准确的车辆物理参数对车辆振动信息的使用有重要的作用。本文提出一种基于路面激励来识别车辆参数的方法。首先, 根据车辆轮胎与路面位移的接触条件, 推导出车辆各自由度的加速度响应关于路面位移激励的频响函数, 建立了频响函数、车辆加速度响应、路面横截面形状在频域中的关系; 然后根据路面的频率响应建立目标函数, 并使用内点法进行求解来识别车辆物理参数; 最后进行数值仿真, 成功识别出车辆模型的物理参数, 结果表明, 该方法能够对车辆物理参数进行有效识别。

Accurate vehicle physical parameters play an important role in the use of vehicle vibration information. A method to identify vehicle parameters based on road excitation is proposed. Firstly, the frequency response function of vehicle acceleration response with respect to road displacement excitation is derived based on the contact conditions for the displacement between vehicle tires and road, and the relationship between frequency response function, vehicle acceleration response and road cross-section shape in the frequency domain is established. Then, the objective function is established using the frequency response of the road surface, and the physical parameters of the vehicle are identified using the interior point method. Finally, numerical simulation is performed and the physical parameters of the vehicle model are successfully identified. The results show that the method can effectively identify the physical parameters of vehicles.