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Fault diagnosis based on high-gain observer with an update law for a class of nonlinear systems

控制理论与应用（英文版） 2010年第4期8卷 447-452页

作者： Yanjun SHEN (College of Science,China Three Gorges University,Yichang Hubei 443002,China) College of Science China Three Gorges University Yichang Hubei China

In this paper,by using the well-known high-gain observer design,an update law for the gain and an adaptive estimation of parameters,a new method of fault diagnosis for a class of nonlinear systems is *** resort to any transformation for the parameters,the estimation errors of the states and the parameters are guaranteed to be globally exponentially convergent by a persistent excitation *** to the existing results,it can be applied to nonlinear systems with nonlinear terms admitting an incremental rate depending on the measured output.A case study further verifies the validity of the proposed research.

关键词： Fault diagnosis Adaptive estimation high-gain observer Nonlinear systems

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Optimal Disturbance Rejection for Discrete-time Nonlinear Systems with Time-delays via high-gain observer-Based Control

Optimal Disturbance Rejection for Discrete-time Nonlinear Sy...

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2010 Chinese Control and Decision Conference

作者： Shao-Ting Ge,Gong-You Tang,Cheng-Ming Zhang College of Information Science and Engineering,Ocean University of China,Qingdao 266100

＜正＞The discrete-time mathematical models for nonlinear systems with delayed control and measurement are *** on a linearization and a model transformation,the nonlinear system with delays is transformed to a formal nondelay *** the optimal control law with the state feedback term,the disturbance feedforward term, and the control memory term is derived from a discrete Riccati equation and a Stein equation.A high-gain observer is constructed such that the feedforward control law is physically *** results demonstrate the effectiveness of the optimal control law.

关键词： time-delays discrete-time systems disturbances optimal control high-gain observer

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Adaptive Fuzzy Synchronization for a Class of Uncertain Chaotic Systems Having Triangular Structure Based on high-gain observer

Adaptive Fuzzy Synchronization for a Class of Uncertain Chao...

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第30届中国控制与决策会议

作者： Hongqi Zhu Quanbao Ji Heng Liu Department of Applied Mathematics Huainan Normal University College of Mathematics and Information Science Shaanxi Normal University

This paper addresses the synchronization problem of a class of uncertain chaotic systems with triangular structure based on adaptive high-gain *** states of the master chaotic system are not available for *** on the Lyapunov stability criterion,an observer is designed to estimate the states of the master *** logic systems are used to estimate the unknown nonlinear functions online,and a fuzzy high-gain based observer is *** on the backstepping approach,an adaptive fuzzy controller is designed *** simulation studies are given to confirm our synchronization method.

关键词： high-gain observer chaos synchronization Adaptive fuzzy control

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An Improved Equivalent-Input-Disturbance Approach for Disturbance-Rejection Using high-gain observer

An Improved Equivalent-Input-Disturbance Approach for Distur...

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第37届中国控制会议

作者： Youwu Du Weihua Cao Jinhua She Mingxing Fang Zibao Lu School of Automation China University of Geosciences College of Physics and Electronic Information Anhui Normal University Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems School of Engineering Tokyo University of Technology

An improved equivalent-input-disturbance(EID) approach is presented in this paper to promote the transient performance of disturbance rejection in the control system. A high-gain observer(HGO) is introduced to the conventional EID method to accelerate the convergence of state error. This makes the estimated disturbance tracking the exogenous disturbance more quickly and more precisely. First, the configuration of an improved EID-based control system is described. Then, a sufficient stability condition is derived in terms of a linear matrix inequality(LMI). The resulting LMI is used to find the gains of state observer and state feedback controller. Finally, the validity of the devised method and its superiority over a conventional EID method is demonstrated through the simulation of a numerical example.

关键词： Disturbance rejection disturbance estimation equivalent input disturbance(EID) high-gain observer linear matrix inequality(LMI)

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Ultimate stability analysis of active disturbance rejection control with a high-gain observer

Ultimate stability analysis of active disturbance rejection ...

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第三十九届中国控制会议

作者： Yongshuai Wang Zengqiang Chen Mingwei Sun Qinglin Sun College of Artificial Intelligence Nankai University Key Laboratory of Intelligent Robotics of Tianjin

Model uncertainty is an important issue that must be considered when designing or analyzing controllers. So focusing on a class of nonlinear systems with model uncertainties, this paper analyzed the tracking performance of the active disturbance rejection controller with a high-gain observer, through transforming the model uncertainties into the error form, and the closedloop system was proved to be ultimately bounded using Lyapunov function and Gronwall-Bellman inequality. Finally, numerical simulations demonstrate the results.

关键词： Active Disturbance Rejection Control(ADRC) Ultimate Stability Gronwall-Bellman Inequality Nonlinear Uncertain Systems high-gain observer

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Design of high-gain-observer-Based State Feedback Controller for Positive Time-Delay System

Design of High-Gain-Observer-Based State Feedback Controller...

