Robust output-feedback finite-time regulator of systems with mismatched uncertainties bounded by positive functions
- Author(s): Shang Shi 1 ; Shengyuan Xu 1 ; Xin Yu 2 ; Junwei Lu 3 ; Weimin Chen 4 ; Zhengqiang Zhang 5
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View affiliations
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Affiliations:
1:
School of Automation , Nanjing University of Science and Technology , Nanjing 210094, Jiangsu , People's Republic of China ;
2: School of Electrical and Information Engineering , Jiangsu University , Zhenjiang 212013, Jiangsu , People's Republic of China ;
3: School of Electrical and Automation Engineering , Nanjing Normal University , 78 Bancang Street, Nanjing 210042, Jiangsu , People's Republic of China ;
4: Department of Applied Mathematics , Nanjing University of Science and Technology , Nanjing 210094, Jiangsu , People's Republic of China ;
5: School of Electrical Engineering and Automation , Qufu Normal University , Rizhao 276826 , People's Republic of China
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Affiliations:
1:
School of Automation , Nanjing University of Science and Technology , Nanjing 210094, Jiangsu , People's Republic of China ;
- Source:
Volume 11, Issue 17,
24
November
2017,
p.
3107 – 3114
DOI: 10.1049/iet-cta.2017.0291 , Print ISSN 1751-8644, Online ISSN 1751-8652
In this study, the authors investigate the problem of finite-time output regulation for a class of mismatched uncertain n-dimensional integrator, in which only the output signal is measurable and the higher derivatives of the matched and mismatched disturbances are bounded by time-varying functions. Based on a finite-time extended state observer, an output feedback controller is constructed. It is shown that even in the presence of mismatched uncertainties, whose high-order derivatives are bounded by positive functions, the output of the system can be regulated to zero in finite time without requiring the knowledge of full-state signals. An application to mass-spring mechanical systems is given to illustrate the effectiveness and attractive properties of the authors' proposed controller.
Inspec keywords: robust control; observers; uncertain systems; time-varying systems; nonlinear control systems; feedback
Other keywords: finite-time extended state observer; output feedback controller; mismatched uncertain n-dimensional integrator; time-varying functions; mass-spring mechanical systems; robust output-feedback finite-time regulator
Subjects: Time-varying control systems; Nonlinear control systems; Stability in control theory; Simulation, modelling and identification
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