant controller are solved by linear matrix inequalities.Numerical simulation shows the superiority and effectiveness of fault detection filter and fault tolerant controller.