摘要
研究汽车转向稳定性控制问题。针对线控转向系统的可变转向特性对汽车操纵稳定性的影响,为保证行驶安全,建立基于车辆横摆角速度与稳态横摆角速度之差(反馈系数F1)以及车辆侧向加速度与理想侧向加速度之差(反馈系数F2)反馈的驾驶员模型。结合整车模型和综合评价指标函数,分别对反馈系数F1(F2=0)、F2(F1=0)和F1、F2进行优化,对线控转向系统的行驶状态进行仿真并与无反馈控制的驾驶员模型进行了比较。仿真试验结果表明:基于侧向加速度与横摆角速度共同反馈的方法,对前轮转角进行补偿,可较好的控制车辆的侧向位移、侧向加速度、横摆角速度和质心侧偏角,提高车道跟踪性能、方向稳定性能、降低驾驶员的转向负担,提高汽车的操纵稳定性。
In order to ensure driving safety, a driver model was built based on the feedback of the error between the actual yaw-rate and steady state yaw rate （feedback coefficient F1 ） and the error of the ideal lateral acceleration and the actual lateral acceleration （feedback coefficient 1;2）. Combined with the vehicle model and the comprehen- sive evaluation index function, the feedback coefficients of F1 （ F2 = 0）, F2 （ F1 = 0） and F1, F2 were respectively optimized, the running status of steer-by-wire system was simulated and the simulation results of the driver model for the feedback control was compared to the results of the driver model for the non-feedback control. The simulation ex- perimental results show that the feedback way can better control the lateral displacement, lateral acceleration, yaw- rate and side-slip angle, improve the lane tracking performance and the direction stability performance, and reduce the burden of the driver＇s steering thus improving vehicle handling stability.
出处
《计算机仿真》
CSCD
北大核心
2015年第5期190-194,242,共6页
Computer Simulation
基金
湖南省教育厅科学研究资助项目(11C0810)
