Identification of Nonlinear Systems Through Time-Frequency Filtering Technique

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	Identification of Nonlinear Systems Through Time-Frequency Filtering Technique
	Wang LL(王丽丽); Zhang JH(张景绘); Wang C(王超); Hu SY
刊名	Journal of Vibration and Acoustics
	2003
卷号	125 期号:2 页码:199-204
ISSN号	1048-9002
通讯作者	Wang, LL (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
中文摘要	In the previous paper, a class of nonlinear system is mapped to a so-called skeleton linear model (SLM) based on the joint time-frequency analysis method. Behavior of the nonlinear system may be indicated quantitatively by the variance of the coefficients of SLM versus its response. Using this model we propose an identification method for nonlinear systems based on nonstationary vibration data in this paper. The key technique in the identification procedure is a time-frequency filtering method by which solution of the SLM is extracted from the response data of the corresponding nonlinear system. Two time-frequency filtering methods are discussed here. One is based on the quadratic time-frequency distribution and its inverse transform, the other is based on the quadratic time-frequency distribution and the wavelet transform. Both numerical examples and an experimental application are given to illustrate the validity of the technique.
学科主题	力学
类目[WOS]	Acoustics ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Acoustics ; Engineering ; Mechanics
关键词[WOS]	HILBERT TRANSFORM ; VIBRATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000182212500009
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16101]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Wang LL,Zhang JH,Wang C,et al. Identification of Nonlinear Systems Through Time-Frequency Filtering Technique[J]. Journal of Vibration and Acoustics,2003,125(2):199-204.
APA	王丽丽,张景绘,王超,&Hu SY.(2003).Identification of Nonlinear Systems Through Time-Frequency Filtering Technique.Journal of Vibration and Acoustics,125(2),199-204.
MLA	王丽丽,et al."Identification of Nonlinear Systems Through Time-Frequency Filtering Technique".Journal of Vibration and Acoustics 125.2(2003):199-204.