Output Feedback H_? Control Of Networked System Based On Single-channel And Dual-channel Event-triggered Mechanism

With the rapid development of modern computer technology and the low cost and easy maintenance of network control systems(Network Control Systems,NCSs),NCSs is widely used in aviation,industrial control and other fields.In order to effectively reduce network computing resources,the event-triggered mechanism has gradually replaced the timetriggered mechanism and has become a research hotspot.In addition,in the actual control system,due to its own physical mechanism constraints,saturation characteristics are universal.The existence of saturation characteristics will degrade the performance of the control system,and even make it difficult for the control system to maintain a stable state.Therefore,the research on saturation control has important value and significance.This paper mainly studies the saturation control of networked systems based on single-channel and dual-channel eventtriggered mechanisms.The main works can be summarized as follows:First,we discuss the output feedback H-infinity control problem of the NCSs based on the dual-channel event-triggered mechanism.The event-triggered mechanism is designed in the plant-controller and controller-plant channels to improve the efficiency of sampling data transmission.A time-delay closed-loop system is established by using the time-delay method and interval decomposition methods.Finally,using the Lyapunov-Krasovskii functional(Lyapunov-Krasovskii Functional,LKF)method and the linear matrix inequality(Linear Matrix Inequality,LMI)method,sufficient conditions are given such that the NCSs have Hinfinity performance indicators.Furthermore,the dynamic output feedback H-infinity controller is designed.Then,we discuss the design of dynamic output feedback controller(Dynamic Output Feedback Controller,DOFC)for NCSs based on single-channel event-driven scheme,and actuator and sensor saturation.We design an event-triggered mechanism in the output channel,and consider the constraints of sensor and actuator saturation,and then establish a closed-loop system model.By using the LKF method,the sufficient conditions for the H-infinity performance of the closed-loop system based on LMI are given.On this basis,the design method of DOFC is given.Finally,we discuss the output feedback H-infinity control problem of a networked system with saturation constraints based on a dual-channel event-driven mechanism.In order to reduce the burden on the network,event-triggering conditions are designed in the channels at both ends.Then the saturation constraints and the influence of the network time-varying delay are considered at the same time to establish a time-delay closed-loop system.The LKF method and LMI technology are combined to analyze the asymptotic stability and H-infinity performance of the closed-loop system.Then design method of the H-infinity controller is given.