装备环境工程
裝備環境工程
장비배경공정
EQUIPMENT ENVIRONMENTAL ENGINEERING
2014年
5期
23-26
,共4页
颜诗源%李新俊%吴勋%张仕念%何敬东
顏詩源%李新俊%吳勛%張仕唸%何敬東
안시원%리신준%오훈%장사념%하경동
振动功率谱%Hilbert-Huang 变换%时频分析
振動功率譜%Hilbert-Huang 變換%時頻分析
진동공솔보%Hilbert-Huang 변환%시빈분석
vibration power spectrum%Hilbert-Huang transformation%time-frequency analysis
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 Hil-bert-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。
目的：分析具有非線性、非平穩特徵的公路運輸振動信號的時頻信息。方法利用 Hil-bert-Huang 變換算法，在對公路運輸的振動信號進行 EMD 分解的基礎上，開展 Hilbert 譜和各 IMF的功率譜密度計算，併與常規的功率譜進行比較。結果基于 IMF 分量的功率譜可以剋服傳統Fourier 功率譜計算在低頻偏低、高頻偏高的誤差。結論基于 HHT 的公路運輸振動信號時頻分析方法是一種有效的運輸振動非平穩信號分析手段。
목적：분석구유비선성、비평은특정적공로운수진동신호적시빈신식。방법이용 Hil-bert-Huang 변환산법，재대공로운수적진동신호진행 EMD 분해적기출상，개전 Hilbert 보화각 IMF적공솔보밀도계산，병여상규적공솔보진행비교。결과기우 IMF 분량적공솔보가이극복전통Fourier 공솔보계산재저빈편저、고빈편고적오차。결론기우 HHT 적공로운수진동신호시빈분석방법시일충유효적운수진동비평은신호분석수단。
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 den-sity 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 non-stationary vibration signal from road transportation.
