Analysis And Control Of Networked Control Systems

The major research content of this paper is the modeling method, stability analysis and the controller design of the NCSs with time-delay. Firstly, in the paper the author analyzes the mechanism, causes and characteristics of time-delay, and the effects made onto the control performances is analyzed also. Suppose the network-induced delay is time-varying and uncertain, the models of the closed-loop NCSs when the time-delay is less than one sample and more than one sample are established, respectively. Based on Lyapunonv function and linear matrix inequality (LMI), the sufficient conditions which are subject to the asymptotic stability and H∞performance are derived, and the design methods of the controllers are also presented, which show good performance to reduce the influence of the disturbance. At last, the prospect of NCS and some issues that should be researched are pointed out.