Browsing by Author "Sun, Zong-Yao"

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Almost Disturbance Decoupling for a Class of Nonlinear Systems Subject to Time-Delays Via Sampled-Data Output Feedback Control
(2018-01-01)
Meng, Qinghua
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Wang, Pan
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Sun, Zong-Yao
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Chen, Chih-Chiang
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電控工程研究所
This paper considers the problem of almost disturbance decoupling (ADD) via sampled-data output feedback control for a class of uncertain nonlinear systems subject to time-delays. Based on output feedback domination approach, a sampled-data output feedback controller is designed to globally stabilize the system under a lower-triangular linear growth condition. Gronwall-Bellman-like inequality and inductive method are introduced to estimate the state growth in the presence of time-delays, uncertain nonlinearities and unknown disturbances. The proposed controller can attenuate the influence of disturbances on the output to an arbitrary degree in the L-2 gain sense. Finally, simulation results show the effectiveness of the control method.
Global Output Feedback Stabilization of a Class of Nonlinear Systems With Unknown Measurement Sensitivity
(2018-07-01)
Chen, Chih-Chiang
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Qian, Chunjiang
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Sun, Zong-Yao
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Liang, Yew-Wen
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電控工程研究所
This note investigates the problem of global output feedback stabilization for a class of nonlinear systems with unknown measurement sensitivity. A new design method, namely dual-domination approach, is proposed to explicitly construct a state observer as well as an output feedback control law, which globally asymptotically stabilizes the nonlinear systems. The novelty of this note owes to a distinct perspective in coping with unknown measurement sensitivity which has previously been a hurdle to solve the global output feedback stabilization problem of the nonlinear systems.
Smooth output feedback stabilization for a class of nonlinear systems with time-varying powers
(2017-12-01)
Chen, Chih-Chiang
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Qian, Chunjiang
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Lin, Xiangze
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Sun, Zong-Yao
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Liang, Yew-Wen
This paper investigates the global asymptotic stabilization problem for a class of nonlinear systems with time-varying powers. First, adding a power integrator technique is revamped to design a smooth state feedback controller, which is implementable with only upper and lower bounds of the time-varying powers. When the system state is not fully available and the time-varying power is exactly known, a smooth output feedback controller constituted by a state feedback and a nonlinear state observer is constructed to globally stabilize the system. Copyright (c) 2017 John Wiley & Sons, Ltd.