Guaranteed Cost Controller Design for Wireless Networked Control Systems Based on Deadband Scheduling

A deadband scheduling policy based on system errors is presented for wireless networked control systems (WiNCS), in which the characteristics of WiNCS are considered, such as limited network bandwidth, limited node energy, high network collision probability and dynamic mobile node. The control variable is computed and transmitted only if the absolute value of system error is larger than the given threshold of deadband. The model of WiNCS based on deadband scheduling with parametric uncertainties and network-induced delay is established, in which the deadband scheduling is described by the nonlinear function. And the guaranteed cost controller is designed by using Lyapunov-Krasovskii methods. The results of simulative experiments indicate that the data transmission rate of the controller is reduced efficiently by the proposed approach, and the control performance is guaranteed.