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《Journal of Vibration and Shock》 2009-03
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Load identification based on precise time-step integration for Markov parameters

GUO Xing-lin1,MAO Yu-ming1,ZHAO Yan1,ZHU Li-wen2,PAN Zhong-wen2(1.State Key Laboratory of Structural Analysis for Industry Equipment,Dalian University of Technology,Dalian116023,China;2.Beijing Institute of Aerospace Systems Engineering,Beijing 100076,China)  
In many practical situations,it is difficult to perform direct measurements or calculations of external multi-force acting on vibrating structures.A multi-force identification method which could commendably reconstruct spatially distributed multi-force using limited measurement points was presented here.This method constituted a discrete dynamic moving average model in state space and further adopted 2N algorithm to precisely compute Markov parameter matrix in the identification model.A regularization technique based on truncated singular value decomposition method was introduced to seek for a stable and approximate solution for the inverse process in whole time domain.Numerical simulation showed that this method is valid and effective.
【Fund】: 国家自然科学基金资助项目(No.50608012)
【CateGory Index】: TB122
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