自己写的幅值谱分析的matlab程序，可以应用与机械振动信号分析中。-this is a matlab program that can analylize the amplifier of a wave.

电能质量扰动信号信号通过hilbert变换得到瞬时频率，瞬时幅值，hilbert谱，边际谱等重要特征，从而实现特征提取。-Power quality disturbance signals are obtained by hilbert transform to obtain instantaneous frequency, instantaneous amplitude, hilbert spectrum, marginal spectrum and other important featu