一种基于时频分析的故障状态监测方法

A Fault Diagnosis Method Based on Time-Frequency Analysis

提出了一种基于信号PMH时频分布幅值特征进行故障分离定位的方法 ,并以某柴油机在正常状态、排气阀门存在小裂缝和排气阀门存在大裂缝状态三种情况下缸盖振动信号为分析对象 ,对文中提出的方法进行了验证分析 。

A fault diagnosis method based on the characteristic feature of amplitude of Pseudo-Margenau-Hill Distribution(PMHD) is presented. Experiments are carried out when the condition monitoring is in normal state, in fault state of small crack, and in fault state of big crack. Experiment results show that the method has good performance in the fault isolation.