一类随机时延网络控制系统的随机容错设计

Stochastic fault-tolerant design for a class of networked control systems with random time-delay

针对网络化控制系统的传感器失效及执行器失效和网络时延均具有随机性这一现象,将传感器和执行器的故障建模为相互独立的Bernoulli随机序列,时延建模为Markovian,建立了具有Markovian跳变随机时延的网络化控制系统,并研究了该系统存在传感器失效、执行器失效以及二者同时失效的随机容错控制问题。通过构造增广的状态向量,以LMIs的方式给出了系统随机稳定容错控制器的设计方法。

Considering the random phenomenon of sensor failure, actuator failure and networked time-delay, random sensor failure and aetuator failure were modeled as independent Bernoulli random sequence, and random time-delay was modeled as Mark- ovian. The networked control system with Markovian random time-delay was also established, and then the problem of stochastic fault-tolerant control with the existence of sensor failure, actuator failure, or failure of the both for the constructed system was inves- tigated. By using augmented state-space vector, a designing method of eontroller with stochastic stable fault-tolerance was provided by LMIs.