基于AR模型的路面不平度激励模拟  

Study for Road Roughness Based on AR Model

作　　者：陈龙[1] 孙广田[1] 江浩斌[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《农机化研究》2007年第12期27-29,35,共4页Journal of Agricultural Mechanization Research

基　　金：国家自然科学基金项目(50275064)

摘　　要：基于GB7031《车辆振动—路面平度表示》中提出的路面功率谱密度表达式,建立了随机信号AR(自回归)模型,应用Matlab仿真软件对路面不平度随机序列进行了仿真分析,分析了路面不平度AR模型的采样间隔和模型阶数对模拟精度的影响,并对模拟值与理论值进行了比较。结果表明,AR模型拟合的路面不平度功率谱密度能较好地逼近其理论值,具有计算量小和模拟精度高的优点,为车辆动态性能模拟与控制研究奠定了基础。Based on the road surface spectrum mentioned by GB7031-86, it is proposed a AR model （autoregressive） to simulate random sequence of the road roughness, and the simulation is conducted by using Matlab. It analyses the influence from interval of sample and model steps to imitating precision, and has compared simulation value with theory value. The results indicate that the PSD of reconstituted roughness of road by AR model is the same as the given, and it also shows that the calculation amount and the error is smaller. The studies establish a foundation for vehicle dynamic performance simulation and control.

关 键 词：公路运输 路面不平度 仿真分析 路面谱 AR模型 

分 类 号：U416[交通运输工程—道路与铁道工程] TP319[自动化与计算机技术—计算机软件与理论]