Title

A self-tuning fuzzy controller for a class of multi-input multi-output nonlinear systems

Authors

Authors

C. Y. Xu;Y. C. Shin

Comments

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Abbreviated Journal Title

Eng. Appl. Artif. Intell.

Keywords

Fuzzy control; Self-tuning systems; Multi-input multi-output system; Relative gain array; Non-linear systems; CHEMICAL PROCESSES; STABILITY ANALYSIS; DESIGN; Automation & Control Systems; Computer Science, Artificial Intelligence; Engineering, Multidisciplinary; Engineering, Electrical & Electronic

Abstract

This paper presents a systematic design procedure of a multivariable fuzzy controller for a general Multi-Input Multi-Output (MIMO) nonlinear system with an input-output monotonic relationship or a piecewise monotonic relationship for each input-output pair. Firstly, the system is modeled as a Fuzzy Basis Function Network (FBFN) and its Relative Gain Array (RGA) is calculated based on the obtained fuzzy model. The proposed multivariable fuzzy controller is constructed with two orthogonal fuzzy control engines. The horizontal fuzzy control engine for each system input-output pair has a hierarchical structure to update the control parameters online and compensate for unknown system variations. The perpendicular fuzzy control engine is designed based on the system RGA to eliminate the multivariable interaction effect. The resultant closed-loop fuzzy control system is proved to be passive stable as long as the augmented open-loop system is input-output passive. Two sets of simulation examples demonstrate that the proposed fuzzy control strategy can be a promising way in controlling multivariable nonlinear systems with unknown system uncertainties and time-varying parameters. (C) 2010 Elsevier Ltd. All rights reserved.

Journal Title

Engineering Applications of Artificial Intelligence

Volume

24

Issue/Number

2

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

238

Last Page

250

WOS Identifier

WOS:000287066800004

ISSN

0952-1976

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