DECORRELATION EMD: A NEW METHOD OF ELIMINATING MODE MIXING

Xiao Ying;Yin Fuliang

Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (4) : 25-29.

PDF(1432 KB)
PDF(1432 KB)
Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (4) : 25-29.
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DECORRELATION EMD: A NEW METHOD OF ELIMINATING MODE MIXING

  • Xiao Ying 1,2 Yin Fuliang 1
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Abstract

Mode mixing is one of the difficulties of HHT in engineering applications, and a new method that embedding decorrelation operator into EMD process for solving the mode mixing is proposed. The essence of mode mixing is the mutual coupling of the information of the IMFs which results in the IMFs cannot represent a meaningful physical process, and it can be considered that the mode mixing is caused by the IMFs are not completely orthogonal. For the orthogonality and the non-correlation of the random process is equivalent, embedding decorrelation operator into EMD process can improve the orthogonality of the IMFs effectively and eliminate mode mixing. The simulation results show the effectiveness of this method.

Key words

decorrelation / orthogonality / time-frequency analysis

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Xiao Ying;Yin Fuliang . DECORRELATION EMD: A NEW METHOD OF ELIMINATING MODE MIXING[J]. Journal of Vibration and Shock, 2015, 34(4): 25-29
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