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Sliding mode control for a class of uncertain nonlinear system based on disturbance observer
Author(s) -
Chen Mou,
Chen WenHua
Publication year - 2010
Publication title -
international journal of adaptive control and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 66
eISSN - 1099-1115
pISSN - 0890-6327
DOI - 10.1002/acs.1110
Subject(s) - control theory (sociology) , disturbance (geology) , nonlinear system , sliding mode control , observer (physics) , lyapunov function , stability (learning theory) , mode (computer interface) , computer science , engineering , mathematics , control engineering , control (management) , artificial intelligence , physics , paleontology , operating system , quantum mechanics , machine learning , biology
In this paper, a sliding mode control (SMC) scheme is proposed for a class of nonlinear systems based on disturbance observers. For a nonlinear system, the disturbance that cannot be directly measured is estimated using a nonlinear disturbance observer. By choosing an appropriate nonlinear gain function, the disturbance observer can well approximate the unknown disturbance. Based on the output of the disturbance observer, an SMC scheme is presented for the nonlinear system, and the stability of the closed‐loop system is established using Lyapunov method. Finally, two simulation examples are presented to illustrate the features and the effectiveness of the proposed disturbance‐observer‐based SMC scheme. Copyright © 2009 John Wiley & Sons, Ltd.