The single-channel vibration signal separation by combining the empirical mode decomposition with time-frequency analysis

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (5) : 122-126.

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The single-channel vibration signal separation by combining the empirical mode decomposition with time-frequency analysis

LI Qiang1，FU Cong1，JIANG Hong1，PENG Xian-min2

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Abstract

The separation method of single-channel vibration signal was explored to accomplish the extraction of mechanical vibration source signals. The ensemble empirical mode decomposition technology was utilized to construct the pseudo multi-channel measurement signals. The principal component analysis method was used to determine the number of vibration source signals by the distribution of eigenvalues. Then, the blind source separation algorithm based on time-frequency analysis was implemented to acquire the vibration source signals. Experiments showed that the single-channel vibration signal could be effectively separated. The proposed method is feasible and practical.

Key words

Vibration signal / Empirical mode decomposition / Time-frequency analysis / Blind source separation

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LI Qiang;FU Cong;JIANG Hong;PENG Xian-min. The single-channel vibration signal separation by combining the empirical mode decomposition with time-frequency analysis[J]. Journal of Vibration and Shock, 2013, 32(5): 122-126