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Zbl 1119.93061
Sun, Zongyao; Liu, Yungang
Adaptive state-feedback stabilization for a class of high-order nonlinear uncertain systems. (English)
[J] Automatica 43, No. 10, 1772-1783 (2007). ISSN 0005-1098

Summary: For high-order nonlinear uncertain systems, there have been a lot of investigations under a strong assumption that the lower bounds of the unknown control coefficients should be exactly known. In this paper, this assumption is removed and a unified approach is developed to systematically construct a state-feedback adaptive stabilizing control law for a class of high-order nonlinear uncertain systems with unknown control coefficients. By using the method of the so-called adding a power integrator merging with adaptive technique, a recursive design procedure is provided to achieve a smooth adaptive state-feedback control law, which guarantees that the closed-loop system is globally uniformly stable while the original system states globally asymptotically converge to zero. Finally, a simulation example is given to illustrate the correctness of the theoretical results.

MSC 2000:: *93D21 Adaptive and robust stabilization
93C10 Nonlinear control systems
93C15 Control systems governed by ODE
93C40 Adaptive control systems

Keywords: Nonlinear systems; unknown control coefficients; adaptive control; adding; power integrator

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