Journal of East China Normal University(Natural Sc ›› 2006, Vol. 2006 ›› Issue (3): 60-65.

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Output Feedback Adaptive Controllers for a Class of Uncertain Nonlinear System Including Delayed Perturbations(Chinese)

XU Jian-qiang1,2 CHEN Shu-zhong1   

  1. 1.Department of Computer Science and Technology, East China Normal University; Shanghai 200062 China; 2.Center of Mathematics and Physics Teaching, Shanghai Institute of Technology, 上海 200233 China
  • Received:2004-04-09 Revised:2004-12-31 Online:2006-05-25 Published:2006-05-25
  • Contact: XU Jian-qiang

Abstract: The problem of output feedback adaptive stabilization for a class of uncertain dynamic system including time varying delayed perturbations was discussed.The uncertainties were assumed to satisfy the so-called matching conditions and the transfer function matrix of the nominal system was strictly feedback positive real.By using of the Lyapunov stability theory and Lyapunov-Krosovskii functional we proposed an output feedback adaptive controller,which guarantees that the closed-loop system is globally stable i the sense of uniform ultimate boundedness. Finally, an illustrative example was given to demonstrate the validity of the results.

Key words: output feedback adaptive stabilization, Lyapunov-Krosovskii functional, uniform ultimate boundedness, time varying delayed perturbations, output feedback adaptive stabilization, Lyapunov-Krosovskii functional, uniform ultimate boundedness

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