斜率匹配波形延拓法抑制EMD端点效应

Slope matching waveform extension method suppressing the EMD end effect

提出一种抑制EMD端点效应的新方法——斜率匹配波形延拓法。该方法充分考虑了信号边缘处的变化趋势以及信号的内部特征,以信号端点处曲线的斜率作为参考,从信号内部寻找斜率最接近的子波进行匹配,根据匹配子波及其前后波形对信号端点进行波形延拓。仿真和实测信号的分析结果表明,该方法能够有效地抑制端点效应。

A new method is proposed to inhibit the end effect slope matching wave extension method. The method takes the endpoint slope of signal as reference and finds the closest matching wavelet from the signal, then it extends the wave of signal endpoint according to the matching wavelet. Analysis of the simulation signal and measured signal showed that the method can effectively inhibit the end effect.