Resource Constraints Scheduling And Control Of The Network Control System Co-design

In the network control system, the network resource constraints caused by limited network bandwidth, are the important factors that affect the system control performance. Therefore, a co-design problem of scheduling strategy and control for the networked control systems with resource constraints is studied in this paper. The main achievements are as follows:Firstly, a co-design scheme of MEF-TOD dynamic scheduling strategy and feedback controller for a class of networked control systems with communication constraints and random time delay is proposed. Considering communication constraints and random time delay, the NCS is modeled as a discrete-time switching system with parameter uncertainty. Based on the Lyapunov function and switching system theory, the procedures for state feedback controller and H-infinity controller design under MEF-TOD scheduling strategy are given to maintain the asymptotic stability and robust performance of the system.Secondly, a co-design scheme of static period quantitative and scheduling strategy and feedback controller for a class of networked control systems with limited bandwidth using mid-tread uniform quantizers is proposed. Through allocating bandwidth, quantitative control and scheduling strategy are synchronously considered. The quantization error is treated as sector-bounded uncertainty, and the NCS is modeled as a discrete-time switching system with parameter uncertainty. The procedures for state feedback controller and H-infinity controller design under the strategy are given to maintain stability and robust performance of system.Thirdly, a co-design scheme of MEF-TOD dynamic quantitative and scheduling strategy and dynamic output feedback controller for a class of networked control systems with limited bandwidth using mid-tread uniform quantizers is proposed. The encoding bits of quantizers are determined by minimum accuracy requirements of the transmitted signals, and the NCS is modeled as a discrete-time switching system through scheduling network nodes using MEF-TOD scheduling strategy. Finally a procedure for dynamic output feedback controller design under the strategy is given to maintain the asymptotic stability of closed-loop system.Finally, the simulation examples demonstrate the efficiency of the proposed methods based on Truetime toolbox.