An improved EEMD method and its application in rolling bearing fault diagnosis

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (16) : 51-56.

CHENG Junsheng1,WANG Jian1,GUI Lin2

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Abstract

In order to deal with the problem that ensemble empirical mode decomposition (EEMD) method only considers the effect of the amplitude of the noise on the decomposition results, and the added white noise cannot be neutralized completely, an improved EEMD method was proposed by analyzing the influence of maximum frequency of noise on the decomposition results.The number of ensemble members was fixed to 2, and then the noise was added to the signal with different maximum frequency and amplitude.After the traversing, the result with the minimal orthogonal coefficient was selected as the final decomposition result.At the same time, the complementary EEMD (Complementary EEMD, CEEMD) method was used to reduce the effect of residual noise.Through the simulation signal and the measured signal analysis, the results show that the improved method has some advantages in suppressing mode mixing and fault diagnosis compared with the original method.

Key words

EEMD / mode mixing / maximum noise frequency / fault diagnosis

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CHENG Junsheng1,WANG Jian1,GUI Lin2. An improved EEMD method and its application in rolling bearing fault diagnosis[J]. Journal of Vibration and Shock, 2018, 37(16): 51-56

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