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Global Practical Tracking by Output-Feedback forNonlinear Systems with Unknown Growth Rate and Time-delay
Xuehua Yan 1, Xinmin Song 2
1.School of Electrical Engineering, University of Jinan, Jinan 250022
2.School of Information Science and Engineering, Shandong Normal University, Jinan 250014
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Funding: Specialized Research Fund for theDoctoral Program of Higher Education （No.20113704120005）
Opened online:22 May 2014
Accepted by: none
Citation: Xuehua Yan, Xinmin Song.Global Practical Tracking by Output-Feedback forNonlinear Systems with Unknown Growth Rate and Time-delay[OL]. [22 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4597352
 
 
This paperconsiders the global practical tracking problem by output-feedback fora class of uncertain nonlinear systems with not only unmeasured states dependent growthbut also time-varying time delay.Compared with the closely related works, the remarkableness of the paper is that thetime-varying time delay and unmeasurable states are permitted in the system nonlinear growth. Motivated by therelated tracking results, and flexibly using the ideas and techniques of universal control anddead zone, an adaptive output-feedbacktracking controller is explicitly designed with the help of a new Lyapunov-Krasoviskii functional, to makethe tracking error prescribed arbitrarily small after a finite time while keep all the closed-loopsignals bounded.
Keywords:Control theory and control engineering; Nonlinear time delay systems;Global practical tracking; Adaptive control;Output-feedback; Dynamic high-gain.
 
 
 

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