该程序绘制了仿真信号的FFT频谱和功率谱，并调用emd分析方法，绘制了emd分解结果，以及瞬时包络和瞬时频率图，还有Hilbert-Huang谱和Hilbert边际谱。-Program to draw the FFT spectrum of simulation signal and power spectrum call the emd analysis method, drawn emd decomposition, as well as instantaneous envelope and instantaneous frequency plot, there is the Hilbert-Huang spectrum and Hilbert marginal spectrum.