后轮独立驱动FSEC电子差速控制策略研究

Research on FSEC Electronic Differential Control Strategy Based on Rear Wheel Independent Drive

近期由于电动汽车的飞速发展,电动方程式赛车也得到了相关发展。在2015年中国举行了首届中国大学生电动方程式汽车大赛(FSEC)。考虑到赛车的动力性与机械结构设计,各个车队多采用后轮独立驱动设计,而为了发挥赛车的最大性能,电子差速控制策略就显得及其重要。但是国内对此研究较少,且算法过于复杂。以转矩差速为研究对象,以车轮滑移角为反馈变量,以实现电子差速,其控制策略算法简单,应用性强,并通过Matlab与Carsim的联合仿真验证。仿真结果表明,上述控制策略能有效利用地面附着力,使赛车有更好的操纵性与稳定性。

Recently,electric formula is developed rapidly due to the prosper of electric vehicles.In 2015,China held the first China University Student Electric Formula Car Competition(FSEC).Considering about the dynamics and the mechanical structure design of the car,the participating teams mainly adopt the rear wheel independent drive design.In order to maximize the performance of the car,the electronic differential control strategy plays a vital role.However,there are few studies in China and the algorithm is too complicated.In this paper,the torque differential was taken as the research object,and the wheel slip angle was used as the feedback variable to realize the electronic differential speed.The control strategy was simple and applicable,and it was verified by the joint simulation of Matlab and Carsim.The simulation results show that the control strategy can effectively utilize the ground adhesion and realize better maneuverability and stability of the car.