摘要
在简述加速度法测量路面反应谱和小波降噪原理的基础上,采用Daubechies小波分别对碎石路面反空谱和沙土地路面反应谱进行降噪处理。通过实验结果分析,小波去噪使采样信号在时域和频域的特性都得到增强,路面不平度的分析准确性有所提高,证明这是改善实验测试信号质量的一种有效方法。
By analysing road surface roughness, it is possible to get road surface spectrum by measuring vehicle vibration acceleration signals. However, the data samples coming from experiments generally have high frequency and a big quantity and corrupted by a great deal of noise. Using wavelet analysis to de-noise, the characteristics of signals in both time field and frequency field are enhanced. This method can improve the quality of measured data.
出处
《振动工程学报》
EI
CSCD
北大核心
2005年第2期257-260,共4页
Journal of Vibration Engineering
关键词
随机振动
小波变换
路面不平度
信号降噪
功率谱估计
random vibration
wavelet analysis
road surface roughness
de-noising
PSD estimation
