| 基于小波分析的发动机气门漏气故障诊断研究 |
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| 引用本文： | 沈寿林,郑海起,等.基于小波分析的发动机气门漏气故障诊断研究[J].机械科学与技术(西安),2001,20(1):113-114. |
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| 作者姓名： | 沈寿林 郑海起 |
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| 作者单位： | 军械工程学院!石家庄050003 |
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| 摘 要： | 对发动机气门漏气声学特性及其振动诊断机理进行了研究 ,在模拟实验的基础上对测取的燃爆段缸盖振动信号进行小波变换 ,比较了三种工况下各尺度小波分解信号能量与总能量之比 ,验证了理论研究的正确性。提取高频带内能量与总能量之比作为特征参数 ,有效地诊断了发动机气门漏气故障。
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| 关 键 词： | 发动机 气门 小波分析 故障诊断 |
| 文章编号： | 1003-8728(2001)01-0113-02 |
| 修稿时间： | 1999年10月28 |
A Study on Wavelet-Analysis-Based Diagnosis for Leakage of Engine Valves |
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| SHEN Shou-lin,ZHENG Hai-qi,GU De-qiao,PENG Shun-tang,.A Study on Wavelet-Analysis-Based Diagnosis for Leakage of Engine Valves[J].Mechanical Science and Technology,2001,20(1):113-114. |
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| Authors: | SHEN Shou-lin ZHENG Hai-qi GU De-qiao PENG Shun-tang |
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| Abstract: | In this paper, the acoustic characteristics and vibration diagnosis mechanism for leakage of engine valves are studied. The vibration signal at combustion is transformed by wavelet. In three kinds of condition, the energy ratio between the decomposition signal and general signal is obtained. It shows that the theoretical study is correct. The ratio between the energy in high frequency and total energy is used as a feature for diagnosing the fault of the leakage of the engine valve. |
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| Keywords: | Engine Valve leakage Wavelet analysis Fault diagnosis |
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