应用Hilbert-Huang变换的齿轮箱故障诊断

Application of Fault Diagnosis of Gear Box Based on Hilbert-Huang Transform

提出了基于经验模态分解(EMD)的齿轮箱故障诊断HHT方法,介绍了Hilbert-Huang变换理论及其算法.此后以1台现场轧机故障减速机为对象,对采集的故障信号进行EMD分解,得到固有模态函数(IMF)分量,然后对所有固有模态函数进行Hilbert变换处理,所得三维图和边际谱图较为清晰地表达了故障信息,说明了该方法在工程应用中的适用性.

This paper presents the HHT method of the gear box fault diagnosis based on empirical mode decomposition（EMD）,introduced Hilbert-Huang transform theory and its algorithms.After regarding one mill reducer that have break down as the object,the fault signals collected were decomposed into a set of intrinsic mode function（IMF） using EMD,then the Hilbert transform is applied to each intrinsic mode function,and then the fault information is more clearly expressed by three-dimensional map and the marginal spectrum,to illustrate the method applicability in engineering applications.