基于后轮主动脉冲转向的车辆稳定性分析与试验  

Analysis and Test of Vehicle Stability Based on Active Pulsed Steering

作　　者：张宝珍[1] 谢晖[1] 黄晶[1] Amir Khajepour 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [2]滑铁卢大学机电工程学院

出　　处：《农业机械学报》2016年第9期366-373,共8页Transactions of the Chinese Society for Agricultural Machinery

基　　金："十二五"国家科技支撑计划项目(2015BAF01B01)

摘　　要：为了提高车辆操纵稳定性,提出一种后轮主动脉冲转向控制策略,并对此做了理论分析和试验研究。基于试验Lexus车辆分析脉冲转向系统对车辆稳定性能的影响并确定最优的主动转向脉冲参数。设计了控制策略结构与算法,基于Car Sim和Simulink联合仿真分析,验证所提控制方法的有效性。基于试验Lexus车辆,安装液压脉冲转向系统并进行整车试验研究,验证后轮脉冲转向的实用性。仿真和试验结果表明:质心侧偏角和侧向加速度在峰值处分别减小了46.8%、23.5%,提高了汽车的横向稳定性;侧倾因子能控制在设定的阈值范围[-0.8,0.8],车辆侧倾角减小了25.4%,能有效改善车辆防侧翻能力,且展现出比后轮主动转向更好的控制效果。The active steering system can provide steering intervention to improve the vehicle handling stability. In order to improve the vehicle stability, a rear wheel active pulsed steering system was proposed and its performance was analyzed and verified by simulation and vehicle test. Firstly, a hydraulic pulsed steering system was designed and modeled. A simplified 2-DOF vehicle model was considered as the analytical model, and a rear suspension ADAMS model with the hydraulic pulse actuator was developed. Secondly, the effect of the steering system on vehicle stability was studied and the pulse signal parameters （frequency and amplitude） were evaluated to determine their optimum values. And then, a control structure and algorithm were designed, and the simulations were addressed based on CarSim and Simulink to verify the performance of the proposed system. Finally, a set of hydraulic pulse steering device was designed and assembled to carry out road experiments to assess the applicability of the proposed system. Results from simulation and test indicated considerable improvements in vehicle yaw stability can be achieved and also the roll angle was reduced for improving the vehicle rollover ability. Sideslip angle and lateral acceleration in the peak were reduced by 46.8% and 23.5%, which improved the vehicle lateral stability. Roll factor can be controlled in the set threshold limits [ - 0.8,0.8 ] and vehicle roll angle was decreased by 25.4% , the vehicle anti rollover ability was improved and showed a better control effect than the active steering system. The considerable improvements in vehicle stability can be achieved. The proposed system is a very promising for improving the vehicle stability.

关 键 词：车辆 主动脉冲转向 操纵稳定性 参数识别 整车试验 

分 类 号：U463.4[机械工程—车辆工程]