基于增加回正力矩的SBW汽车防侧翻控制研究  

Research on Vehicle Rollover Control of Steer-By-Wire System Based on Increasing Return Torque

作　　者：潘芳芳 严运兵[1] 夏茂树 邹梓杰 PAN Fang-fang;YAN Yun-bing;XIA Mao-shu;ZOU zi-jie(School of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Wuhan Hubei 430081,China)

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430081

出　　处：《计算机仿真》2020年第10期101-104,351,共5页Computer Simulation

基　　金：纯电动大客车高效驱动技术研究(2018AAA060);高性能电动客车一体化底盘关键技术研究及应用(2018ZYYD027)。

摘　　要：预防汽车侧翻的主要途径是在保证汽车稳定行驶的前提下减小转向轮的转角。以线控转向系统为研究对象,建立了三自由度的侧翻参考模型和线控转向系统(SBW)模型。以横向载荷转移率(LTR)作为侧翻预警研究指标,当LTR超过阀值时,计算附加的回正力矩,使得作用在转向盘上的阻力矩增加,驾驶员在同等输入力矩条件下,转向盘转角输入减小,进而前轮转角减小,因此可达到防侧翻的目的。通过Matlab/Simulink与Carsim进行了典型工况的联合仿真,结果表明,上述控制方法与主动转向防侧翻控制方式可以起到相同的控制效果,并且可以防止驾驶员在慌乱中快速、大转角地改变转向盘转角,以保证汽车的稳定性,同时可以起到侧翻预警的作用。The main way to prevent vehicle rollover is to reduce the steering wheel angle while ensuring the vehicle stability. Taking the Steer-By-Wire vehicle as the research object, a three degree-of-freedom(3 DOF) rollover early warning model and a SBW model were established. The lateral load transfer rate(LTR) was taken as the index for the research of the roll over early warning. When LTR exceeded the threshold value, the additional positive moment was calculated to increase the resistance moment acting on the steering wheel. Under the same input moment, the steering wheel angle input decreased, and the front wheel angle decreased. Therefore, rollover prevention can be achieved. The joint simulation of typical working conditions was carried out by using MATLAB/Simulink and Carsim. The results show that the control method can play the same control effect as the active steering anti-roll control method, and can prevent the driver from changing the steering wheel angle quickly and at a large angle in order to ensure the stability of the vehicle. At the same time can play the role of rollover warning.

关 键 词：侧翻预警 线控转向 回正力矩 主动转向 

分 类 号：TB24[一般工业技术—工程设计测绘]