A Novel Smith Predictor for Wireless Networked Control Systems with Uncertainty

This paper aims at time-variant or uncertain wireless network delay in the wireless networked control systems (WNCS), a new Smith dynamic predictor is proposed.Because new Smith dynamic predictor hides predictor model of the network delay into real transmission process of the network data, further the network delay no longer need to be measured, identified or estimated on-line. It is applicable twosome occasions that wireless network delay is random, time variant or uncertain, possibly large compared to one, even tens sampling periods, at the same time, there are some data dropouts in closed loop. Based on IEEE 802.15.4 (ZigBee), the results of simulation show validity of the compensation scheme in the WNCS, and indicate that system has better dynamic performance and robustness.