DOI: 10.3724/SP.J.1004.2008.00984

Acta Automatica Sinica (自动化学报) 2008/34:8 PP.984-988

Adaptive Practical Output Tracking Control for High-order Nonlinear Uncertain Systems

The problem of adaptive practical output tracking control is studied for a class of high-order nonlinear uncertain systems, which has been investigated under the assumption that the lower bounds of the unknown control coefficients are exactly known. Based on the idea of the new robust adaptive control and the continuous stabilization, this assumption is successfully removed. By means of adding a power integrator, a systematic approach is developed to construct a continuous adaptive practical output tracking controller, which guarantees that all the states of the closed-loop system are globally stable, while the tracking error can be bounded by any given positive number after a finite time. Finally, a simulation example is given to illustrate the correctness of the theoretical results.

Key words:Adding a power integrator, unknown control coefficients,practical output tracking, adaptive control

ReleaseDate:2014-07-21 14:25:48

Funds:Supported by National Natural Science Foundation of China (60674036), the Science and Technique Development Plan of Shandong Province of China (2004GG4204014), the Program for New Century Excellent Talents in University of China (NCET-07-0513), the Key Science and Technique Foundation of Ministry of Education of China (108079), and the Excellent Young and Middle-Aged Scientist Award Grant of Shandong Province of China (2007BS01010)

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