基于一种新的时频分布的机械故障诊断

通过设计核函数，给出了一新的时频分布(TFD)，并将该TFD应用于机械故障诊断。结合两个诊断实例，同时与Winger-Ville distribution(WVD)进行对比，发现该分布具有良好的时频聚集性，并且能够有效地抑制交叉项，事实证明，该分布能够刻画出幅值谱和WVD所不能反映的故障特征信号，能够较好地进行故障诊断。

Mechanical Fault Diagnosis Based on A New Time-frequency Distribution

A new time-frequency distribution (TFD) is proposed by designing a new kernel function,and is applied to mechanical fault diagnosis.Through two diagnosing examples and contrasting with Winger-Ville distribution(WVD),it is found that the new distribution has a high resolution and can suppress cross terms perfectly.In practice,some character of the mechanical faults,which the WVD and the time-domain signal cannot reflect,may be described by the new distribution and so it creates a new tool for mechanical fault diagnosis.