Design of state predication controller in discrete networked control system

Networked control system (NCS) is distributed feedback control system which has the advantage of greater flexibility with respect to traditional control systems. Also, it allows for reduced wiring, as well as a lower installation cost. It also permits greater agility in diagnosis and maintenance procedures. Therefor, some problem such as time delay, data package loss, may occur in the network. Transmission, which can make the analysis to NCS a difficult task. Because the classical control theory can not be directly applied to NCS controller design. Whereafter, a delay compensation arithmetic is studied to reduce or eliminate the influence of the network transmission to the control computing. Also, the necessary and sufficient conditions for this kind of NCS stability are derivated. It is proved that networked delay can be compensated by state prediction arithmetic by the use of simulation.