Time filter

Source Type

Shen L.,Zhejiang University | Yang F.-C.,Zhejiang University | Zhou X.-J.,Zhejiang University | Liu L.,Inner Mongolia First Machinery Group DADI Engineering Machinery Co
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2010

Based on improved EMD and morphological filter, a novel method was proposed to extract gear fault feature. Noises were reduced by morphological filters installed cascadely, performing the operation of power off-on and on-off sequentially. Mutual information was used to remove pseudo-components in EMD after the frequency families were separated by EMD. A difference morphological filter was used for demodulating component signal to extract fault feature based on the fact that the eigen modal function of each order is a monocomponent demodulated signal. Experiment results show that the method is more effective than the envelope demodulation in extracting fault feature and reducing noise. Source

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