基于电动助力转向的汽车防侧翻预警系统研究

Study on Vehicle Rollover Warning System Based on Electric Power Steering

摘要:

为了使驾驶员能主动感知车辆侧倾状态、防止车辆侧翻,提出了一种新型基于电动助力转向的防侧翻预警系统；利用横向载荷转移率的门限值作为防侧翻预警控制的触发条件,采用助力电机电流补偿控制,当车辆侧倾较大,即横向载荷转移率超过门限值时,预警控制系统使驾驶员操纵转向盘力矩增大,结合侧翻报警灯工作,提醒驾驶员车辆正处于危险工况；MATLAB/Simulink中的仿真分析验证了防侧翻预警控制器能有效的提高车辆的操稳性。

Abstract:

In order to improve driver’s awareness of vehicle roll state and prevent the condition of rollover, a novel vehicle rollover warning system is proposed. Load Transfer Ratio value is acted as a threshold of triggering rollover warning system. When the system is triggered, the assistant torque of EPS motor is reduced, thereby enhancing the driver steering torque, and the rollover warning light is activated. Therefore, the driver can feel the danger driving condition. Simulation results in MATLAB/Simulink show the effectiveness of proposed control strategy to improve vehicle handling stability. 