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| 车辆非匀速行驶时路面随机输入的时频研究 | |
| 引用本文： | 张立军,张天侠. 车辆非匀速行驶时路面随机输入的时频研究[J]. 汽车工程, 2005, 27(6): 710-714 |
| 作者姓名： | 张立军 张天侠 |
| 作者单位： | 东北大学,沈阳,110004;辽宁工学院,锦州,121001;东北大学,沈阳,110004 |
| 摘 要： | 首先应用协方差等效方法建立了单轮随机输入非平稳时域模型。根据时间-空间一、二阶微分关系，给出了前后轮变时差相关的问题，较好地解决了非平稳路面时域研究中的低速大幅值波动问题。并由各向同性假设直接得到了车辆左右轮的相关关系，因此适合各种车辆。分析表明Wigner—Ville谱很好地反映了频率特征和路面波形特征。 |
| 关 键 词： | 路面模型 四轮时域相关 Wigner-Ville谱 |
| 收稿时间： | 2004-11-22 |
| 修稿时间： | 2004-11-222005-04-18 |
A Study on Road Random Inputs to a Vehicle with Uneven Speed in Time and Frequency Domains |
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| Zhang Lijun,Zhang Tianxia. A Study on Road Random Inputs to a Vehicle with Uneven Speed in Time and Frequency Domains[J]. Automotive Engineering, 2005, 27(6): 710-714 | |
| Authors: | Zhang Lijun Zhang Tianxia |
| Affiliation: | 1. Northeastern University, Shenyang 110004; 2. Liaoning Institute of Technology, Jinzhou 121001 |
| Abstract: | The covariance equivalence method is used to establish the single-wheel random input unsteady model. According to the first and second order differential relationships between time and space, the correlation of varying time lag between front and rear wheels is obtained, which improves the amplitude fluctuation in low frequency range. Based on the assumption of isotropy, the correlation between left and right wheels is directly obtained, and hence the model is applicable to various types of vehicle. Finally, the Wigner-Ville spectrum is applied to the analysis of instantaneous power spectrum of road random inputs, which well reflects the wave shape feature of road surface and frequency feature. |
| Keywords: | Road surface model Four wheels correlated in time domain Wigner-Ville spectrum |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |