The Experts below are selected from a list of 7548 Experts worldwide ranked by ideXlab platform
Hongjiu Yang - One of the best experts on this subject based on the ideXlab platform.
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Finite-time tracking control for pneumatic servo system via Extended State Observer
IET Control Theory & Applications, 2017Co-Authors: Ling Zhao, Bin Zhang, Hongjiu Yang, Yingjie WangAbstract:In this study, a non-singular fast terminal sliding mode finite-time tracking control strategy is presented to improve response rapidity and control precision of a pneumatic servo system via an Extended State Observer. The Extended State Observer is designed to estimate total disturbances of the system. Moreover, the proposed controller is established to ensure good performances of the closed-loop system. In addition, both sufficiently small observation error and stabilisation of the closed-loop system are proved in finite time. Finally, experimental results show the effectiveness of the proposed method.
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Adaptive control for attitude synchronisation of spacecraft formation via Extended State Observer
IET Control Theory & Applications, 2014Co-Authors: Hongjiu Yang, Xiu You, Yuanqing XiaAbstract:This study studies the problem of synchronisation control for spacecraft formation via Extended State Observer approach over directed communication topology. The attitude kinematics and dynamics of spacecraft are described by Lagrangian formulations, and the decentralised controller is designed with time-varying external disturbances and unmeasurable velocity information. In particular, the estimation of disturbances obtained via Extended State Observer is used for the decentralised controller design. A novel Lyapunov function is proposed to show that both static regulation and dynamic synchronisation are realised. Finally, simulation results are given to demonstrate the effectiveness of the controllers proposed in this study.
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Composite nonlinear Extended State Observer and its application to unmanned ground vehicles
Control Engineering Practice, 1Co-Authors: Haoyu Wang, Zhiqiang Zuo, Yijing Wang, Hongjiu Yang, Shaoping ChangAbstract:Abstract In this paper, a disturbance-Observer-based control strategy is proposed for longitudinal control and lateral control of unmanned ground vehicles. A composite nonlinear Extended State Observer is put forward to estimate the total disturbance. A longitudinal dead-zone model is developed with actual constraints and rapidity requirements for unmanned ground vehicles. The disturbance-Observer-based feedback controller is presented to improve the robustness of the closed-loop system by incorporating the composite nonlinear Extended State Observer. Numerical and experimental results are given to verify the effectiveness of the proposed control strategy.
Christopher M. Kellett - One of the best experts on this subject based on the ideXlab platform.
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Adaptive Semiglobal Nonlinear Output Regulation: An Extended-State Observer Approach
IEEE Transactions on Automatic Control, 2020Co-Authors: Lei Wang, Christopher M. KellettAbstract:This note proposes a new Extended-State Observer-based framework for an adaptive nonlinear regulator design of a class of nonlinear systems, in the general nonequilibrium theory. By augmenting an adaptive Extended-State Observer with an internal model, one is able to obtain an estimate of the term containing uncertain parameters, which then makes it possible to design an adaptive internal model in the presence of a general nonlinearly parameterized immersion condition.
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Adaptive Semiglobal Nonlinear Output Regulation:An Extended-State Observer Approach
arXiv: Systems and Control, 2019Co-Authors: Lei Wang, Christopher M. KellettAbstract:This paper proposes a new Extended-State Observer-based framework for adaptive nonlinear regulator design of a class of nonlinear systems, in the general nonequilibrium theory. By augmenting an Extended-State Observer with an internal model, one is able to obtain an estimate of the term containing uncertain parameters, which then makes it possible to design an adaptive internal model in the presence of a general nonlinearly parameterized immersion condition.
Yuanqing Xia - One of the best experts on this subject based on the ideXlab platform.
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Adaptive control for attitude synchronisation of spacecraft formation via Extended State Observer
IET Control Theory & Applications, 2014Co-Authors: Hongjiu Yang, Xiu You, Yuanqing XiaAbstract:This study studies the problem of synchronisation control for spacecraft formation via Extended State Observer approach over directed communication topology. The attitude kinematics and dynamics of spacecraft are described by Lagrangian formulations, and the decentralised controller is designed with time-varying external disturbances and unmeasurable velocity information. In particular, the estimation of disturbances obtained via Extended State Observer is used for the decentralised controller design. A novel Lyapunov function is proposed to show that both static regulation and dynamic synchronisation are realised. Finally, simulation results are given to demonstrate the effectiveness of the controllers proposed in this study.
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Missile Guidance Law Based on Extended State Observer
IEEE Transactions on Industrial Electronics, 2013Co-Authors: Zheng Zhu, Jingmeng Liu, Yuanqing XiaAbstract:The problem of missile interception is investigated in this paper. Sliding-mode controllers with finite-time convergence are proposed for the design of guidance laws. In particular, the control design consists of the estimation of the target acceleration by the Extended State Observer (ESO), and thus, it achieves the decrease of undesired chattering effectively. Also, simulation results are presented to illustrate the effectiveness of the control strategies.
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Attitude tracking of rigid spacecraft based on Extended State Observer
2010 3rd International Symposium on Systems and Control in Aeronautics and Astronautics, 2010Co-Authors: Zheng Zhu, Yuanqing Xia, Shuo WangAbstract:The problem of attitude control for a spacecraft model which is nonlinear in dynamics with inertia uncertainty and external disturbance is investigated in this paper. The Extended State Observer is applied to estimate the disturbance, by which a sliding mode controller is designed to force the State variables of the closed loop system to converge to the reference attitude States. Also, simulation results are presented to illustrate the effectiveness of the control strategy.
Yuan Huang - One of the best experts on this subject based on the ideXlab platform.
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Toward Event-Triggered Extended State Observer
IEEE Transactions on Automatic Control, 2018Co-Authors: Yuan Huang, Junzheng Wang, Dawei Shi, Ling ShiAbstract:In this note, we consider event-triggered Extended State Observer (ET-ESO) design for a continuous-time nonlinear system with uncertainty and disturbance. Since the convergence of the ET-ESO depends on the design of the triggering condition directly, the goal is to design a realizable triggering condition not relying on the State of the plant. For the Extended State Observer considered, an event-triggered transmission strategy is proposed such that the observation error is uniformly bounded. Furthermore, under mild conditions, the observation error can be guaranteed to be bounded at any time. It is shown that there is no Zeno behavior for the event-based transmission strategy. The obtained theoretical results are validated through numerical simulations.
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on stability of sampled data Extended State Observer for networked systems
Asian Control Conference, 2017Co-Authors: Yuan Huang, Junzheng Wang, Dawei Shi, Jian XueAbstract:The problem of sampled-data State observation is considered in this work. A nonlinear continuous-time system with internal uncertainty and external disturbance is introduced, for which the sampled-data observation problem based on an Extended State Observer is formulated. We first introduce the framework of the observed system, in which the output measurement is sampled and transmitted to Extended State Observer periodically. Then based on this framework, the observation performance of the sampled-data Extended State Observer (SD-ESO) is investigated. For the Observer considered, the uniformly ultimately bounded property has been guaranteed. Furthermore, a co-design method for the sample interval and high gain parameter of SD-ESO is provided to achieve the desired observation performance. The obtained theoretic results are validated through the numerical simulations.
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ASCC - On stability of sampled-data Extended State Observer for networked systems
2017 11th Asian Control Conference (ASCC), 2017Co-Authors: Yuan Huang, Junzheng Wang, Dawei Shi, Jian XueAbstract:The problem of sampled-data State observation is considered in this work. A nonlinear continuous-time system with internal uncertainty and external disturbance is introduced, for which the sampled-data observation problem based on an Extended State Observer is formulated. We first introduce the framework of the observed system, in which the output measurement is sampled and transmitted to Extended State Observer periodically. Then based on this framework, the observation performance of the sampled-data Extended State Observer (SD-ESO) is investigated. For the Observer considered, the uniformly ultimately bounded property has been guaranteed. Furthermore, a co-design method for the sample interval and high gain parameter of SD-ESO is provided to achieve the desired observation performance. The obtained theoretic results are validated through the numerical simulations.
Lei Wang - One of the best experts on this subject based on the ideXlab platform.
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Adaptive Semiglobal Nonlinear Output Regulation: An Extended-State Observer Approach
IEEE Transactions on Automatic Control, 2020Co-Authors: Lei Wang, Christopher M. KellettAbstract:This note proposes a new Extended-State Observer-based framework for an adaptive nonlinear regulator design of a class of nonlinear systems, in the general nonequilibrium theory. By augmenting an adaptive Extended-State Observer with an internal model, one is able to obtain an estimate of the term containing uncertain parameters, which then makes it possible to design an adaptive internal model in the presence of a general nonlinearly parameterized immersion condition.
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Adaptive Semiglobal Nonlinear Output Regulation:An Extended-State Observer Approach
arXiv: Systems and Control, 2019Co-Authors: Lei Wang, Christopher M. KellettAbstract:This paper proposes a new Extended-State Observer-based framework for adaptive nonlinear regulator design of a class of nonlinear systems, in the general nonequilibrium theory. By augmenting an Extended-State Observer with an internal model, one is able to obtain an estimate of the term containing uncertain parameters, which then makes it possible to design an adaptive internal model in the presence of a general nonlinearly parameterized immersion condition.
