| 局域波自回归谱及其在柴油机故障诊断中的应用研究 |
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| 引用本文： | 王珍,丁子佳,李玉光,李吉.局域波自回归谱及其在柴油机故障诊断中的应用研究[J].内燃机工程,2004,25(3):51-53. |
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| 作者姓名： | 王珍 丁子佳 李玉光 李吉 |
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| 作者单位： | 大连大学,机械工程系振动噪声研究所,大连,116622 |
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| 摘 要： | 论述了信号局域波分解理论和方法，并结合时间序列分析，提出了适合于柴油机表面振动非平稳时变信号分析的新方法——局域波自回归谱(LW-AR)法。在柴油机的故障诊断中，该方法能够表达出非平稳信号的模糊频带和瞬时频率双重信息，为解决柴油机故障诊断的一些难题提出了新的思路，并通过诊断实例给予了验证。
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| 关 键 词： | 内燃机 局域波自回归谱 故障诊断 柴油机 |
| 文章编号： | 1000-0925(2004)03-051-03 |
Local Wave Auto-regression Spectrum and Its Application to Fault Diagnosis of Diesel Engine |
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| WANG Zhen,DING Zi-jia,LI Yu-guang,LI Ji.Local Wave Auto-regression Spectrum and Its Application to Fault Diagnosis of Diesel Engine[J].Chinese Internal Combustion Engine Engineering,2004,25(3):51-53. |
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| Authors: | WANG Zhen DING Zi-jia LI Yu-guang LI Ji |
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| Abstract: | After discussing local wave decomposing theory, a new method, which fits to analyzing non-stationary and time-varying signal, has been proposed based on the time series analysis. It is called local wave auto-regression (LW-AR) spectrum in this paper. Characteristic information including fuzzy frequency-band and instantaneous frequency is expressed by using this method, so some difficulties have been solved during diesel engine fault diagnosis. At last, its validity is proved in engineering. |
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| Keywords: | I C Engine Local Wave Auto-regression Spectrum Fault Diagnosis Diesel Engine |
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