| 希尔伯特-黄谱的端点效应分析及处理方法研究 |
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| 引用本文： | 杨建文,贾民平.希尔伯特-黄谱的端点效应分析及处理方法研究[J].振动工程学报,2006,19(2):283-288. |
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| 作者姓名： | 杨建文 贾民平 |
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| 作者单位： | 东南大学设备监控与故障诊断研究所,江苏,南京,210096 |
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| 基金项目： | 国家自然科学基金;江苏省研究生培养创新工程项目 |
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| 摘 要： | 希尔伯特-黄谱可以将机械振动信号分解为有限的模式，然后以时频方式揭示机械的运行状况；然而，作为希尔伯特-黄谱的两个关键步骤，经验模式分解和希尔伯特变换都被“端点效应”所困扰；该文分析和研究了“端点效应”产生的原因，提出采用时间序列建模与预测方法对信号数据进行延拓，达到消除或改进经验模式分解和希尔伯特变换“端点效应”的目的，从而优化希尔伯特-黄谱。
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| 关 键 词： | 故障诊断 希尔伯特-黄谱 时间序列分析 端点效应 |
| 文章编号： | 1004-4523(2006)02-0283-06 |
| 收稿时间： | 2005-04-22 |
| 修稿时间： | 2005-11-10 |
Study on processing method and analysis of end problem of Hilbert-Huang spectrum |
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| YANG Jian-wen,JIA Min-ping.Study on processing method and analysis of end problem of Hilbert-Huang spectrum[J].Journal of Vibration Engineering,2006,19(2):283-288. |
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| Authors: | YANG Jian-wen JIA Min-ping |
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| Affiliation: | Research Center of Condition Monitoring and Fault Diagnosis, Southeast University, Nanjing 210096, China |
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| Abstract: | The Hilbert-Huang spectrum can decompose the mechanical vibration signal as finite modes ,then disclose the running status of machinery by the means of time-frequency; whereas ,both of the steps of Hilbert-Huang spectrum,the Empirical Mode Decomposition and Hilbert Transform,are disturbed by the end distorting. In this paper, the analyzsis and research on the root cause of end problem are given, and the time series modeling and predicting are introduced to extend the signal for the purpose of optimizing the EMD and HT. At last,the effect of Hilbert-Huang spectrum is optimized finally. |
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| Keywords: | fault diagnosis Hilbert-Huang spectrum time series analysis end problem |
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