A six-wheel vehicle chassis scheme with a variable wheelbase is proposed to improve the lateral dynamic performance of vehicles. The yaw moment is varied by changing the wheelbase to enhance the lateral dynamic performance of the vehicle. A vehicle lateral dynamics model is established using this approach. The effects of the wheelbase variation on the lateral yaw rate gain, steering stability, and steering error are analysed via numerical calculations. A strategy for wheelbase variation under different working conditions is proposed to enhance the lateral dynamic performance. In addition, by studying the response of the vehicle to various lateral disturbance forces, it is verified that the wheelbase change can enhance the lateral anti-disturbance capability of the vehicle. The simulation verifies the effectiveness of the wheelbase change strategy under a variety of driving conditions.

提出了具有可变轴距的六轮车辆底盘方案，以改善车辆的横向动态性能。偏航力矩通过改变轴距来改变，以增强车辆的横向动态性能。使用这种方法可以建立车辆横向动力学模型。通过数值计算分析了轴距变化对横向偏航率增益，转向稳定性和转向误差的影响。提出了在不同工况下轴距变化的策略，以提高横向动态性能。另外，通过研究车辆对各种横向干扰力的响应，证实了轴距改变可以​​增强车辆的横向抗干扰能力。