基于小波变换的MHD信号的提取

EXTRACTION OF MHD SIGNAL USING WAVELET TRANSFORM

混有干扰的Mirnov信号是一类非平稳信号 ,用Fourier变换的方法进行MHD信号的提取不能取得满意的效果 ,因而提出采用小波变换的方法对Mirnov信号进行处理。理论分析与实验结果表明 ,利用小波变换的时频分析特性对Mirnov信号进行滤波处理 ,可以有效地去除干扰 ,提取出有用的MHD信号。

The Mirnov signal with interference is a nonstationary signal, from which the MHD signal is not effectively extracted using the Fourier transform.A method of wavelet transform for processing the disturbed Mirnov signal is presented.Analyses in theory and experimental results show that the interference is removed effectively and the MHD signal can be extracted from the disturbed Mirnov signal based on the time frequency analysis of wavelet transform.