Modeling and simulation on white noise of road roughness in time domain
1. School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：According to the requirements of GB/T 7031—2005 to the root mean square of random road surface under different road roughness coefficient, the fitting expression of white noise input was defined. After recalculating the speedrelated e parameter, the perfect road surface roughness domain model was established based on the fitting speed gain function for the fluctuation of e value. The spectral density curves generated by Matlab/Simulink were compared with those of standard road grade to verify the proposed model. The simulation results show that the e value is related to the speed and has no significant relationship with road roughness coefficient. At low speed, the e value fluctuates slightly, while it tends to 0.218 at high speed. After perfecting the model, the error between root mean of random road elevation and road grading standard is from 0.157% to 1.730%, which shows that compared to the traditional time model of white noise, the proposed model has higher accuracy.
李仲兴, 黄建宇, 刘亚威, 江洪. 白噪声路面不平度时域模型的建立与仿真[J]. 江苏大学学报（自然科学版）, 2016, 37(5): 503-506.
LI Zhong-Xing, HUANG Jian-Yu, LIU Ya-Wei, JIANG Hong. Modeling and simulation on white noise of road roughness in time domain[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2016, 37(5): 503-506.
2016, Vol. 37 
