| 基于LMD的时频分析方法及其机械故障诊断应用研究 |
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| 引用本文： | 王衍学,何正嘉,訾艳阳,袁静.基于LMD的时频分析方法及其机械故障诊断应用研究[J].振动与冲击,2012,31(9):9-12. |
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| 作者姓名： | 王衍学 何正嘉 訾艳阳 袁静 |
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| 作者单位： | 1. 桂林电子科技大学 机电工程学院，桂林 541004; 2. 西安交通大学机械制造系统工程国家重点实验室，西安 710049 |
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| 基金项目： | 国家自然科学基金重点资助项目 |
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| 摘 要： | 如何有效地从振动信号中提取有用信息成分一直以来都是故障诊断领域研究的热点。局部均值分解(Local Mean Decomposition, LMD)是一种新的信号自适应分解方法。本文研究基于LMD的瞬时频率求解、时频分析及其故障诊断的应用。LMD的时频分析方法成功提取出实验室转子碰摩特征以及实际低速变载轧机齿轮局部故障信息，这证实了方法的有效性。
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| 关 键 词： | 局部均值分解 时频分析 碰摩 齿轮箱 故障诊断 |
| 收稿时间： | 2012-12-23 |
| 修稿时间： | 2011-1-9 |
Several key issues of local mean decomposition method used in mechanical fault diagnosis |
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| WANG Yan-xue
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HE Zheng-jia
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ZI Yan-yang
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YUAN Jing.Several key issues of local mean decomposition method used in mechanical fault diagnosis[J].Journal of Vibration and Shock,2012,31(9):9-12. |
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| Authors: | WANG Yan-xue HE Zheng-jia ZI Yan-yang YUAN Jing |
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| Affiliation: | 1.Guilin University of Electronic Technology, Guilin 541004;2. State Key Laboratory for Manufacturing and System Engineering, Xi’an Jiaotong University, Xi’an 710049 |
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| Abstract: | Local mean decomposition(LMD) is a novel signal decomposition method in time-frequency analysis.The calculations of the instantaneous frequency and instantaneous time-frequency spectrum were discussed.Then LMD was applied to the fault diagnosis of rubbing rotor and gearbox in a mill.The results demonstrate the effectiveness of LMD for early detection of faults and its possible wide applications in machine surveillance. |
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| Keywords: | local mean decomposition time-frequency analysis rubbing gearbox fault diagnosis |
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