基于labview的经验模态分解设计

Design of empirical mode decomposition based on LabVIEW

经验模态分解(EMD)是希尔伯特—黄变换(HHT)的基础算法。具有很高的应用价值。利用labview较好的界面设计能力以及数学计算能力可以设计出EMD的VI程序。在EMD设计中,采用labview的数组控件和内部函数实现了数据镜像功能处理和加窗处理。采用labview的内部样条函数实现插值处理。在EMD的滤波应用中,将原始数据分解成7层本征函数(IMF)和残余量。并将低频IMF与残余量合并得到需要的数据,实现了低通滤波器的功能。并认为EMD在滤波应用中有较好的适应性,但是缺乏滤波的稳定性。

Empirical Mode Decomposition（EMD） is the basic algorithm of Hilbert-Huang Transform（HHT）. It can be used in many field. The VI program of EMD can be designed by using LabVIEW,because Labview has good interface design ability and mathematical compute ability.When EMD is designed.The data mirror processing and window processing are realized by using the array control and the internal function of LabVIEW. The interpolation processing is realized by using the internal spline function of LabVIEW. The original data is decomposed into 7 layers IMF and residual quantity by EMD. The low frequency IMF and the residual amount are combined to get the required data, and the function of the low pass filter is realized. It is considered that EMD has good adaptability in the filtering application, but it lacks the stability of filtering.