The research of fault diagnosis on hoist gearbox base on Hil bert-Huang transfor m

Abstract：Hilbert-Huang transform is an analytical method that can separate the analyzed signals into several Intrinsic Mode Functions (IMFs) by the Empirical Mode Decomposition (EMD) , and then time-frequency distribution was obtained by using the Hilbert transform.Principle of the method was introduced and applied in the fault diagnosis of gearbox.The margin spectrum that obtained from Intrinsic Mode Functions was analyzed and the fault was confirmed.The result shows that Hilbert-Huang transform is an effective method for fault diagnosis of gearbox.

Keyword：Hilbert-Huang transform;empirical mode decomposition;gear;fault diagnosis;