Wavelet Analysis of Transient Signals of Structural Responses to Impulsive Loads
Qing Zhou, Xia Yang, Yong Jian Mao, Hong Jian Deng · Advanced materials research · 2012
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.