| 小波包能量谱在内燃机噪声信号故障诊断中的应用 |
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| 引用本文： | 陈军堂,廖世勇,甘剑锋,郭立滨,米林. 小波包能量谱在内燃机噪声信号故障诊断中的应用[J]. 内燃机, 2010, 0(5): 46-48,62 |
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| 作者姓名： | 陈军堂 廖世勇 甘剑锋 郭立滨 米林 |
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| 作者单位： | 1. 重庆通信学院,电力工程系,重庆,400035
2. 重庆理工大学,汽车零部件制造及检测技术省部共建教育部重点实验室,重庆,400050 |
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| 基金项目： | 重庆理工大学汽车零部件制造及检测技术教育部重点实验室开放基金项目 |
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| 摘 要： | 基于噪声信号的故障诊断方法具有易于实现离机、无损检测的优越性,将噪声信号故障诊断方法引入内燃机气门间隙故障诊断中。阐述了小波包能量谱提取的基本原理和方法,通过对内燃机在不同转速不同状态下运行时的噪声信号小波包能量谱的提取研究,确定了噪声信号能量波动范围。并在对比分析中发现,利用内燃机噪声信号在特征频带内的能量波动特征研究方法,可以有效识别气门间隙故障。
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| 关 键 词： | 噪声信号 小波包能量谱 功率谱估计 特征频带 |
The Application of the Wavelet Packet Energy Spectrum in Fault Diagnosis of I.C.E. Noise Signal |
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| CHEN Jun-tang,LIAO Shi-yong,GAN Jian-feng,GUO Li-bin,MI Lin. The Application of the Wavelet Packet Energy Spectrum in Fault Diagnosis of I.C.E. Noise Signal[J]. Internal Combustion Engines, 2010, 0(5): 46-48,62 |
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| Authors: | CHEN Jun-tang LIAO Shi-yong GAN Jian-feng GUO Li-bin MI Lin |
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| Affiliation: | 1.Department of Electric Power Engineering,College of Chongqing Communication,Chongqing 400035,China;2.Key Lab.of Manufacture and Test Techniques for Automobile Parts,Ministry of Education,Chongqing 400050,China) |
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| Abstract: | Fault diagnosis based on noise has an advantage to implement a non-destructive and engine-away testing.The method of noise signal fault diagnosis was introduced in this article,to the diagnosis of engine valve clearance.The theory and extracting method of wavelet packet energy spectrum had been presented,and then the fluctuating range of noise signal energy was confirmed,by means of extracting wavelet packet energy spectrum of engine at different operating conditions.Following the comparative analysis,results showed that the method of wavelet packet energy spectrum of engine noise can be used to identify engine valve faults effectively. |
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| Keywords: | noise signal wavelet packet energy spectrum power spectral estimate characteristic frequency band |
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