质心转移对四轮转向汽车转向特性的影响

Influence of Centroid Shift on Steering Trait for Four-wheel Steering Vehicles

为了分析汽车质量和质心位置对四轮转向汽车操纵稳定性影响,本文根据二自由度四轮转向车辆的动力学模型,运用Matlab/Simulink对四轮转向特性进行仿真研究,讨论分析了汽车质量和质心位置的改变,对四轮转向车辆转向特性的影响。研究结果表明,汽车质心转移过大时,汽车操纵稳定性大大降低。

The simulation study of four-wheel steering performance under software Matlab/Simulink environment is carried out to analyze the influence of the change of automobile mass and centroid position upon the four-wheel steering vehicle handling and stability performance.The study is based on the dynamic model of a fourwheel steering vehicle with two degree freedom.The influence of the automotive mass and centroid shift on the steering trait of four-wheel vehicle is given.The result obtained indicates that the more centroid shift the automobile offers, the less vehicle handling and stability performance it has.