| 颜诗源,李新俊,吴勋,张仕念,何敬东.基于 HHT 方法的公路运输振动信号时频分析[J].装备环境工程,2014,11(5):23-26. YAN Shi-yuan,LI Xin-jun,WU Xun,ZHANG Shi-nian,HE Jing-dong.Frequency Analysis for Vibration Signal from Road Transportation Using HHT[J].Equipment Environmental Engineering,2014,11(5):23-26. |
| 基于 HHT 方法的公路运输振动信号时频分析 |
| Frequency Analysis for Vibration Signal from Road Transportation Using HHT |
| 投稿时间：2014-06-05 修订日期：2014-06-22 |
| DOI：10. 7643 /issn. 1672-9242. 2014. 05. 005 |
| 中文关键词: 振动功率谱 Hilbert-Huang 变换 时频分析 |
| 英文关键词:vibration power spectrum Hilbert-Huang transformation time-frequency analysis |
| 基金项目: |
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| Author | Institution |
| YAN Shi-yuan | Division 203, No. 109 Beiqing Road, Haidian, Beijing 100094, China |
| LI Xin-jun | Division 203, No. 109 Beiqing Road, Haidian, Beijing 100094, China |
| WU Xun | Division 203, No. 109 Beiqing Road, Haidian, Beijing 100094, China |
| ZHANG Shi-nian | Division 203, No. 109 Beiqing Road, Haidian, Beijing 100094, China |
| HE Jing-dong | Division 203, No. 109 Beiqing Road, Haidian, Beijing 100094, China |
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| 中文摘要: |
| 目 的 分析具有非线性、非平稳特征的公路运输振动信号的时频信息。 方法 利 用 Hilbert-Huang 变换算法, 在对公路运输的振动信号进行 EMD 分解的 基础上, 开展 Hilbert 谱和各 IMF的功率谱密度计算, 并与 常规的 功 率谱进行比较。 结果 基于 IMF 分量的 功 率谱可以 克服传统Fourier 功率谱计算在低频偏低、高频偏高的 误差。 结论 基于 HHT 的 公路运输振动信号时频分析方法是一种有效的运输振动非平稳信号分析手段。 |
| 英文摘要: |
| 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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