基于半主动悬架的车辆抗侧倾控制研究

Study on Anti-Sway Control of Vehicles Based on Semi-Active Suspension

悬架系统可提高乘坐舒适性,用于抑制车身的侧倾。基于车辆多工况行驶下的抗侧倾控制需求,建立带有半主动悬架系统的车辆四自由度动力学模型,以空气悬架和电机式主动稳定杆作为执行器,分别选用模糊控制和滑模控制来设计抗侧倾控制器,通过Matlab/Simulink与Carsim建立联合仿真模型来验证所设计控制策略的有效性。仿真结果表明:在双移线和鱼钩工况下,使用带有主动横向稳定杆的半主动悬架系统可有效减小车辆的侧倾角,降低车辆侧翻风险。

The suspension system can serve to improve the ride comfort and be used to suppress vehicle’s body roll.Based on the demand of anti-roll control under multiple working conditions of the vehicle,it establishes a four-level free dynamics model of a vehicle with a semi-active suspension system.Air suspension and motorized active stabilizer bar are used as actuators,and fuzzy control and sliding mode control are selected to design the anti-roll controller respectively.The effectiveness of the designed control strategy is verified by a joint simulation model with Matlab/Simulink and Carsim.The simulation results show that the semi-active suspension system with active lateral stabilizer bar can effectively reduce vehicle roll angles and the risk of vehicle rollover under double shift and fishhook conditions.