Design Of Network Control System Based On Event-driven Mechanism

Along with the information technology changing rapidly,the network control system is widely used in various fields,the traditional control mode has been difficult to meet the requirements of the corresponding structure and the engineering system is more complex,the traditional control system change imperative.The progress of technology and the improvement of control requirements jointly promote the further development of NCSs(networked control system).After the fusion of network and control system enables NCSs to realize resource sharing,high reliability,easy installation and maintenance,fault diagnosis and other convenience,at the same time produced by network induced delay,packet loss,communication to limit the adverse factors will make the performance of the control system have adverse consequences.This makes the control system analysis and research increase the great pressure.In order to meet the real-time demand,make full use of network resources.More and more attention has been paid to the research of event driven mechanism.The introduction of event triggered communication strategy can effectively solve this kind of problem,this paper mainly to the event driven mechanism NCSs as the research object,design of the mathematical model,robustness analysis,controller,complete control system quality and service quality of the network optimization.The main contents of this paper are as follows:Firstly,this paper briefly introduces the background and significance of the network control system,the definition,the structure,the basic energy and the content of the research.Research progress and results summarized the event trigger mechanism,separately from the network induced delay,packet loss and the current status of the research of event triggered mechanism based on networked control systems are discussed,and given the need to use the main lemma and the symbolic description in this paper.Secondly,according to the content of NCSs network delay,the problem of network delay controller design based on event driven mechanism.By constructing the mathematical model of time delay network control system based on event driven mechanism,by using the Jensen inequality method,the Lyapunov-Krasovskii function is proved.Analysis of system dependent delay stability.The design of controller for time delay NCSs is presented.Thirdly,we study the problem of packet loss compensation controller design for NCSs based on event driven mechanism.Based on the characteristics of non-uniform distribution of NCSs packet loss,two different switching controllers are used to establish the system model of data packet loss and no packet loss.The event driven mechanism is used to construct a non-uniform mathematical model,and a new Lyapunov-Krasovskii functional is constructed by using the Jensen inequality method.The stability analysis of the NCS controller is given,and the design of the system is presented.Finally,considering the effect of the performance parameters of control system and network dynamic performance of event trigger conditions,the event triggered communication mechanism and network control system depends on the sampling error model,using the method of Lyapunov-Krasovskii functional theory and linear matrix inequality,the design of system performance analysis and control of network are given the performance of the system meet the specific event trigger condition and the controller feedback gain design algorithm,finally,through the Matlab example proves that the method of collaborative design...