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第37届中国控制会议

作者： Mingyuan Xie Jinhua She Zhentao Liu School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems School of Engineering Tokyo University of Technology

This paper investigates the stabinzability of positive time-deray system,The nonnegative constraint makes the design of a control law different from a general ***,a method to calculate the L gain of a positive time-delay system is ***,the design of a state feedback controller and a high-gain observer is presented by taking full advantage of the characteristics of the positiveness of the ***,the observer and feedback controller are combined to stabilize the system and improve dynamic performance.A numerical example illustrates the provided method is effective.

关键词： Positive system Delay L1 gain Asymptotically stable high-gain observer observer-based feedback controller

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high-gain-observer-Based Funnel Control for Motor Servo System with Quantized Input

High-Gain-Observer-Based Funnel Control for Motor Servo Syst...

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第三十九届中国控制会议

作者： Yun Cheng Xuemei Ren School of Automation Beijing Institute of Technology

For improving the tracking performance of the general motor servo systems with quantized control input, a new quantized funnel control strategy is proposed. A funnel error variable is introduced to prescribe the evolution of the tracking error, such that the transient behavior and asymptotic convergence of the tracking error will be guaranteed. This strategy removes the complex error transformation in prescribed performance control. In addition to, a high-gain observer is used to estimate the unknown system states, and the quantization error is compensated. Then, the stability of the feedback control system is proved by the Lyapunov theory. Additional simulations illustrate the effectiveness of the quantized control method.

关键词： Motor servo systems quantized control input funnel control high-gain observer tracking control

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observer‑Based Resilient Control of CACC Vehicle Platoon Against DoS Attack

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Automotive Innovation 2023年第2期6卷 176-189页

作者： Xiao Tan Bin Liu Jingzhao Chen Zheng Jiang Engineering Research Center for Metallurgical Automation and Measurement Technology Ministry of EducationWuhan University of Science and TechnologyWuhan 430081China School of Information Science and Engineering Wuhan University of Science and TechnologyWuhan 430081China

Cooperative adaptive cruise control(CACC)is an important technology for improving road utilization and energy efficiency in the automotive *** CACC systems,connected vehicles can receive information from adjacent ones through com-munication ***,the networks are vulnerable to cyber-attacks,so the states of vehicles cannot be received promptly and *** paper studies the security resilience control for a CACC system subject to denial of service(DoS)*** core of the proposed resilient control strategy is to estimate the delay caused by DoS attack and then compensate for it in the ***,a CACC system is modeled by considering the impacts of DoS attack on the transmitted ***,a high-gain observer is presented to estimate the vehicle states including the time *** conver-gence of the observer is proved in a theorem based on the Lyapunov stability theory,and the high-gain-velocity observer is modified so that the estimation error of the velocity can converge to zero in a finite time.A resilient controller is designed by proposing a time delay compensation algorithm to mitigate the impacts of DoS *** effectiveness of the estimation and control methods is illustrated by a ten-vehicle simulation system operating at the FTP75 driving cycle *** the relative estimation errors are less than 6%.

关键词： Connected vehicle Resilient control DoS attack high-gain observer Time delay compensation

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Robust Centralized Fault Detection observer Design for Three-Motor Web-Winding Systems 36

Robust Centralized Fault Detection Observer Design for Three...

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第36届中国控制会议

作者： Xiaoyan Chu Xiaohong Nian Haibo Wang Hailiang Hou School of Information Science and Engineering Central South University School of Information Hunan University of HumanitiesScience and Technology

ISBN: (纸本)9781538629185

In this paper, a robust centralized fault detection observer is proposed for a three-motor web-winding system. First, the original system model is transformed into a canonical form. Then, based on coordinate change and high-gain observer theory, a centralized observer is designed to estimate the system states, and the relevant sufficient condition for existence of the centralized observer is derived in terms of the uniform ultimate boundedness（UUB） theorem. Finally, simulation results illustrate the effectiveness of the designed observer.

关键词： web-winding system fault detection observer high-gain observer

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Spiking-free HGO-based DSC for flexible joint manipulator

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Chinese Journal of Aeronautics 2022年第3期35卷 419-431页

作者： Dezhi KONG Wendong WANG Yang WANG Junbo ZHANG Yikai SHI Lingyun KONG School of Mechanical Engineering Northwestern Polytechnical University Xi'an 710072China Shaanxi Engineering Research Center of Controllable Neutron Source School of ScienceXijing UniversityXi'an 710123China

The tracking control problem for Flexible Joint Manipulator Control System(FJMCS)with unmeasurable states is addressed in this ***,a high-gain observer(HGO)is constructed to estimate the unmeasurable states and the ***,a Dynamic Surface Control(DSC)scheme is developed by using the estimation of *** newly proposed controller has two advantages over the existing methods:(A)a novel Spike Suppression Function(SSF)is developed to avoid the estimation spike problem in the existing HGO-based controllers.(B)Unlike the existing observer-based partial feedback control scheme that can only estimate the unmeasurable states,the proposed HGO can estimate both the unmeasurable states and *** closed-loop system stability is proved by the Lyapunov *** results demonstrate the effectiveness of the proposed controller.

关键词： Dynamic surface control Flexible joint manipulator high-gain observer Mismatched uncertainties Partial states feedback Spike suppression

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