Design Of Networked System Controller Based On Quantization And Event Triggering

The network control system is a distributed control system that exchanges information through the network in the control loop.Compared with the traditional control system,it has the advantages of low power consumption,easy installation and maintenance,and remote operation.However,the introduction of the network has produced a series of new problems,resulting in a decrease in system performance.Therefore,the control problem of the network control system has received extensive attention.In this paper,a logarithmizer is added to the network control system with time-varying delay,and the system model under different trigger modes is established.The system stability is analyzed through the new Lyapunov function and the design method of state feedback and output feedback controller is given.The research content of this article can be divided into the following three parts:(1)For a class of network control systems with time-varying short delays,the state feedback controller of the system is designed based on quantification.Consider adding a logarithmic quantizer between the sensor and the controller.The quantizer part adopts a codec and uses the generalized augmented matrix method to establish a new network control system model that includes time delay and quantization information.In the stability analysis of the system,a new Lyapunov function that depends on the quantization error is used,combined with the linear matrix inequality method,to analyze the stability of the system and give the design method of the state feedback controller.The final Matlab simulation example verifies the effectiveness of the proposed method.(2)For a class of network control systems with time-varying short delays,a dynamic output feedback controller is designed based on quantification.Consider adding a logarithmic quantizer between the sensor and the controller.The quantizer part uses a codec,uses a sector-bounded method to describe the quantization error,establishes a new network control system model that includes time delay and quantization information,and adopts a new Lyapunov function that depends on the quantization error,combined with the linear matrix inequality method,analyzes the stability of the system and gives the design method of the output feedback controller.The final Matlab simulation example verifies the effectiveness of the proposed method.(3)For a class of network control systems with time-varying short delays,a state feedback controller is designed based on quantization and event triggering.The system uses an event trigger mechanism and quantifies the data successfully sent.The sector-bounded method is used to describe the quantization error,and a new mathematical model is established.Using the Lyapunov function that depends on the quantization error,combined with the free weighting matrix method to analyze the stability of the system,the design method of the state feedback controller is given,and the conditions for the stable operation of the system under the denial of service attack are studied.The final Matlab simulation.An example verifies the effectiveness of the proposed methods.