Abstract: To enhance the roll stability of vehicles under high-speed cornering conditions, a vehicle roll control method based on front and rear active lateral stabilizer bars is proposed. First, considering the coupling characteristics of vehicle lateral motion, yaw motion, and roll motion, as well as the adjustment effect of active stabilizer bars on the roll stiffness of the front and rear axles, a three- degree-of-freedom vehicle roll dynamics model and state space equations incorporating front and rear active stabilizer bars are established. Second, the lateral-load transfer rate (LTR) is adopted as the roll stability evaluation index, and an adaptive torque distribution strategy for the front and rear active stabilizer bars is designed based on the LTR difference between the front and rear axles. On this basis, a fuzzy proportional-integral-derivative (PID) control method is employed to achieve independent coordinated regulation of the front and rear stabilizer bar torques. Finally, two rollover-prone maneuvers, namely J-Turn and Fishhook, are selected for simulation analysis to systematically verify the adaptability, disturbance rejection capability, and parameter perturbation robustness of the proposed method. The results demonstrate that, compared with the vehicle without stabilizer bars, the proposed method effectively reduces the vehicle roll angle and lateral load transfer rate, with the maximum roll angle reduced by more than 57.1% and the critical rollover speed increased by 61.4%. Moreover, the coordinated control of front and rear stabilizer bar torque achieves superior roll suppression performance compared with single stabilizer bar control, exhibiting strong robustness against varying driving conditions and parameter perturbations.

Key words: active lateral stabilizer bar; roll control; lateral load transfer ratio; torque distribution; fuzzy PID; vehicle active safety

摘要： 为改善汽车高速转弯工况下的侧倾稳定性，提出一种基于前后主动横向稳定杆的汽车 侧倾控制方法。首先，考虑汽车侧向运动、横摆运动与侧倾运动的耦合特性，以及主动稳定 杆对前后轴侧倾刚度的调节作用，建立含前后主动稳定杆的三自由度汽车侧倾动力学模型和 状态空间方程。其次，以横向载荷转移率（LTR）作为侧倾稳定性评价指标，根据前后轴 LTR 的 差异，设计前后主动稳定杆扭矩的自适应分配策略；在此基础上，采用模糊比例-积分-微分 （PID）控制方法实现对前后稳定杆扭矩的独立协调调节。最后，选取 J-Turn 和 Fishhook 两 种侧翻工况进行仿真分析，系统验证了控制方法对不同行驶工况的适应性、抗干扰能力及参 数摄动鲁棒性。结果表明，与无稳定杆相比，该方法能有效降低汽车侧倾角和横向载荷转移 率，侧倾角最大值降低 57.1%以上，将汽车侧翻危险速度提高 61.4%；前后稳定杆扭矩的协调 控制相比单一稳定杆控制具有更优的侧倾抑制效果，且对不同工况和参数变化具有强鲁棒性。

关键词: 主动横向稳定杆；侧倾控制；横向载荷转移率；扭矩分配；模糊 PID；汽车主动安全