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| Simulation and validation of three-dimensional road surface spectrum |
| WU Can1, WANG Wei-rui1, CHEN Ying2, PAN Shuang-xia1 |
（1.Institute of Mechanical Design, Zhejiang University, Hangzhou 310027, China;
2. Business Administration College, Zhejiang University of Finance And Economics, Hangzhou 310018 ,China） |
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Abstract By ameliorating the sinusoid superposition method, a new approach to simulate three-dimensional numerically stochastic signals excited by road irregularities was put forward, proceeding from space road spectrum, based on two-dimensional road surface spectrum model. The stochastic road irregularities in any ranks were generated by implementing Matlab software and the time domain model of road surface spectrum was recurred. The simulating theories and mathematic methods for the corresponding model of given spectrum features were analyzed by using the sinusoid superposition method. And road surface spectrum model from the perspectives of power spectral density and coherence was studied. The model can exactly reflect the vertical displacement of variable road pavement and consider the influence between the left and the right wheelpath. The model contains statistic characteristics such as auto power spectral density, cross power spectral density and coherent spectrum. Finally, method can be used to simulate the stochastic road irregularities.
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Published: 29 November 2009
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三维路面谱的仿真建模与验证
通过改进谐波叠加法原理,在现有二维路面谱的基础上,从空间路面频率谱出发,将之拓展到三维空间内的路面谱,给出模拟随机路面谱的方法.用Matlab软件建立符合道路功率谱的任意级路面模型,再现了实际路面激励输入的时程样本.研究了用谐波叠加法得到与给定谱特征相对应的模型的模拟原理及其数学方法,并从功率谱密度与相干性角度对仿真路面谱进行了分析研究,证明该三维路面模型能够较好的反映不同级别路面的垂向位移,并且考虑实际车辆运行中左右轮迹之间的相互影响,包含了车辆左右轮迹的自谱、互谱和相干谱的统计特性,能较好的模拟实际路面的不平度高程.
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| ［1］ LU Sun. Optimum design of “road-friendly” vehicle suspension systems subjected to rough pavement surfaces［J］ .Applied Mathematical Modelling, 2002, 26(5): 635652．
［2］ LAUWERYS C, SWEVERS J, SAS P. Robust linear control of an active suspension on a quarter car test-rig ［J］.Control Engineering Practice, 2005, 13(5): 577586．
［3］ 卢文祥,杜润生.机械工程测试?信息?信号分析 ［M］.2版. 武汉：华中科技大学出版社,1999:189200．
［4］ RUSTIGHI E, ELLIOTT S J, FINNVEDEN S, et al. Linear stochastic evaluation of tyre vibration due to tyre/road excitation［J］. Journal of Sound and Vibration, 2008, 310(4-5): 11121127.
［5］ ZHANG Yong-lin, ZHANG Jia-fan. Numerical simulation of stochastic road process using white noise filtration ［J］. Mechanical Systems and Signal Processing, 2006, 20(2): 363372．
［6］ 黄志宇,刘保华, 陈高平,等. 随机信号的功率谱估计及Matlab的实现［J］. 现代电子技术, 2002, 143(3): 2123．
HUANG Zhi-yu, LIU Bao-hua, CHEN Gao-pin, et al. Power spectrum estimate of random signals and realization in Matlab［J］. Modern Electronic Technology, 2002, 143(3): 2123.
［7］ 余志生. 汽车理论［M］. 北京: 机械工业出版社, 2000: 173180.
［8］ 米奇克 M. 汽车动力学［M］. 陈萌三,译. B 卷.北京: 人民交通出版社, 1994: 195200.
［9］ 张永林,胡志刚,陈立平.时空相关车辆道路的高效数值仿真［J］. 农业机械报,2005,36(9):1315．
ZHANG Yong-lin, HU Zhi-gang, CHEN Li-pin. A new approach to numerical simulation of vehicle road process with temporal-spatial correlation［J］. Transactions of The Chinese Society of Agricultural Machinery ,2005,36(9):1315. |
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