基于模糊控制的主动抗侧倾液压互联悬架研究

Research on active anti-roll hydraulically interconnected suspension based on fuzzy control

随着车速提高,车辆侧翻的风险随之增加,因此车辆的抗侧倾性能愈发受到人们的重视。液压互联悬架(HIS)能有效提升车辆的侧倾刚度且几乎不影响车辆的平顺性。根据所研究的主动液压互联悬架,设计了一个以侧倾角和侧倾角加速度作为输入的模糊控制器,直线行驶时控制器几乎不工作,此时车辆等同于被动HIS,两者平顺性近似相同;高速转向时通过控制电机推动调节油缸的活塞杆运动,产生主动的抗侧倾力矩提高车辆的操稳性能。搭建了主动抗侧倾HIS实验台架,通过台架实验验证了主动HIS模型的正确性。对试验车辆底盘进行主动抗侧倾HIS测试系统改装,进行蛇形和双移线试验,并利用MATLAB/Simulink进行相应仿真,比较分析被动HIS车辆和主动HIS车辆的车身侧倾角峰值。结果表明,与被动HIS相比,主动HIS能有效提高车辆的抗侧倾性能。

As the speed of the vehicle increases,the risk of the vehicle rollover increases,so the anti-roll performance of the vehicle has also received more and more attention.Hydraulically interconnected suspension(HIS)can effectively improve the roll stiffness of the vehicle and hardly affect the ride comfort of the vehicle.According to the active hydraulically interconnection suspension studied,a fuzzy controller that took the roll angle and roll angle acceleration as input was designed,which almost did not work when driving in a straight line and the vehicle was equivalent to passive HIS,and the smoothness of the two was approximately the same;the controller adjusted the piston movement of the power cylinder by controlling the motor when the vehicle was steering at high speed,generating an active anti-roll moment to improve the handling performance of the vehicle.An active anti-roll HIS experimental bench was built,and the correctness of the active HIS model was verified through the bench experiment.By retrofitting the active anti-roll HIS test system on the chassis of the test vehicle,the slalom and double lane change tests were carried out,and the corresponding simulation was carried out using MATLAB/Simulink.The peak of the body roll angle of the passive HIS vehicle and the active HIS vehicle were compared and analyzed.The results showed that,compared with the passive HIS,the active HIS could effectively improve the anti-roll performance of the vehicle.