皮卡车主动悬架防侧翻控制策略研究

Study of Anti-rollover Control Strategy on Pickup Truck with Active Suspension

针对皮卡车的结构及工作特点,基于主动悬架的工作原理,对车辆侧翻稳定性进行研究.设定横向载荷转移率为车辆侧翻判定阈值,采用PID控制及模糊控制两种方法,设计防侧翻控制器,对悬架系统施加相应的主动控制力,以矫正车身姿态,增强车辆侧翻稳定性.基于CarSim与Matlab/Simulink环境,建立皮卡车主动悬架防侧翻控制联合仿真模型,在鱼钩试验和双移线两种工况下进行仿真试验,以验证所设计的控制策略的有效性.结果表明,建立的主动悬架防侧翻控制策略能够有效控制车辆急转弯时车身姿态的变化,维持车辆良好的侧倾稳定性.

According to the structure and working characteristics of pickup trucks,the rollover stability was studied in this paper based on the working principle of active suspension.The lateral load transfer ratio（LTR）was set as the threshold judgment in vehicle rollover,and the anti-rollover controller strategy was proposed by PID and Fuzzy methods.In order to correct the vehicle body attitude and enhance the rollover stability,the corresponding active control force was applied for the suspension system.Finally,in order to verify the effectiveness of the designed control strategy,the combined simulation model of anti-rollover control of pickup truck active suspension was established and the simulation tests were conducted in Fishhook and DLC（double lane change）two different conditions,based on CarSim and Matlab/Simulink environment.The results show that the anti-rollover control strategy of active suspension can effectively control the change of body attitude when the vehicle turns sharp,and maintain a good roll stability of the vehicle.