A NOVEL STABILITY CONDITION AND ITS APPLICATION TO GA-BASED FUZZY CONTROL FOR NONLINEAR SYSTEMS WITH UNCERTAINTY

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26261

Title:	A NOVEL STABILITY CONDITION AND ITS APPLICATION TO GA-BASED FUZZY CONTROL FOR NONLINEAR SYSTEMS WITH UNCERTAINTY
Authors:	Chen,PC;Chen,CW;Chiang,WL;Yeh,K
Contributors:	土木工程研究所
Keywords:	LYAPUNOV METHOD;INTERCONNECTED SYSTEMS;ROBUSTNESS DESIGN;DYNAMIC-SYSTEMS;TIME DELAYS;STABILIZATION;MODELS
Date:	2009
Issue Date:	2010-06-29 17:09:25 (UTC+8)
Publisher:	中央大學
Abstract:	In this study, we strive to combine the advantages of fuzzy logic control (FLC), genetic algorithms (GA), H-infinity tracking control schemes, smooth control and adaptive laws to design an adaptive fuzzy sliding model controller for the rapid and efficient stabilization of complex and nonlinear systems. First, we utilize a reference model and a fuzzy model (both involving FLC rules) to describe and well-approximate an uncertain, nonlinear plant. The FLC rules and the consequent parameter are decided on via GA. A boundary-layer function is introduced into these updated laws to cover modeling errors and to guarantee that the state errors converge into a specified error bound. After this, a H-infinity tracking problem is characterized. We solve an eigenvalue problem (EVP), and derive a modified adaptive neural network controller (MANNC) to simultaneously stabilize and control the system and achieve H-infinity control performance. Furthermore, a stability criterion is derived utilizing Lyapunov's direct method to ensure the stability of the nonlinear system. Finally, the control methodology is demonstrated via a numerical simulation.
Relation:	JOURNAL OF MARINE SCIENCE AND TECHNOLOGY-TAIWAN
Appears in Collections:	[Graduate Institute of Civil Engineering] journal & Dissertation

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