Networked control systems based on generalized predictive control and modified Smith predictor

Abstract

The distributed control networks encounter nondeterministic delays in data communication between sensors, actuators and controllers, including direct-feedback control and higher level supervisor control. Aiming to uncertain network delays, time-variant or nonlinear controlled plant and imprecise Smith predictor models, a novel approach is proposed that modified Smith predictor combined with generalized predictive control (GPC). Because modified Smith predictor does not include network delay models, so it is no need for measuring, identifying or estimating network delays on line. The GPC enhances the systematic robustness and anti-jamming ability. Based on CSMA/CD (Ethernet) and CSMA/AMP (CAN Bus), the simulation results show that modified Smith dynamic predictor combined with GPC is effective.