Networked Control Systems Analysis And Design Based On Pole Assignment

Networked Control Systems(NCSs)is a control system that consists of control theory,sensors,network communications,computers,and power electronics.It is easy to install and maintain,convenient to expand,and costs relatively low.The NCSs also have some problems inevitably,such as,random network time delay,data packet loss,data disorder,and etc.In serious case,they will lead to system instability.Therefore,it is necessary to study and solve these problems.In view of this,this paper mainly analyzes the NCSs with random short time delay and random packet loss.The specific work we do is as follows:First,we introduce the basic concept of NCSs and expound the purpose and significance of the research,and then summarize the development process of NCSs and the related research status.The corresponding theorems and methods of linear matrix inequalities are also introduced or proved.Second,the NCSs with random short time delays are described as switching models among a limited number of subsystems.Based on the principle of pole assignment for system and continuous variation of characteristic roots,the relationship between time delay and the characteristic roots maximum length of the augmented matrix is determined,and the appropriate controller parameters and the actuator work period are chosen.This method simplifies the analysis and solving process,and the design of the controller is more flexible.Then,NCSs is modeled basing on bilateral random time delay and packet dropout.By the stability theory of asynchronous dynamic systems,comparison between the linear matrix inequality method and the pole assignment method are made.Finally,the simplicity and validity of the pole assignment method are illustrated by both simulation and experiments.