基于降维观测器的网络控制系统的容错控制

针对被控对象是线性定常系统的网络控制系统,设传感器与控制器均为时间驱动,未能成功传输数据的传感器节点视为暂时失效,将网络控制系统建模为一类具有时变传感器"故障"的系统。此类系统相当于一个有限子系统的切换系统。借助容错控制和切换系统理论,利用Luenberger降维观测器估计系统状态,采用李亚普诺夫理论和线性矩阵不等式描述方法,给出了闭环系统渐近稳定的充分条件和控制器的设计方法。通过Matlab数值仿真算例,证明了分析方法和结果的有效性。

Fault-tolerant Control of Networked Control Systems Based on Reduced-order Observer

Considering a networked control system with an linear time-invariant plant,the sensors and controllers are assumed time-driven,the sensors failing to transmit data are treated to be invalidated temporarily,and the networked control system is modeled as a system with time-variant sensors fault.Such a system is a switched system with finite subsystems.With the theory of Lyapunov and linear matrix inequality formulation,the sufficient condition for the asymptotic stability of the closed-loop system is proposed based on Luenberger reduced order state observer and the design approach of the controller and observer is given.A numerical simulation example with Matlab shows that the analysis method and the results are valid and feasible.