Research On Event-driven Control Strategy Of Networked Control System With H? Performance Index

With the rapid advancement of modern control technology,networked control systems have gradually become a hot topic in the field of control because of its many advantages.However,due to network bandwidth limitations,there is a large amount of redundant data in the communication network.In order to maintain the stability of the network,researchers designed event triggering mechanisms to be applied to networked control systems.In the theoretical research of networked control systems based on event-triggered mechanisms,the Lyapunov-Krasovskii function is often constructed for the system,and the function is theoretically analyzed to explore the performance of the system.Firstly,the paper analyzes the H? performance of the system for a linear nominal system using a state-relative trigger mechanism.In order to reduce the conservativeness of the system,an appropriate Lyapunov-Krasovskii function is constructed.For the integral term generated after the above functional derivation,the Wirtinger inequality is selected for scaling.The condition that the closed-loop system represented by the linear matrix inequality satisfies the perfonnance index and the solution of the controller are obtained.Then,design a relative trigger mechanism for the signal input.Combine the trigger mechanism to analyze the performance analysis of the closed-loop system.At the same time,in order to further reduce the conservativeness,the free weight matrix inequality is used to scale in the integral term after the functional derivation,and the sufficient conditions for the event triggering system to meet the H? performance index expressed by the linear matrix inequality are given.The analytical expression of the controller is given.Finally,in order to further reduce the conservativeness of the results,the Lyapunov-Krasovskii function constructed by the idea of time-delay segmentation is introduced.At the same time,based on the relative trigger mechanism,the absolute trigger mechanism is added to construct a hybrid trigger mechanism.Then the Lyapunov theory and the linear matrix inequality are used to analyze the H?performance of the closed-loop system.Based on this,the design scheme of the controller is given.The simulation experiments in each chapter are given at the end of each chapter to verify the effectiveness of our proposed methods.