Application of Wavelet Analysis in the Vibration Signal of the High Dam Drainage
Yujie Gu, Xi rui-chao · IOP Conference Series Materials Science and Engineering · 2019
Abstract Wavelet analysis is a localized time-frequency analysis method,it uses the combination of time domain and frequency domain to show the characteristics of a signal. In this paper uses the wavelet analysis to decompose the vibration signal in different frequency band. And we can get the energy of the signal in different frequency band and the vibration characteristics of the slab by decomposing different frequencies and the different scales of the signal analysis at the different frequency band. According to the signal noise sigma, doing the wavelet threshold noise reduction uses the general threshold, the threshold set by Birge-Massart strategy, the threshold set by penalty strategy and the strategy of the threshold to estimate sample signal, then gets the best scheme.