Networked Predictive Fuzzy Control systems with random time delay in the forward channel

This paper presents a novel Networked Predictive Fuzzy Control (NPFC) framework to deal with the random delays existed in the forward communication channel. It uses the error between the reference and the predictive outputs from a model predictor and the change of error as two input variables of a fuzzy controller. Thus a series of future control actions are generated. These control actions can be transmitted from the controller side to the plant side with the form of data packet and stored in the buffer of the plant side. By selecting the appropriated control sequence, the random network delays are compensated. The simulative results demonstrate that the proposed method can obtain similar performance with the local PID control at the same case of rising time.