Dynamic Scheduling In Networked Control Systems With Communication Constraints Of Quantitative Control Of Collaborative Design

Nowadays, with the development of automation technology, computer science and networked communication technology, networked control system has been applied in many fields of production and life. In this paper, the co-design scheme of dynamic scheduling and quantized control for networked control systems with media access constraints and bit rate constraints is investigated. The main achievements are as follows:The problem of quantized feedback stabilization for a class of networked control systems with time delay and packet dropout is investigated. First, a primitive quantizer is applied to the communication channel and the lower bounds of bit rate is given to guarantee convergence of quantization error. Second, dynamic quantization error is represented by quantization range via coordinate transformation, then stabilization problem of closed-loop networked control systems is studied and a state feedback controller design method is given to guarantee the closed-loop system mean-square stable through Lyapunov stability theory and linear matrix inequality techniques.A co-design scheme of TOD dynamic scheduling strategy and quantized control for a class of networked control system with time delay is proposed in this paper. Sufficient condition of bit rate is given to guarantee convergence of quantization error by Lyapunov stability theory. Considering effect of TOD dynamic scheduling strategy and quantization, the networked control system is modeled as a discrete-time switched system. Furthermore, dynamic quantization error is represented by quantization range via coordinate transformation, and a state feedback controller design method is given to guarantee asymptotic stability of the closed-loop system.A simultaneous design of dynamic scheduling strategy and quantized control for networked control system with bit rate and media access constraints is proposed in this paper. Due to media access constraints and scheduling strategy, quantizer inherently works under Multi-modes condition. Lower bound on the rates under arbitrary switching is given to guarantee convergence of quantized error. Furthermore, the networked control system with communication constraints is modeled as switched system with parameter uncertainties, then a minimum scheduling strategy and quantized controller are design simultaneously to guarantee the asymptotic stability of the closed-loop systems.Finally, A co-design scheme of bit rate assignment and controller is proposed for networked control systems with multiple plants using primitive quantizer in this paper. All the nodes can not get the rate condition to guarantee quantized error convergence at the same time because of communication constrains, so two bit rate modes are offered. Every subsystem is modeled as discrete switched system with parameter uncertainties, then bit rate assignment strategy and quantized controller are design simultaneously to guarantee the index stability of the closed-loop systems with switched systems theory and average dwell time technology.