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Distributed adaptive control for high-order stochastic nonlinear systems with unknown control gains and uncertainties

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Journal of control and Decision 2023年第4期10卷 484-493页

作者： Baoyu Wen Jiangshuai Huang Shaoxin Sun Xingyue Sheng Xiaowen Yue Chongqing Engineering Laboratory of Robotics for Traffic Engineering Chongqing Jiaotong UniversityChongqingPeople’s Republic of China School of Automation Chongqing UniversityChongqingPeople’s Republic of China Chongqing Zhixiang Paving Technology Engineering Co. Ltd.ChongqingPeople’s Republic of China

The leader-following tracking consensus problem of a class of high-order stochastic nonlinearmulti-agent systems with unknown control gains and unknown system parameters is solved inthis paper. For a class of high-orderstochastic nonlinear multi-agentsystemsin parametric strictfeedback, the distributed control scheme is designed by using backstepping technology. Theadaptive control method is used to deal with the unknown control gains and unknown systemparameters. Besides, to save communication resources, the event-trigged control is applied. Thecontrol algorithms ensure that allstatesin the closed-loop system and tracking errors are globallybounded stable in probability. Two simulation examples verify the effectiveness of the designedalgorithms.

关键词： adaptive control nonlinear stochastic systems leader-following consensus control

An Integrated Observer Framework Based Mechanical Parameters Identification for adaptive control of Permanent Magnet Synchronous Motor

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Complex System Modeling and Simulation 2022年第4期2卷 354-367页

作者： Zhong Liao Zhaohua Liu Lei Chen Mingyang Lyu Dian Wang Faming Wu Zhengheng Wang Hualiang Wei the School of Information and Electrical Engineering Hunan University of Science and TechnologyXiangtan 411201China the Wind Power Business Division CRRC Zhuzhou Institute Co.Ltd.Zhuzhou 412001China. the Department of Automatic control and Systems Engineering University of SheffieldSheffieldS13JDUK.

An integrated observer framework based mechanical parameters identification approach for adaptive control of permanent magnet synchronous motors is proposed in this ***,an integrated observer framework is established for mechanical parameters’estimation,which consists of an extended sliding mode observer(ESMO)and a Luenberger *** at minimizing the influence of parameters coupling,the viscous friction and the moment of inertia are obtained by ESMO and the load torque is identified by Luenberger observer *** obtaining estimates of the mechanical parameters,the optimal proportional integral(PI)parameters of the speed-loop are determined according to third-order best design *** a result,the controller can adjust the PI parameters in real time according to the parameter changes to realize the adaptive control of the ***,the disturbance is compensated according to the ***,the experiments were carried out on simulation platform,and the experimental results validated the reliability of parameter identification and the efficiency of the adaptive control strategy presented in this paper.

关键词： parameter identification permanent magnet synchronous motor adaptive control extended sliding mode observer Luenberger observer

adaptive control for a class of discrete-time time-delay systems with regard to delay parameter

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Journal of Systems Engineering and Electronics 2009年第1期20卷 159-167页

作者： Chai Lin Cheng Ming Fei Shumin Zhai Junyong Key Laboratory of Measurement and control of Complex Systems of Engineering Ministry of Education School of Automation Southeast Univ. Nanjing 210096 P. R. China School of eleetrics Southeast Univ. Nanjing 210096 P. R. China

The memory state feedback control problem for a class of discrete-time systems with input delay and unknown state delay is addressed based on LMIs and Lyapunov-Krasovskii functional method. Under the action of our designed adaptive control law, the unknown time-delay parameter is included in memory state feedback controller. Using LMI technique, delay-dependent sufficient conditions for the existence of the feedback controller are obtained. Finally, the effectiveness of the proposed design method is demonstrated by a numerical example.

关键词： discrete-time time-delay systems adaptive control linear matrix inequality.

adaptive control method for nonlinear time-delay processes

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Journal of Systems Engineering and Electronics 2007年第3期18卷 566-576页

作者： Chen Zonghai Zhang Haitao Li Ming Xiang Wei Dept of Automation Univ of Science and Technology of China Hefei 230027 P R China

Two complex properties, varying time-delay and block-oriented nonlinearity, are very common in chemical engineering processes and not easy to be controlled by routine control methods. Aimed at these two complex properties, a novel adaptive control algorithm the basis of nonlinear OFS （orthonormal functional series） model is proposed. First, the hybrid model which combines OFS and Volterra series is introduced. Then, a stable state feedback strategy is used to construct a nonlinear adaptive control algorithm that can guarantee the closed-loop stability and can track the set point curve without steady-state errors. Finally, control simulations and experiments on a nonlinear process with varying time-delay are presented. A number of experimental results validate the efficiency and superiority of this algorithm.

