This paper describes a systematic procedure to design robust adaptive controllers for a class of nonlinear systems with unknown functions of unknown bounds based on backstepping and sliding mode techniques. These unknown functions can be unmodeled system nonlinearities, uncertainties and disturbances with unknown bounds. Both state feedback and output feedback designs are addressed. In the design procedure, the upper bounds of the unknown functions are estimated using an adaptation strategy, and the estimates are used to design stabilizing functions and control inputs based on the backstepping design methodology. The proposed controllers guarantee that the tracking errors converge to a residual set close to zero exponentially for both state feedback and output feedback designs, while maintaining the boundedness of all other variables.
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e-mail: donghun@bu.edu
e-mail: wangh@bu.edu
e-mail: hwyang@hanyang.ac.kr
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March 2004
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Robust Adaptive Control of Nonlinear Output Feedback Systems Under Disturbances With Unknown Bounds
Dong H. Kim,
e-mail: donghun@bu.edu
Dong H. Kim
Department of Aerospace and Mechanical Engineering, Boston University, Boston, MA 02215, USA
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Hua O. Wang,
e-mail: wangh@bu.edu
Hua O. Wang
Department of Aerospace and Mechanical Engineering, Boston University, Boston, MA 02215, USA
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Hai-Won Yang
e-mail: hwyang@hanyang.ac.kr
Hai-Won Yang
School of Electrical Engineering and Computer Science, Hanyang University, Ansan, Kyunggi do, Korea, 426-791
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Dong H. Kim
Department of Aerospace and Mechanical Engineering, Boston University, Boston, MA 02215, USA
e-mail: donghun@bu.edu
Hua O. Wang
Department of Aerospace and Mechanical Engineering, Boston University, Boston, MA 02215, USA
e-mail: wangh@bu.edu
Hai-Won Yang
School of Electrical Engineering and Computer Science, Hanyang University, Ansan, Kyunggi do, Korea, 426-791
e-mail: hwyang@hanyang.ac.kr
Contributed by the Dynamic Systems, Measurement, and Control Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the ASME Dynamic Systems and Control Division ; final revision, July 28, 2003; Associate Editor: A. Alleyne.
J. Dyn. Sys., Meas., Control. Mar 2004, 126(1): 229-235 (7 pages)
Published Online: April 12, 2004
Article history
Revised:
July 28, 2003
Online:
April 12, 2004
Citation
Kim , D. H., Wang, H. O., and Yang, H. (April 12, 2004). "Robust Adaptive Control of Nonlinear Output Feedback Systems Under Disturbances With Unknown Bounds ." ASME. J. Dyn. Sys., Meas., Control. March 2004; 126(1): 229–235. https://doi.org/10.1115/1.1651534
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