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Title: Fuzzy combination of fuzzy and switching state-feedback controllers for nonlinear systems subject to parameter uncertainties
Authors: Lam, HK
Leung, FHF 
Keywords: Fuzzy combination
Fuzzy-model-based control
Parameter uncertainties
Stability analysis
Issue Date: Apr-2005
Publisher: IEEE
Source: IEEE transactions on systems, man, and cybernetics. Part B, Cybernetics, Apr. 2005, v. 35, no. 2, p. 269-281 How to cite?
Journal: IEEE transactions on systems, man, and cybernetics. Part B, Cybernetics 
Abstract: This paper presents a fuzzy controller, which involves a fuzzy combination of local fuzzy and global switching state-feed-back controllers, for nonlinear systems subject to parameter uncertainties with known bounds. The nonlinear system is represented by a fuzzy combined Takagi-Sugeno-Kang model, which is a fuzzy combination of the global and local fuzzy plant models. By combining the local fuzzy and global switching state-feedback controllers using fuzzy logic techniques, the advantages of both controllers can be retained and the undesirable chattering effect introduced by the global switching state-feedback controller can be eliminated. The steady-state error introduced by the global switching state-feedback controller when a saturation function is used can also be removed. Stability conditions, which are related to the system matrices of the local and global closed-loop systems, are derived to guarantee the closed-loop system stability. An application example will be given to demonstrate the merits of the proposed approach.
ISSN: 1083-4419
DOI: 10.1109/TSMCB.2004.842417
Rights: © 2005 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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