Compensation method of networked control system

With the more and more larger scale of the control systems, many control systems are constructed as networks through fieldbus technology. The information such as sensor signals and controller signals are transferred through the network. Because of the limitations of communication bandwidth and information collision, it is inevitable that there exists time delay in the Networked Control System. According to the transmitted time-delay, a kind of state-observer with the ability to compensate time-delay is designed, and the control law is achieved using the Linear Matrix Inequality method. Then the stability of the closed-loop system is analyzed. The result of the simulation experiment shows the validity of the proposed method.