Networked Control Systems with Novel Smith Predictor and CMAC-PID Control

In order to availably restrain the impact of network delays for networked control systems (NCS), we propose a new approach that novel Smith predictor combined with the CMAC and PID control for the NCS. This method realized the feedback control by using traditional PID controller to enhance the stability and reject the disturbance, and realized the feedforward control by using CMAC neural network to increase the response speed and control precision. Because new Smith predictor does not include network delay, therefore, it is no need for measuring on line, identifying or estimating network delays. Based on CSMA/CD (Ethernet), the results of simulation experiment show validity of the control scheme and improvement in dynamic performance and robustness of NCS.