Optimized sparse representation method of impact vibrations extraction

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (1) : 54-58.

QIN Yi1, GUO Lei1, WU Honggang2

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Abstract

Aiming at the problem of impact vibration signals extraction under the strong back-ground noise and other vibration interference, an optimized sparse representation method of impact vibrations based on basis pursuit is proposed. A sparse solution problem for extracting impact vibrations is built, and a transform basis for impact feature extraction is designed. Then the energy ratio of characteristic spectral lines in the whole frequency spectrum is proposed for evaluating the effect of impact feature extraction, and the impact vibration components can be optimally obtained with this evaluation index. The proposed method is applied to simulation test and gear fault diagnosis, and the results show that this approach can better extract the weak periodic impacts, so it has great practical value.

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sparse solution / basis pursuit / transform basis / gear fault / feature extraction

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QIN Yi1, GUO Lei1, WU Honggang2. Optimized sparse representation method of impact vibrations extraction[J]. Journal of Vibration and Shock, 2016, 35(1): 54-58

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