摘要
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_Villedistribution (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。
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.
出处
《振动与冲击》
EI
CSCD
北大核心
2003年第3期68-70,74,共4页
Journal of Vibration and Shock
