| 基于EMD的天然气发动机供气系统故障诊断方法 |
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| 引用本文： | 段礼祥,张来斌,李刚,王福善,殷树根.基于EMD的天然气发动机供气系统故障诊断方法[J].车用发动机,2010(1). |
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| 作者姓名： | 段礼祥 张来斌 李刚 王福善 殷树根 |
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| 作者单位： | 1. 中国石油大学,北京,机电学院,北京,102249
2. 塔里木油田分公司装备处,新疆,库尔勒,841000 |
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| 基金项目： | 教育部新世纪优秀人才支持计划资助项目(NCET—05—0110);;中国石油天然气集团公司创新基金(07E1005) |
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| 摘 要： | 针对天然气发动机故障信号的非平稳性、非线性等特点,提出一种基于EMD提取能量特征参数的故障诊断方法。从天然气发动机供气系统正常、气门间隙大、排气阀漏气3种工况振动信号的EMD能量熵值中发现,当供气系统发生故障时,各IMF分量的能量会发生变化。因此运用EMD方法提取最有效的IMF分量的能量特征指标,利用C均值模糊聚类法对此特征进行聚类进而建立天然气发动机供气系统的故障识别模型。现场试验验证了该方法在天然气发动机供气系统故障诊断中的有效性。
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| 关 键 词： | 天然气发动机 经验模态分解 能量熵 模糊聚类 故障诊断 |
Fault Diagnosis of Gas Supply System for Natural Gas Engine Based on EMD |
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| DUAN Li-xiang,ZHANG Lai-bin,LI Gang,WANG Fu-shan,YIN Shu-gen.Fault Diagnosis of Gas Supply System for Natural Gas Engine Based on EMD[J].Vehicle Engine,2010(1). |
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| Authors: | DUAN Li-xiang ZHANG Lai-bin LI Gang WANG Fu-shan YIN Shu-gen |
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| Institution: | 1.College of Mechanical and Electronic Engineering;China University of Petroleum;Beijing 102249;China;2.Department of Equipment;Talimu Oilfield Company of China Petroleum;Kuerle 841000;China |
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| Abstract: | For the non-stationary and non-linear characteristics of natural gas engine vibration signal,the diagnosis method of extracting energy feature parameters based on empirical mode decomposition(EMD) was put forward.The energy entropies of vibration signals were analyzed under the normal,large valve gap and exhaust valve leaking conditions of natural gas engine.The results show that the energies of different IMFs change when the faults of gas supply system occur.Accordingly,the most effective energy feature pa... |
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| Keywords: | natural gas engine EMD energy entropy fuzzy cluster fault diagnosis |
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