Research On Filtering Of Discrete Distributed Time-delay Network Control System

With the advancement of the times,extensive application of computer networks and automation technologies,Networked Control Systems?NCS?is an inevitable trend in the development of control systems.Scholars have conducted in-depth research on network control systems and achieved many innovative results.The network control system has the advantages of low cost,high reliability and flexibility.However,the introduction of the network causes information transmission delays,packet loss,and quantification issues to be considered in the study of NCSs.The study of network control systems is from simple to complex processes,from continuous time to discrete time to mixed time,from linear system to nonlinear system,which is gradually studied in depth.The research on control theory of network control systems is also moving forward.Firstly,focuses on the problem of quantized filtering with discrete distributed time-delay network control.Due to the introduction of the network,packet loss and quantization problems are caused.Packet loss is characterized by the Bernoulli random distribution sequence.The quantification problem is to apply a sector-bounded method to describe quantization error as parameter uncertainty.According to the idea of Lyapunov function,the sufficient conditions for the network filter error system to be asymptotically stable and satisfies H_?andl₂-l_?performance are given,and the parameters of the filter with linear matrix inequality are solved.Secondly,consider a discrete distributed time-delay nonlinear network control system,establish a Lyapunov-Krasovskii functional and apply linear matrix inequality?LMIs?methods to analyze and design the H_?filter of a discrete distributed time-delay networked control system.The filter error system is asymptotically stable in the mean square and satisfies the sufficient condition for the filter to reach the H_?performance index.The parameters of the filter are determined by solving a linear matrix inequality,and the effectiveness of the method of the designed filter is verified by numerical simulation.Finally,for the engineering background of the actual earth orbit rendezvous and docking,a dynamic model of the earth orbit rendezvous and docking system is abstracted using the improved C-W equation.A filter for the Earth orbit rendezvous and docking system under discrete conditions was designed to complete the application in the engineering context.