复杂动态路面的电动轮附着状态识别与稳定控制策略研究

Study on Identification of Adhesion State and Stability Control Strategy of Electric Drive Wheel on Complex Dynamic Road

复杂动态路面条件下的轮胎-路面附着稳定性识别与控制对电驱动车辆的安全行驶具有重要意义,但目前仍缺少有效的分析和判定方法。针对复杂动态路面切换的情形,从驱动力-附着力传递特性的角度,分析了路面切换过程中力传递因子的动态行为,提出了基于力传递因子的附着状态识别方法,分析讨论了路面切换后的车辆稳定控制策略。基于CarSim联合仿真对比验证了基于电气参数的力传递因子估计方法的正确性与有效性,结果表明利用力传递因子可以检测出路面附着特性的变化;采用降转矩稳定性控制策略,提高了车辆在路面附着特性变化时的附着稳定性。研究结果对提升电动车辆在复杂路面附着情形的安全性具有重要意义。

The identification and control of tire-road adhesion stability under complex dynamic road condition is very important to the safe driving of electric vehicle.The dynamic behavior of the force transfer factor in the process of road surface switching from the perspective of driving-adhesion transfer characteristics is analyzed,a method to identify the adhesion state based on the force transfer factor is proposed,and the vehicle stability control strategy after road surface switching is analyzed and discussed.The validity and effectiveness of the force transfer factor estimation method based on electrical parameters are verified by CarSim combined simulation.The change of road adhesion can be detected by force transfer factor is shown in the results.The reduced torque stability control strategy is adopted to improve the vehicle adhesion stability when the road adhesion characteristics change.The research results are of great significance for improving the safety of electric vehicles on complex road.