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| Approach to application in the gear fault diagnosis based on the LMD and multi-scale morphology |
| HOU Gao-yan,Lv Yong, XIAO Han, HAO Zhi-qiang |
| Wuhan University of Science and Technology; Wuhan 430081 |
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Abstract Mathematical morphology is a kind analysis method of nonlinear and non-stationary, it has a strong ability to restrain pulse interference, but has no ability to filter the white noise. Aim at this shortage, an multi-scale morphology method based on local mean decomposition(LMD) is proposed. the fault signal of multi-component frequency modulation and amplitude modulation is decomposed into a series of single component (PF), thus can
implement signal de-noising processing and also can obtain the total amplitude modulation information of original signal.
Select the high energy PFs and sum them, then reconstitute them, finally use multi-scale morphological difference filter to extract the fault characteristic frequency. It can show the validity of this method through simulation and gear fault simulation.
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Received: 13 June 2013
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2014, Vol. 33 
