THE WAVELET ANALYSIS METHOD ON THE TRANSIENT SIGNAL

作     者：吴淼 

出 版 物：《Journal of Coal Science & Engineering(China)》 (煤炭学报（英文版）)

年 卷 期：1996年第2卷第1期

页      面：90-97页

学科分类：0810[工学-信息与通信工程] 070207[理学-光学] 07[理学] 08[工学] 081002[工学-信号与信息处理] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：transient signals short-time fourier transform discrete wavelet transform 

摘      要：Many dynamic signals of mining machines are transient, such as load signals when roadheader’s cutting head being cut-in or cut-out and response signals produced by these *** these transient signals, the traditional Fourier analysis method is quite *** limitations of analysis, resolution by using Short-Time Fourier Transform (STFT) on them were discussed in this paper. Because of wavelet transform having the characteristics of flexible window and multiresolution analysis, we try to apply it to analyse these transient signal. In order to give a pratical example,using D18 wavelet and Mallat’s tree algorithm with MATLAB, the discrete wavelet transform was calculated for the simulating response signals of a three-degree-of freedom vibration system when it Was under impulse and random excitations. The results of the wavelet transform made clear its effectiveness and superiority in analysing transient signals of mining machines.