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An Improved GPC Hybrid Network Control

Aiming at the problem that the random delay of networked control system (NCS) induces the system performance worse or even unstable, this paper proposes an Improved Generalized Predictive Controller (IGPC). Without considering the delay, the IGPC is combined with Proportional differential (PD) controller. A hybrid network predictor is proposed to obtain the multi-step control increment. The fitting algorithm is adopted to avoid the prediction of time delay. The control variable is selected based on the output of the system instead of the variables that calculate by the prediction value of time delay, which can improve the performance of the system control. The simulation results show that this method can effectively improve the effect of time delay on the system, improve the response speed of the system, and reduce the overshoot.