Probabilistic-Constrained Tracking Control For Networked Control System

In recent years,with the rapid development of science and technology,the information age with the computer network as the medium is pushing the complex industrial control systems represented by traditional industries,steel,electric power,etc.to the direction of deep integration of cyber-physical systems.Thus,it gave birth to a new type of control system-networked control system.Since its inception,the system has been widely used in military,aerospace,navigation and guidance and other fields.However,the complex and changeable network environment also brings a series of new problems,such as cyber attacks and transmission limitations,which bring new challenges to the design of observers/controllers that meet the desired performance indicators.In this paper,for a class of nonlinear networked control systems,considering network conditions such as cyber attacks and measurement outliers,the tracking observer and controller are designed to satisfy the given probability constraints.The main work is as follows:The problem of tracking controller design for a class of nonlinear networked systems under probability constraints,network attacks and measurement outliers is studied.First,considering the influence of aperiodic denial of service attacks and measurement outliers,an observer based on saturation function is designed to weaken the influence of outliers.The probability-constrained tracking controller designed in this paper can ensure that the probability of tracking error falling on a given set of ellipsoids is lower than a given value,and the obtained ellipsoids are minimized in the sense of matrix norm.Secondly,the sufficient conditions for the estimation error and tracking error to satisfy the variance constraint and the probability constraint are obtained with the help of the matrix algorithm,and the estimator and controller parameters are solved with the help of Matlab.Finally,the reliability and effectiveness of the designed tracking controller scheme are demonstrated through numerical simulation.The Round-Robin(RR)communication protocol and the tracking control problem of networked control system under deception attacks are discussed.First,in order to alleviate the computational burden of the communication network,this paper introduces the RR protocol to schedule network data transmission,and designs the tracking controller under the consideration of deception attacks to ensure that the probability that the tracking error exceeds a given threshold is lower than a predetermined value.Furthermore,with the help of the recursive linear matrix inequality method,sufficient conditions for satisfying the probabilistically constrained performance metrics and expected controller and estimator parameter matrices can be obtained.Finally,the effectiveness of the designed scheme is verified by two simulation examples.