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| Frequency Analysis for Vibration Signal from Road Transportation Using HHT |
| Received:June 05, 2014 Revised:June 22, 2014 |
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| DOI：10. 7643 /issn. 1672-9242. 2014. 05. 005 |
| KeyWord:vibration power spectrum Hilbert-Huang transformation time-frequency analysis |
| Author | Institution |
| YAN Shi-yuan |
Division 203, No. 109 Beiqing Road, Haidian, Beijing , China |
| LI Xin-jun |
Division 203, No. 109 Beiqing Road, Haidian, Beijing , China |
| WU Xun |
Division 203, No. 109 Beiqing Road, Haidian, Beijing , China |
| ZHANG Shi-nian |
Division 203, No. 109 Beiqing Road, Haidian, Beijing , China |
| HE Jing-dong |
Division 203, No. 109 Beiqing Road, Haidian, Beijing , China |
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| Abstract: |
| Objective To study the time-frequency character of the vibration signal from road transportation which is nonlinear and non-stationary. Methods Using the Hilbert-Huang transformation algorithm, the vibration signal from road transportation was firstly decomposed by the EMD method, based on which its Hilbert spectrum and the power spectral density were calculated and compared to the traditional Fourier power spectral density. Results The power spectral density of the IMFs can overcome the error of low value in low frequency and high value in high frequency by the traditional Fourier method. Conclusion The HHT algorithm is a powerful method to analyze the time-frequency character of the nonlinear nonstationary vibration signal from road transportation. |
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