| 气缸压力的时频分析及其在内燃机故障诊断中的应用 |
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| 引用本文： | 夏勇,张振仁,商斌梁,薜模根,郭明芳.气缸压力的时频分析及其在内燃机故障诊断中的应用[J].信号处理,2001,17(2):168-173. |
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| 作者姓名： | 夏勇 张振仁 商斌梁 薜模根 郭明芳 |
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| 作者单位： | 西安第二炮兵工程学院研究生二队 |
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| 摘 要： | 对气缸压力进行时-频分析,探讨了气缸压力信号与气阀机构状态之间的关系.对气缸压力信号进行二进小波分解,计算分解后尺度1上信号各频带的能量比,从中提取诊断特征量,从而对气阀机构进行故障诊断.结果表明此方法是可行、有效的.
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| 关 键 词： | 时-频分析 小波分析 气缸压力 故障诊断 能量比 |
Time-Frequency Analysis of Cylinder Pressure and Its Application to Fault Diagnosis for I.C. Engines |
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| Xia Yong,Zhang Zhenren,SHANG Binliang,Xue Mogen,Guo Mingfang.Time-Frequency Analysis of Cylinder Pressure and Its Application to Fault Diagnosis for I.C. Engines[J].Signal Processing,2001,17(2):168-173. |
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| Authors: | Xia Yong Zhang Zhenren SHANG Binliang Xue Mogen Guo Mingfang |
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| Affiliation: | The Second Artillery Engineering Institute Xi'an |
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| Abstract: | Cylinder Pressure signal was analyzed in time and frequency domain and the relationship between the cylinder pressure signals and the states of valve were discussed in this paper. Cylinder pressure signal was processed with wavelet analysis. Energy percentage of various frequency bands of the signal on scale I was computed, from which the diagnosis characteristic was extracted to recognize the fault of the valve. The results show that this method is effective and feasible. |
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| Keywords: | Time-frequency Analysis Wavelet analysis Cylinder Pressure Fault Diagnosis Energy percentage |
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