小波分析及其在机械故障诊断中的应用

Study of signal processign in machin ery diagnosis

简要介绍了傅立叶变换、加窗傅立叶变换以及小波变换的特点,研究了它们在机械故障诊断领域的应用,通过对比可以发现,小波变换具有很强的时频局部化功能,可以有效应用于非平稳信号的分析,弥补了传统的、基于傅立叶变换的频谱分析方法的缺陷,是一种理想的机械故障诊断的信号处理方法。

This introduces the features of Foun ier transform,STFT and wavelet transform briefly,their application to machinery diagnosis are researched.The results show tha t the wavelet transform has porewful ability for the analysis of time -fre quency domain which help itself to be used for impulse signal.It' s a better method in machinery diagnosig than t he Fourier transform.