基于AR模型对路面不平度的时域模拟  

Study for Road Roughness Based on AR Model in Time-Domain

作　　者：薛念文[1] 赵伟燕[1] 陈龙[1] 孙广田[1] 周孔亢[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：《拖拉机与农用运输车》2008年第2期87-88,93,共3页Tractor & Farm Transporter

摘　　要：基于GB 7031《车辆振动输入路面平度表示方法》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,对路面不平度时域随机序列进行了仿真分析,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,且具有计算量小,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 GB 7031-86,it is proposed an AR （autoregressive） model to simulate random sequence of the road roughness. The simulation is conducted by using Matlab, and the results are compared with theory value. The resuhs 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：路面不平度 路面谱 AR模型 时域随机信号 

分 类 号：U461.4[机械工程—车辆工程]