基于分数阶傅里叶变换的滚动轴承故障诊断

分数阶傅里叶变换作为傅里叶变换的扩展,它在傅里叶变换的基础上增加了一个新的优点,它在诊断滚动轴承故障时,可以使不稳定的轴承故障信号的时频特性更好的展示出来。再通过分析故障信号的时频特性,从而得出滚动轴承故障是外圈故障、内圈故障还是滚动体故障,并分析其故障程度。

As an extension of the Fourier transform,the fractional Fourier transform adds a new advantage to the Fourier transform in diagnosing rolling bearing faults,the time-frequency characteristic of the unstable bearing fault signal can be displayed better.By analyzing the time-frequency characteristics of the fault signal,it can find out whether the rolling bearing fault is the outer ring fault,the Inner Ring Fault or the rolling element fault,and analyze the fault degree.