An adaptive left-right eigenvector evolution algorithm for vibration isolation control

NCUIR > Research Center > Research Center for adaptive Data analysis > journal & Dissertation > Item 987654321/27709

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27709

Title:	An adaptive left-right eigenvector evolution algorithm for vibration isolation control
Authors:	Wu,TY
Contributors:	數據分析方法研究中心
Keywords:	EIGENSTRUCTURE ASSIGNMENT;OUTPUT-FEEDBACK;LINEAR-SYSTEMS;CONFINEMENT;DESIGN
Date:	2009
Issue Date:	2010-06-29 19:12:21 (UTC+8)
Publisher:	中央大學
Abstract:	The purpose of this research is to investigate the feasibility of utilizing an adaptive left and right eigenvector evolution (ALREE) algorithm for active vibration isolation. As depicted in the previous paper presented by Wu and Wang (2008 Smart Mater. Struct. 17 015048), the structural vibration behavior depends on both the disturbance rejection capability and mode shape distributions, which correspond to the left and right eigenvector distributions of the system, respectively. In this paper, a novel adaptive evolution algorithm is developed for finding the optimal combination of left-right eigenvectors of the vibration isolator, which is an improvement over the simultaneous left-right eigenvector assignment (SLREA) method proposed by Wu and Wang ( 2008 Smart Mater. Struct. 17 015048). The isolation performance index used in the proposed algorithm is defined by combining the orthogonality index of left eigenvectors and the modal energy ratio index of right eigenvectors. Through the proposed ALREE algorithm, both the left and right eigenvectors evolve such that the isolation performance index decreases, and therefore one can find the optimal combination of left-right eigenvectors of the closed-loop system for vibration isolation purposes. The optimal combination of left-right eigenvectors is then synthesized to determine the feedback gain matrix of the closed-loop system. The result of the active isolation control shows that the proposed method can be utilized to improve the vibration isolation performance compared with the previous approaches.
Relation:	SMART MATERIALS & STRUCTURES
Appears in Collections:	[Research Center for adaptive Data analysis ] journal & Dissertation

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