王秋勤;赵龙庆
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。
关键词： 离散小波变换;去噪算法;柴油机;db3小波函数
Abstract: 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.
Keywords: DWT(discrete wavelet
transform);Denoising Algorithm;Diesel Engine;db3 Wavelet Function
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