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Anti-asynchrony output regulation for switched systems under switching-Q-learning event-triggering against DoS attacks

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Science China(Information Sciences) 2024年第11期67卷 194-210页

作者： Lili LI Yalin CHEN Dan MA Qingjun GUO College of Marine Electrical Engineering Dalian Maritime University State Key Laboratory of Synthetical Automation for Process Industries Northeastern University College of Information Science and Engineering Northeastern University

This paper proposes a secure output regulation(SOR) scheme for network switched systems(NSSs) experiencing severely unstable dynamics(SUDs). This scheme aims to address the complex consecutive asynchrony caused by long-duration denial-of-service(LDDoS) attacks. When the denial-of-service(DoS) attack lasts longer than the dwell time of each subsystem, switching to a new subsystem is necessary to manage the unstable dynamic behavior caused by SUDs. The controller cannot immediately obtain information about the new modality. However, owing to the delayed access to new modality information by the controller, consecutive asynchrony occurs. To tackle this, we propose a resilient switching rule that mitigates the impact of consecutive asynchrony by choosing the optimal subsystem once the minimum dwell time is met. Multi-stage event-triggering mechanisms(METMs) are proposed to coordinate with switching signals by incorporating modality matching conditions and a switching-Q-learning algorithm. These mechanisms reduce asynchronous durations by aligning modality matching conditions and terminating attacks using attack parameters. This control scheme for SOR of NSSs with SUDs disturbed by LDDoS attacks provides a detailed analysis of dynamic switching behavior, leveraging the resilient switching rule and METMs. Finally,the feasibility of the proposed methodology is substantiated through simulations with an F-18 aircraft model.

关键词： switched systems long-duration DoS attacks consecutive asynchrony switching-$Q$-learning algorithm multi-stage event-triggering resilient switching rule

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Interpolated Bumpless Transfer Control for Asynchronously switched Linear systems

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1579-1590页

作者： Shengao Lu Tong Wu Lixian Zhang Jianan Yang Ye Liang the School of Astronautics Harbin Institute of TechnologyHarbin 150080China the Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore IEEE

This paper revisits the problem of bumpless transfer control(BTC) for discrete-time nondeterministic switched linear systems. The general case of asynchronous switching is considered for the first time in the field of BTC for switched systems. A new approach called interpolated bumpless transfer control(IBTC) is proposed, where the bumpless transfer controllers are formulated with the combination of the two adjacent modedependent controller gains, and are interpolated for finite steps once the switching is detected. In contrast with the existing approaches, IBTC does not necessarily run through the full interval of subsystems, as well as possesses the time-varying controller gains(with more flexibility and less conservatism) achieved from a control synthesis allowing for the stability and other performance of the whole switched system. Sufficient conditions ensuring stability and H_(∞) performance of the underlying system by IBTC are developed, and numerical examples verify the theoretical findings.

关键词： Asynchronous switching bumpless transfer H_∞control switched systems

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Distributed H2/H∞ Filter Design for Discrete-Time switched systems

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 158-168页

作者： Nezar M.Alyazidi Magdi S.Mahmoud systems Engineering Department King Fahd University for Petroleum and Minerals

This paper addresses an infinite horizon distributed H2/H∞ filtering for discrete-time systems under conditions of bounded power and white stochastic signals. The filter algorithm is designed by computing a pair of gains namely the estimator and the coupling. Herein, we implement a filter to estimate unknown parameters such that the closed-loop multi-sensor accomplishes the desired performances of the proposed H2 and H∞ schemes over a finite horizon. A switched strategy is implemented to switch between the states once the operation conditions have changed due to disturbances. It is shown that the stability of the overall filtering-error system with H2/H∞ performance can be established if a piecewise-quadratic Lyapunov function is properly constructed. A simulation example is given to show the effectiveness of the proposed approach.

关键词： Bounded power stochastic disturbance discretetime systems H2/H∞ filtering infinite horizon multi-sensor switched systems

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Fault Detection for Uncertain Delta Operator systems with Two-Channel Packet Dropouts via a switched systems Approach

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Journal of systems Science & Complexity 2020年第5期33卷 1446-1468页

作者： ZHANG Duanjin ZHANG Yinshuang School of Information Engineering Zhengzhou UniversityZhengzhou 450001China

This paper utilizes a switched systems approach to deal with the problem of fault detectio for uncertain delta operator networked control system with packet dropouts and timevarying *** exist in the matrices of the systems and are norm-bounded *** parts of packet dropouts are considered in this paper:From sensors to controllers,and from controllers to *** independent Bernoulli distributed white sequences are introduced to account for packet *** an FD filter is designed under an arbitrary switching ***,the sufficient conditions for the NCSs under consideration that are exponentially stable in the mean-square sense and satisfy H∞performance are obtained in terms of linear matrix inequalitie,multiple Lyapunov function and average dwell-tim *** explicit expression of the desired filter parameters is ***,a numerical example verifies the effectiveness of the proposed method.

关键词： Delta operator fault detection networked control systems packet dropouts switched systems

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Bumpless transfer fault detection for switched systems: a state-dependent switching approach

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Science China(Information Sciences) 2021年第7期64卷 117-131页

作者： Guangdeng ZONG Chunxiao HUANG Dong YANG School of Engineering Qufu Normal University

This paper focuses on the bumpless transfer fault detection problem for switched systems under state-dependent switching. The goal is to find an effective constraint on filters and an appropriate switching signal to reduce the bumps of residual signals caused by switching while achieving expected fault sensitivity and robustness of the filtering systems. For transient behavior description, a novel bumpless transfer constraint is proposed to limit the amplitude of residual signals into a bounded range at the switching points. In terms of multiple Lyapunov functions, a state-dependent switching law is designed to realize fault detection performance even if the robustness and fault sensitivity of each subsystem are local. Sufficient conditions for the bumpless transfer fault detection problem are provided in the form of linear matrix inequalities. Finally,a numerical example is given to validate the effectiveness of the developed method.

