随机信号在路面不平度仿真中的应用  

Application of Random Signals to Road Roughness Simulation

作　　者：谢伟东[1] 王磊[1] 佘翊妮[1] 沈季胜[1] 

机构地区：[1]浙江工业大学车辆工程研究所,杭州310014

出　　处：《振动．测试与诊断》2005年第2期126-130,155,共6页Journal of Vibration,Measurement & Diagnosis

摘　　要：重点研究了随机信号在路面不平度仿真中的应用,分别使用AR法和伪白噪声法在空间域下对C级路面进行仿真。仿真使用Matlab语言,仿真步长为0.1m,路面长度为10km。结果表明:两种仿真方法的计算量与所仿真的路面长度成正比,AR法计算量小,而伪白噪声法算法稳定性好,提高仿真精度的措施灵活。The paper mainly describes the application of the random signal to the simulation of road roughness,the arithmetics of AR and the pseudo white noise are used to simulate the C level road roughness respectively. The simulation is conducted by using Matlab, and simulated step size is 0.1 meters,the simulated road is 10 kilometers long.The result indicates that the calculation amounts of the two arithmetics are proportional to the length of the road,the calculation amount of AR is small,but the pseudo-white-noise arithmetic is stable,and the measures to improve its simulation precision are flexible. The research of the road roughness simulation plays a significant role in the further study of the automobile vibration and the indoor analogue test of automobile.

关 键 词：路面不平度 AR模型 伪白噪声 随机信号 

分 类 号：TN911.7[电子电信—通信与信息系统] TP274[电子电信—信息与通信工程]