基于ADAMS/MATLAB联合仿真的LuGre动态轮胎模型研究

RESEACH OF THELUGRE DYNAMIC TIRE MODEL BASED ON ADAMS / MATLAB CO-SIMULATION

轮胎作为车辆与路面接触的唯一载体,其力学特性是车辆动力学响应分析和控制的重要基础.目前仿真研究中所使用的轮胎模型多为稳态模型,不能精确地描述轮胎的动态特性.因此,将动态轮胎模型应用于车辆动力学仿真软件中,对于整车动力学仿真和研究具有重要的作用.多体动力学软件Adams中自带的轮胎摩擦模型为静态模型,它将摩擦系数视为一个静态值,而实际轮胎与路面之间的摩擦是动态变化的,应为相对速度和位移的动态函数,所以本文以基于Lu Gre动态轮胎模型,应用Matlab/Simulink软件构建动态轮胎模块,通过接口与Adams/Car连接,进行整车模型与Simulink轮胎模型的同步联合仿真,实现轮胎与路面动态接触的历程的模拟,提高车辆系统仿真的精度.

Tires are the only carrier of the contact between the vehicle and road surface. Their mechanical property is important for analysis and control on the vehicle dynamic response. At present, the tire simulation mostly focuses on the steady-state model. But it can not describe the dynamic characteristic of the tire accurately. There- fore, it plays a significant role to add the dynamic tire model in the vehicle dynamics simulation. The tire friction model in the multi-body dynamical software ADAMS is static, where the friction is regarded as a static value. However, in actual, the friction between the tire and road surface is dynamic, and it should be a dynamic func- tion of the relative velocity and displacement. To this end, in this paper, the dynamic tire LuGre model using the Matlab/Simulink software is constructed. Through connecting the interface with Adams/Car, co-simulation between the vehicle model and the simulink tire model is carried out in order to achieve the dynamic contact between tire and road and improve the accuracy of vehicle system analysis.