四轮驱动混合动力汽车驱动防滑控制策略的研究

A Research on the Acceleration Slip Regulation Strategy for a Four Wheel Drive Hybrid Electric Vehicle

本文中以具有发动机、ISG电机和轮毂电机多个动力源的四轮驱动混合动力汽车为研究对象,依据驱动轮的滑模变结构控制算法,制定了目标驱动转矩控制策略。同时,基于模糊控制算法制定了各动力源的转矩协调分配控制策略,并对模糊推理器输出的各转矩进行了修正。在Matlab/Simulink环境下对所设计的控制策略进行了离线仿真。结果表明,在棋盘路面工况下,所设计的控制策略能有效抑制各驱动轮过度滑转,提高了混合动力汽车的动力性和行驶稳定性,改善其燃油经济性。

In this paper,the control strategy for target driving torque is formulated for a 4WD HEV with multiple power sources including engine,ISG motor and in-wheel motors based on the sliding mode variable struc-ture control algorithm for driving wheel. Then,a control strategy for torque coordinated distribution between different power sources is worked out based on fuzzy control algorithm,and each torque output from fuzzy inferencer is correc-ted. Finally an offline simulation on the control strategy devised is conducted with Matla Simulink. The results show that under gridiron road condition, the control strategy devised can effectively suppress the excessive spinning of driving wheel,thus enhance the power performance and driving stability and improve the fuel economy of vehicle.