The Research Of Event-driven Control Strategy On Networked Control Systems

Networked control systems relate to computer, communication, network, automatic control and many other fields. At the same time, it has strong background of engineering application, such as, petroleum and chemical industry, metallurgy and other control of industrial production, the monitoring and scheduling for regional power grid, Real-time command and control of traffic system, decision-making control and high precision of real-time control on satellite networking and so on. In the networked control systems, the communication between the plant and controller is achieved through public network, which make the networked control systems have the following advantages:remote operation and control, low-cost, better date exchange, resource sharing......Therefore, the research on networked control system has significant theoretical value, having become a hot spot in China and abroad in recent years.The networked control systems(NCSs) is a feedbck system which is formed by network.The dates transmited among sensors, controllers and actuators are no langer point to point, but through a public network platform, namely Space Distributed Systems。In traditional sampled-data control framework, sampling is activated the system uniformly in time with a constant sampling period T, which is termed as time-triggered sampling, however,in the case of poor network communication capability, the time-triggered sampling simplifies design and analysis, it may lead to higher system costs and network congestion, network delay and the data packet loss probability, and then it may lead the unstabilizafion of the closed-loop system. The aim of this paper is to propose an event-triggered control strategy, and research the problem of the event-triggered networked control systems with the network transmission delay, data packet loss and other networked problems. First, we propose the event-triggered control strategy and establish the event-triggered mathematical model of networked control systems. Furthermore,research the event-triggered control strategy for state feedback and output feedback without external disturbance or with real external disturbance and the self-triggered control strategy. Final, we design the network predictive compensation controller based on event-triggered control stategy. Numerical results are given to demonstrate the validity and potential of the proposed event-triggered controllers.This paper aims to propose a set of relatively complete design and analysis method for event-triggered networked control systems, and provide theoretical support for the networked control systems in practical application.