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Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/1421

Title: Fuzzy combination of fuzzy and switching state-feedback controllers for nonlinear systems subject to parameter uncertainties
Authors: Lam, H. K.
Leung, Frank H. F.
Subjects: Fuzzy combination
Fuzzy-model-based control
Parameter uncertainties
Stability analysis
Issue Date: Apr-2005
Publisher: IEEE
Citation: IEEE transactions on systems, man, and cybernetics. Part B, Cybernetics, Apr. 2005, v. 35, no. 2, p. 269-281.
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.
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.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/1421
ISSN: 1083-4419
Appears in Collections:EIE Journal/Magazine Articles

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