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

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