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针对车辆主动侧倾控制问题,基于车辆侧倾与横摆响应特性分析,提出一种液压式主动稳定杆(active stabilizer bar,ASB)系统的设计方案。设计滑模控制算法,以提高车辆的侧倾稳定性。对前、后轴主动式稳定杆的反侧倾力矩进行动态分配,以改善车辆的转向特性。基于MATLAB/Simulink,建立了14自由度整车动力学模型、液压系统模型、路面输入模型等,在典型工况下分别对PID+前馈控制和滑模控制系统进行仿真研究。仿真结果表明:与传统的PID+前馈控制相比,采用滑模控制算法的液压式ASB系统在鲁棒性和适应性方面具有明显优势,有效地改善车辆的侧倾与横摆响应,进一步提高了车辆的侧倾稳定性、行驶平顺性与操纵稳定性。
In order to solve the problem of vehicle active roll control, a design scheme of a hydraulic active stabilizer bar (ASB) system is proposed based on the analysis of vehicle roll and yaw response characteristics. Design sliding mode control algorithm to improve the stability of the vehicle roll. On the front and rear axle active stabilizer bar anti-roll torque dynamically allocated to improve the vehicle’s steering characteristics. Based on MATLAB / Simulink, a 14-DOF vehicle dynamics model, a hydraulic system model and a road surface input model are established. Under typical operating conditions, PID + feedforward control and sliding mode control system are simulated respectively. The simulation results show that compared with the traditional PID + feedforward control, the hydraulic ASB system using the sliding mode control algorithm has obvious advantages in robustness and adaptability, effectively improving the roll and yaw response of the vehicle, and further improving The vehicle’s roll stability, ride comfort and handling stability.