关键词： adaptive control block-oriented nonlinearity varying time-delay OFS Volterra Series,

adaptive control with saturation-constrainted observations for drag-free satellites——a set-valued identification approach

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Science China(Information Sciences) 2021年第10期64卷 182-193页

作者： Shuping TAN Jin GUO Yanlong ZHAO Jifeng ZHANG Science and Technology on Space Intelligent control Laboratory Beijing Institute of Control Engineering School of Automation and Electrical Engineering University of Science and Technology Beijing Key Laboratory of Systems and control Academy of Mathematics and Systems ScienceChinese Academy of Sciences

The high-accuracy drag-free control is one of the key technologies for gravity gradient *** the range of the gravity gradiometer is limited, the measurement is subject to the saturation *** paper introduces a design method of the adaptive drag-free control law by employing the set-valued identification approach. By inserting several thresholds in the constrained interval, the output observation is transformed into the set-valued information under different thresholds, based on which and the weighted optimization technique the identification algorithm for the unknown parameter is constructed. The adaptive drag-free control law is designed via the certainty equivalence principle. It is shown that the identification algorithm is strongly convergent and the convergence rate of the estimation error is obtained. The performance of the closed-loop system is analyzed, and the asymptotic optimality of the adaptive controller is proved. The numerical simulation is included to verify the effectiveness of the main results.

关键词： drag-free satellite saturation constraint adaptive control set-valued identification

adaptive control for autonomous rendezvous of spacecraft on elliptical orbit

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Acta Mechanica Sinica 2009年第4期25卷 539-545页

作者： Shan Lu Shijie Xu School of Astronautics, Beihang University,100191 Beijing, China School of Astronautics Beihang University Beijing China

A strategy for spacecraft autonomous rendezvous on an elliptical orbit in situation of no orbit information is developed. Lawden equation is used to describe relative motion of two spacecraft. Then an adaptive gain factor is introduced, and an adaptive control law for auton- omous rendezvous on the elliptical orbit is designed using Lyapunov approach. The relative motion is proved to be ultimately bounded under this control law, and the final relative position error can achieve the expected magnitude. Simulation results indicate that the adaptive control law can realize autonomous rendezvous on the elliptical orbit with relative state information only.

关键词： Autonomous rendezvous Elliptical orbit Lyapunov approach adaptive control Gain factor

adaptive control of Helicopter Ground Resonance with Magnetorheological Damper

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Chinese Journal of Aeronautics 2007年第6期20卷 501-510页

作者： Wang Wei Xia Pinqi College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

The methodology for adaptive control of helicopter ground resonance with magnetorheological （MR） damper is presented. The adaptive inverse control method is used to control the output damping force of MR damper and the range of the damping force is given. Through the adaptive inverse control, the damping force of MR damper is fit to a desired damping force. With the background of applying MR damper to control of helicopter ground resonance, a model of loss force and an adaptive arithmetic for stabilization of the coupled rotor/fuselage system are presented. The simulation shows that the controller presented in this paper can stabilize the rotor/fuselage coupling system quickly and control the helicopter ground resonance effectively.

关键词： ground resonance adaptive control magnetorheological damper

adaptive control of bifurcation and chaos in a time-delayed system

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Chinese Physics B 2013年第3期22卷 245-255页

作者：李宁袁惠群孙海义张庆灵 Institute of Systems Science Northeastern University Institute of Applied Mechanics Northeastern University College of Science Shenyang JianZhu University

In this paper,the stabilization of a continuous time-delayed system is *** control the bifurcation and chaos in a time-delayed system,a parameter perturbation control and a hybrid control are ***,to ensure the asymptotic stability of the system in the presence of unexpected system parameter changes,the adaptive control idea is introduced,i.e.,the perturbation control parameter and the hybrid control parameter are automatically tuned according to the adaptation laws,*** adaptation algorithms are constructed based on the Lyapunov-Krasovskii stability *** adaptive parameter perturbation control and the adaptive hybrid control methods improve the corresponding constant control *** have the advantages of increased stability,adaptability to the changes of the system parameters,control cost saving,and *** simulations for a well-known chaotic time-delayed system are performed to demonstrate the feasibility and superiority of the proposed control methods.A comparison of the two adaptive control methods is also made in an experimental study.

关键词： delay parameter perturbation control hybrid control adaptive control

adaptive control of a class of nonlinear time-varying systems with multiple models

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control Theory and Technology 2016年第4期14卷 323-334页

作者： Koshy GEORGE Karpagavalli SUBRAMANIAN PES Centre for Intelligent Systems Department of Telecommunication Engineering PES Institute of Technology Bangalore India PES Centre for Intelligent Systems Department of Electronics and Communication Engineering PES University Bangalore India

The adaptive control of nonlinear systems that are linear in the unknown but time-varying parameters are treated in this paper. Since satisfactory transient performance is an important factor, multiple models are required as these parameters change abruptly in the parameter space. In this paper we consider both the multiple models with switching and tuning methodology as well as multiple models with second level adaptation for this class of systems. We demonstrate that the latter approach is better than the former.

关键词： Nonlinear time-varying systems adaptive control multiple models