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The problem of mode mixing caused by intermittence or noise signal is irritating in empirical mode decomposition (EMD) method. A noise-assisted data analysis method called ensemble EMD (EEMD) was proposed recently to resolve this problem. However, EEMD will generate a new problem that tolerates the residue noise of the signal reconstruction. As an enhanced EEMD, complementary EEMD (CEEMD), is developed...
Targeting the shock characteristics of the vibration signal of a rotor system with local rub-impact fault, a local rub-impact fault diagnosis method of rotor system based on ELMD (ensemble local means decomposition) is proposed in this paper. The local mean decomposition (LMD) is a newly self-adaptive time–frequency analysis method, by which any complicated multi-component signal could be decomposed...
Based on the feature of vibration signal of rotating machinery in speed fluctuation processes which are combined by many modulated signals and the fault characteristic frequency of it is varied following the rotating speed, and in order to suppress the phenomenon of mode mixing, a new method combined Order Tracking analysis with Ensemble Empirical Mode Decom-position(EEMD) algorithm were proposed...
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