Passivity-Based Analysis And Control For Networked Control Systems With Packet Dropout

With the continuous development of computer technology and communication technology,the Integration of control systems and network communication systems make Networked Control System becomes inevitable product of the development of integrated automation technology.The introduction of network creates a great improvement in the system performance,but inevitably lead to network delay,data packet dropout,multi-packet transmission and other problems.These problems will cause the system performance degradation or even instability.Dissipative theory plays an important role in the stability research of control systems.The implication is that there exists a nonnegative energy function(namely store function)such that the energy consumption of a control system is always less than the supply rate of the energy.The passivity is an important part of the dissipative.It takes the product of the input and the output as the supply rate of the energy,which embodies the attenuation property of a system under bounded exogenous input.Therefore,this paper introduces the passivity theory as the tools for study networked control systems with packet dropout.With the improvement of system resource utilization in practical applications,Time-triggered scheme used in the traditional network control system has been difficult to meet the application requirements.Therefore event-triggered control get a lot of attention since it has advantage in saving unnecessary waste of system resources.In this paper,we study the state feedback control and the output feedback control for networked control systems with packet dropout.Respectively use passivity theory and passivity-based event-triggered control scheme,research on the stabilization of considered networked systems system.The main results are as follows:Firstly,we consider a class of a continuous-time linear time-invariant state feedback systems under the influence of packet dropout.Assume the consecutive packet dropout in the network is a constant and has been maximal consecutive packet dropout.The networked control system can be regarded as a class of sampled-data control system.Based on average passivity theory,the condition for Networked control system under the influence of packet dropout can achieve an average passive is fixed the output system.And design the state feedback controller which guarantee closed loop networked control system asymptotically stable.Then a simulation example is given to illustrate the feasibility and validity of the results.Secondly,we consider a class of a continuous-time linear time-invariant output feedback systems under the influence of packet dropout.Introduced passivity-based event-triggered scheme,under the premise of ensuring the asymptotic stability of the closed-loop system,and give a sufficient condition for the existence of the event-triggered condition and the output feedback controller.Furthermore,we prove that the inter-sampling intervals are strictly positive in the proposed event-triggered condition.Then a simulation example is given to illustrate the feasibility and validity of the results.Finally,summarized the full text,and the next step of the research work is given.