Wavelet Analysis of Transient Signals of Structural Responses to Impulsive Loads

Author:

Zhou Qing1,Yang Xia2,Mao Yong Jian1,Deng Hong Jian1

Affiliation:

1. China Academy of Engineering Physics (CAEP)

2. China Academy of Engineering and Physics

Abstract

Based on a brief introduction to elementary theory of wavelet analysis, the disadvantages of wavelet method and wavelet packet method are given. A new wavelet analysis procedure is proposed for decomposition and reconstruction of measured transient signals. This method can search by specific frequency paths, then overcomes the shortcomings of uniform frequency intervals in pure wavelet analyses and of large computational costs in common wavelet packet analyses. As examples, a signal-noise separation and a weak signal extraction are given to show the effectiveness of the new procedure.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Reference9 articles.

1. Y.J. Mao, H.J. Deng, Y.L. Li, R.J. He, H.W. Xiao, X.H. Yue, H.Y. Huang and Q. Zhou: Applied Mechanics and Materials Vols. 29-32 (2010), pp.72-77.

2. Z.X. Cheng: Wavelet Analysis algorithm and Applications (Xi'an Jiaotong University Press, 1998).

3. C.H. Hu, J.B. Zhang, J. Xia and W. Zhang: System Analysis and Design Based on Matlab - Wavelet Analysis (Xidian University Press, 1999).

4. C.H. Hu, T. Zhou, Q.J. Xia and W. Zhang: System Analysis and Design Based on Matlab - Time-Frequency Analysis (Xidian University Press, 2003).

5. Z.K. Peng and F.L. Chu: Mechanical Systems and Signal Processing Vol. 18 (2004), pp.199-221.

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