基于小波变换方法的汽车碰撞信号分析  

Analysis of Car Impact Signal Based on Wavelet Transform Theory

作　　者：周炜[1,2] 张天侠[2] 王维[1] 李大鹏[2] 崔海涛[1] 

机构地区：[1]交通部公路科学研究院 [2]东北大学

出　　处：《公路交通科技》2007年第6期139-143,共5页Journal of Highway and Transportation Research and Development

基　　金：交通部西部交通建设科技资助项目(2005031822322)

摘　　要：研究实车碰撞试验采集的非线性、非平稳信号的处理方法,并进行多分辨率的时频分析。利用小波变换理论,对复杂的瞬态非平稳碰撞信号进行分辨率自适应分析和时频定位,表达碰撞信号的局部特征及变化趋势,发现其内在的本质和规律性。经过对汽车碰撞的原始信号进行db4小波变换,得出特征信号的趋势曲线和系列细节曲线,时频定位的逻辑关系清楚,对分析碰撞过程的时序以及碰撞过程发生的事件具有很好的指导作用。Nonlinear and non-stability car impact signal processing method is strdied, and time-frequency for multi-resolution is analyzed.The resolution ＂auto-zoom＂ is analysed and the time-frequeocy is allocated for complex instantaneous non-stability signal using Wavelet Transform （WT） theory, the local character and variation trend is indicated, the inbeing and rule is discovered. By transforming the original signals of car impact wavelet in db4, the trend curve and series detail curves is gained. The logical of time- frequeocy allocation is clarity. It will be an advantage for analyzing time sequence and events in impact course.

关 键 词：汽车工程 汽车碰撞 小波变换 时频分析 

分 类 号：U467.14[机械工程—车辆工程]