机械振动信号频谱中幅频相的精确计算

Accurate Determination of Amplitude,Frequency and Phase of Spectral Lines of Mechanical Vibration Signals

介绍了一种精确计算机械振动信号频谱幅、频、相的方法。在机械振动信号频谱分析的基础上,利用改进的傅立叶变换谱,可以大大提高频率分辨率。经计算检验,该方法精度较高。

This paper introduces a new method for accurately calculating amplitude,frequen- cy and phase of spectral lines of a mechanical vibration signal.On the basis of analyzing spectrum of mechanical vibration signal.It is possible to greatly improve frequency discrimi- nation by means of Improved Fourier Transform.The accuracy obtained is much higher than ordinary interpolation methods.