摘要
本文首先对离散小波变换进行了简单的介绍,其次详细的描述了小波软门限去噪算法,最后在搭建的发动机台架系统上,测试云内4100QB柴油机的振动信号。选择db3小波函数对信号进行消噪处理,说明确定适当的分解层数和合适的阈值的必要性。
This paper introduces in brief the DWT at the beginning, describes in detail the method of the wavelet soft - thresholding denoising algorithm, and finally built its system on the engine bench test to measure vibration signal of Yunnei 4100QB diesel engine. The db3 wavelet function chosen to carry on denoising to the signal, explains that it is necessary to determine the suitable decomposition layer and the appropriate threshold value.
出处
《内燃机与动力装置》
2009年第5期27-30,共4页
Internal Combustion Engine & Powerplant
关键词
离散小波变换
去噪算法
柴油机
db3小波函数
DWT （ discrete wavelet transform ）
Denoising Algorithm
Diesel Engine
db3 Wavelet Function
