基于EMD的HHT分析过程中用到的子程序hhspectrum，需要安装时频工具箱，文件里即为时频工具箱-HHT based on EMD used in the analysis of the subroutine hhspectrum, you need to install the time-frequency toolbox, toolbox file is time-frequency

经验模态分析，用于机械故障等信号处理领域，效果明显(Empirical mode analysis (EMD) is used in the field of signal processing such as mechanical fault)

基于经验模态分解法（EMD）的Hilbert-Huang变换（HHT）的MATLAB程序。 可将非平稳信号转换为平稳信号，通过将IMF分量累加重构得到平稳信号 。 主程序为HHT.m，需要用到hhspectrum.m函数、instfreq.m函数（在压缩包内）和已安装的EMD工具箱中emd函数。(The empirical mode decomposition (EMD) method based on Hilbert-Huang transform (HHT) of the MATLAB