关键词： bumpless transfer fault detection multiple Lyapunov functions state-dependent switching law switched systems

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Output Feedback Robust H_(∞) Control for Discrete 2D switched systems

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Computer systems Science & Engineering 2021年第10期39卷 69-85页

作者： Wenjun Gao Yang Yang Hongtao Duan Mingsheng Li Jinrong Ma Songwei Jin School of Electronic Information and Engineering Changchun University of Science and TechnologyChangchun130000China Department of Computer Science and Engineering University of CaliforniaRiversideCA92521USA

The two-dimensional(2-D)system has a wide range of applications in different fields,including satellite meteorological maps,process control,and digital ***,the research on the stability of 2-D systems is of great *** that multiple systems exist in switching and alternating work in the actual production process,but the system itself often has external perturbation and *** solve the above problems,this paper investigates the output feedback robust H_(∞)stabilization for a class of discrete-time 2-D switched systems,which the Roesser model with uncertainties ***,sufficient conditions for exponential stability are derived via the average dwell time method,when the system’s interference and external input are ***,in the case of introducing the external interference,the weighted robust H_(∞)disturbance attenuation performance of the underlying system is further *** output feedback controller is then proposed to guarantee that the resulting closed-loop system is exponentially stable and has a prescribed disturbance attenuation levelγ.All theorems mentioned in the article will also be given in the form of linear matrix inequalities(LMI).Finally,a numerical example is given,which takes two uncertain values respectively and solves the output feedback controller’s parameters by the theorem proposed in the *** to the required controller parameter values,the validity of the theorem proposed in the article is compared and verified by simulation.

关键词： 2-D systems robust H_(∞)control LMI output feedback switched systems Roesser model

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Data-driven optimal switching and control of switched systems

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Control Theory and Technology 2021年第3期19卷 299-314页

作者： Chi Zhang Minggang Gan Chenchen Xue School of Automation Beijing Institute of TechnologyBeijing100081China Beijing Institute of Control Engineering BeijingChina China Academy of Launch Vehicle Technology BeijingChina

In this paper,optimal switching and control approaches are investigated for switched systems with infinite-horizon cost functions and unknown continuous-time *** first,for switched systems with autonomous subsystems,the optimal solution based on the finite-horizon HJB equation is proposed and a data-driven optimal switching algorithm is ***,for the switched systems with subsystem inputs,a data-driven optimal control approach based on the finite-horizon HJB equation is *** data-driven approaches approximate the optimal solutions online by means of the system state data instead of the subsystem ***,the convergence of the two approaches is ***,the validity of the two approaches is demonstrated by simulation examples.

关键词： switched systems Optimal switching Optimal control Data-driven control

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Stability Analysis and Anti-windup Design of switched systems with Actuator Saturation

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International Journal of Automation and computing 2017年第5期14卷 615-625页

作者： Xin-Quan Zhang Xiao-Yin Li Jun Zhao School of Information and Control Engineering Liaoning Shihua UniversityFushun 113001China School of Foreign Languages Liaoning Shihua UniversityFushun 113001China State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang 110819China

The stability analysis and anti-windup design problem is investigated for two linear switched systems with saturating actuators by using the single Lyapunov function approach. Our purpose is to design a switching law and the anti-windup compensation gains such that the maximizing estimation of the domain of attraction is obtained for the closed-loop system in the presence of saturation. Firstly, some sufficient conditions of asymptotic stability are obtained under given anti-windup compensation gains based on the single Lyapunov function method. Then, the anti-windup compensation gains as design variables are presented by solving a convex optimization problem with linear matrix inequality （LMI） constraints. Two numerical examples are given to show the effectiveness of the proposed method.

关键词： Anti-windup switched systems saturating actuators single Lyapunov function domain of attraction linear matrixinequality (LMI).

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Safety stabilization of switched systems with unstable subsystems

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Control Theory and Technology 2022年第1期20卷 95-102页

作者： Lijun Long Yiguang Hong State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang110819LiaoningChina College of Information Science and Engineering Northeastern UniversityShenyang110819LiaoningChina Department of Control Science and Engineering Tongji UniversityShanghai201804China

This paper is concerned with the problem of safety stabilization for switched systems where the solvability of the problem under study for individual subsystems is not assumed.A new state-dependent switching strategy with guaranteed dwell-time for switched systems is constructed,and a sufficient condition for absence of Zeno behavior is ***,a novel switched control design method is proposed to simultaneously guarantee the safety of the switched closed-loop system and stabilize the system based on the union of a common barrier function and a single Lyapunov function,which effectively handles the conflict between safety and stability ***,two examples are presented to demonstrate the effectiveness of the proposed design approach.

关键词： Safety stabilization switched systems Common barrier function Single Lyapunov function State-dependent switching

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Stability conditions of complex switched systems with unstable subsystems

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Journal of systems Engineering and Electronics 2004年第4期15卷 568-573页

作者： XiaoYang InstituteofInformationScience NorthernJiaotongUniversityBeijing100044P.R.China

New stability conditions for complex switched systems are presented. We propose the concepts of attractive region and semi-attmctive region, which are used as a tool for analyzing the stability of switched systems with unstable subsystems. Based on attractive region the sufficient conditions with less conservative for stability of switched systems have been established, """"there is no limitation for all members of the system set to be stable. Since our results have considered and utilized the decreasing span of oscillating solutions of the switched systems, they are more practical than the other presented ones of stability of switched systems, and need not resort to multiple Lyapunov functions.

关键词： attractive region stability control switched systems

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