基于小波分析的受扰涡街流量信号处理

Signal Processing of Vortex Flow with Noise Based on Wavelet Analysis

正弦信号和噪声信号在多尺度小波变换下其小波谱高频部分具有明显不同表现。本文对含噪声的涡街信号进行多尺度小波分解,去除噪声小波谱,再利用Matlab软件平台编辑重构出有效正弦信号。仿真实验表明,该方法是有效的。

Under multi-scale wavelet transofrm the spectrums of valid sin--signal and noise are obviously differ- ent. So the article applies multi--scale wavelet transform to decompose signal of vortex flow and remove wavelet spectrum from noise,then programs to restructure valid signal using Matlab. Simulate test proves the method is valid.