基于功率谱密度的路面评价与特征参数提取  

Evaluation and extracting characteristic parameters for a road profile based on PSD

作　　者：段虎明[1,2] 石锋[3] 马颖[3] 张开斌[3] 谢飞[3] 

机构地区：[1]中国汽车工程研究院博士后科研工作站,重庆400039 [2]同济大学汽车学院,上海201804 [3]中国汽车工程研究院,重庆400039

出　　处：《振动与冲击》2013年第4期26-30,共5页Journal of Vibration and Shock

基　　金：国家高技术发展(863计划)项目(No.2006AA110116)

摘　　要：介绍了道路路面数据测量系统的构成和数据预处理方法。针对测量的海量道路路面数据,阐述了路面数据的功率谱密度分析与传统的功率谱分析的差异,解读了GB/T7031-2005中的倍频程滤波和路面分级方法,提出了基于拟合直线的斜率截距路面特征参数提取方法和基于功率谱密度曲线的路面分级百分比例特征参数提取方法。在介绍路面评价和特征参数提取方法的基础上,使用真实的路面测量数据作为例子,充分显示了这两种路面特征参数提取方法的效果。实例分析结果表明,使用这两种路面特征参数提取方法来评价和分析道路路面数据,计算过程快捷方便,处理效果简单明显,可在道路路面数据的特征参数提取及其它工程振动信号的统计分析中推广应用。The constructs of data measurement systems of road surface and measured data pre-processing methods in automotive test were reviewed. Based on power spectral density （PSD） analysis of road profile and the explanation of octave-hand filtering and regionalism map method in GB/T 7031-2005, two extraction methods of characteristic parameters were presented. One was percents of PSD of road surface profile in regionalism map, the other was parameters of a fitted straight line based on smoothing PSD of road profile. After introducting these two methods for evaluation and extracting characteristic parameters of road profile, several actual measured road surface data were taken as examples, the results with the two methods were good. The results showed that the two extracting characteristic parameters methods of road surface profile are simple and effective. The two methods could be used in road surface data processing and other engineering vibration signals processing.

关 键 词：路面测量数据 信号处理 功率谱分析 特征参数提取 

分 类 号：U467.1[机械工程—车辆工程] TN911.7[交通运输工程—载运工具运用工程]