小波变换技术在内燃机振声信号分析中的应用

Application of Wavelet Analysis Technology to Vibration and Acoustic Signal Processing in Internal Combustion Engine

介绍了小波分析方法在内燃机测试方面的发展和应用,探讨了应用小波技术进行车用发动机表面辐射声源的识别问题。以一台车用发动机表面辐射噪声的测量和识别分析为例,提出了一种车用发动机主要噪声源诊断和识别的测试分析方法。提取了小波分析结果特征,进行噪声源识别,其结果是满意的。

In this paper, the development and application of wavelet method in diesels are presented. According to the analysis of acoustic signals using wavelet transform, an investigation of the noise source identification in a diesel engine is presented. The research provides the reliable basis for the engineering practice to reduce the vehicle noise level. In order to identify the sources, the characters are extracted and the results are valid.