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中国电机工程学报 2007, 27(35) 84-89 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 发电 |
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HHT方法在转子振动故障诊断中的应用 |
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向玲 朱永利 唐贵基 |
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华北电力大学机械工程系 华北电力大学机械工程系 华北电力大学机械工程系 |
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摘要：
传统的振动故障诊断主要是基于频谱分析的方法，而Hilbert-Huang变换得出的时频图是分析故障信号奇异性的有效工具，也是非平稳信号比较有力的分析工具。Hilbert- Huang变换方法以经验模态分解为基础，使信号变换后得到的瞬时频率具有物理意义。该文通过几种时频分析方法如魏格纳-维尔(Wigner-Ville)分布、小波变换等比较，发现Hilbert-Huang变换的时频分析更能够清楚给出时频分布情况，准确反映系统的固有特性。对转子实验台几种典型振动故障信号进行了分析研究，结果表明，利用Hilbert-Huang变换的时频分析不仅能直观检测信号中的微弱奇异成分，而且可以有效地进行故障诊断，实现早期故障预报。该方法为旋转机械状态检测和故障诊断提供了新的手段。 |
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关键词：
Hilbert-Huang 变换
旋转机械
故障诊断
信号处理
时频分析
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Application of Hilbert-Huang Transform Method in Vibration Faults Diagnosis for Rotor System |
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［中］向玲 ［英］XIANG Ling |
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Abstract:
The traditional vibration diagnostic method was based on spectrum analysis for rotating machinery. The time-frequency map by Hilbert-Huang transform plays a significant role in the analysis of singularities, which hide in the signal, and is an effective method for non-stationary signal. Based on empirical mode decomposition(EMD), the Hilbert-Huang method can obtain a true instantaneous frequency representation of a signal. The Hilbert-Huang time-frequency analysis was compared with common methods, e.g., Wigner-Ville distribution and wavelet transform, which displays the Hilbert-Huang time-frequency analysis has more true and distinct time-frequency distribution. The experiment data of typical vibration faults signal were analyzed by the method, and the result shows that the proposed method can not only reveal the time-frequency features of vibration signal but also extrude components of low energy. Therefore，it is a very effective tool to diagnose the early faults of rotor system. And it provides new means for state detection and fault diagnosis of rotating machine. |
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Keywords:
Hilbert-Huang transform
rotation machine
fault reconstruction
superposition of signal
time series model
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收稿日期 2006-12-30 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 向玲 |
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作者简介: |
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作者Email: ncepuxl@163.com;xiangling5042@126.com |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．唐贵基 向玲 朱永利.基于HHT的旋转机械油膜涡动和油膜振荡故障特征分析[J]. 中国电机工程学报, 2008,28(2): 77-81 |
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| Copyright by 中国电机工程学报 |
