Abstract:

The signal envelope and matrix of the singular value were introduced to machinery fault diagnosis,use of IMF envelope matrix and singular
value to extract the characteristics of mechanical failures was proposed.This method is
a more traditional method of feature extraction,feature extraction with the obvious advantages of simple calculation.Simulation results show that this method can effectively extract
the characteristic parameters.They will be applied to the rotor mechanical fault feature extraction to obtain more satisfactory results.

Key words: envelope;singular value;fault characteristics;intrinsic mode function(IMF)

摘要：

将信号包络和矩阵奇异值引入到机械故障诊断中，提出采用IMF(intrinsic mode function)分量包络矩阵的奇异值分解方法提取机械故障特征的方法，该方法全面反映了机械内部损伤情况，计算简单、提取特征明显。仿真实验表明，应用IMF分量包络矩阵的奇异值分解方法可有效、快速地提取机械故障特征参数,该方法在机械转子故障诊断中的应用结果较为满意。

关键词: 包络线;奇异值;故障特征;IMF 