| 内燃机传动噪声识别的小波分析方法 |
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| 引用本文： | 杨金才,郝志勇,贾维新. 内燃机传动噪声识别的小波分析方法[J]. 内燃机工程, 2005, 26(5): 74-76 |
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| 作者姓名： | 杨金才 郝志勇 贾维新 |
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| 作者单位： | 浙江大学,杭州,310027;浙江大学,杭州,310027;浙江大学,杭州,310027 |
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| 摘 要： | 为了降低内燃机噪声必须确定其噪声源。基于内燃机噪声信号非平稳和周期性的特点，用模拟数据说明了将小波分析应用于内燃机噪声信号分析的合理性，并利用连续小渡变换对一台车用发动机前、后端的噪声源进行了识别诊断，确定了发动机的噪声源，证明了小渡分析是内燃机噪声源识别的一种有效方法。
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| 关 键 词： | 内燃机 小波分析 噪声源识别 |
| 文章编号： | 1000-0925（2005）05-074-03 |
| 收稿时间： | 2004-09-21 |
| 修稿时间： | 2004-09-21 |
The Wavelet Analysis Method of Transmission Noise Source Identification of I.C.Engine |
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| YANG Jin-cai,HAO Zhi-yong,Jia Wei-xin. The Wavelet Analysis Method of Transmission Noise Source Identification of I.C.Engine[J]. Chinese Internal Combustion Engine Engineering, 2005, 26(5): 74-76 |
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| Authors: | YANG Jin-cai HAO Zhi-yong Jia Wei-xin |
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| Affiliation: | Zhejiang University, Hangzhou 310027, China |
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| Abstract: | To reduce the sound level of an internal combustion engine,the noise sources must be identified first.The noise of IC engine is a unstable and periodic signal.A numerical example indicated that the method processing the IC engine noise signal with wavelet analysis was reasonable.The CWT(continuous wavelet transform) method was used to identify the noise sources in the front and rear of an engine,and the noises sources were identified correctly.These show that the wavelet analysis is a valid method of noise source identification of IC engine. |
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| Keywords: | I. C. Engine Wavelet Analysis Noise Source Identification |
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