频域特征参数分析是通过功率谱分析将振动信号从时域变换到频域，然后利用统

Frequency domain analysis of the characteristic parameters by analyzing the power spectrum of the vibration signal from the time domain to the frequency domain by applying statistical methods of analysis and processing. Frequency domain analysis and time domain analysis compared the frequency domain to provide information more intuitive, rich. Wherein the frequency domain includes: four characteristic parameters of the reaction frequency band position changes; average frequency p1, the average frequency p2, p3, and the center of gravity stability factor waveform frequency P4; 3 reaction selected frequency-domain spectral dispersion characteristics and the degree of concentration parameter; amplitude variance p5, p6 and amplitude values ​​of the degree of partial kurtosis p7.

频域特征参数分析是通过功率谱分析将振动信号从时域变换到频域，然后利用统计方法进行分析和处理。频域分析与时域分析相比，频域提供信息更为直观、丰富。频域的特征主要包括：4个反应主频带位置变化的特征参数；平均频率p1、平均频度p2、波形稳定因子p3和重心频率p4;选取3个反应频谱分散和集中程度的频域特征参数；幅值方差p5、偏值程度p6和幅值峭度p7。

Frequency domain characteristic parameter analysis is to transform the vibration signal from time domain to frequency domain through power spectrum analysis, and then analyze and process it by statistical method. Compared with time domain analysis, frequency domain analysis provides more intuitive and rich information. The characteristics of frequency domain mainly include: four characteristic parameters reflecting the position change of main frequency band; average frequency P1, average frequency P2, waveform stability factor P3 and center of gravity frequency P4; three frequency domain characteristic parameters of response spectrum dispersion and concentration degree; amplitude variance P5, deviation degree P6 and amplitude kurtosis P7.