基于动态路面特征的并联式混合动力汽车驱动力控制策略研究

Study on Traction Control Strategy for Parallel Hybrid Electric Vehicles Based on Dynamic Road Characteristics

为了提高并联式混合动力汽车加速时的动力性与稳定性,提出了一种基于电机力矩动态调节的动态牵引力控制策略,所建立的控制策略基于路面最优滑转率的实时估计,通过电机力矩的动态调节来控制驱动轮的动态牵引力以提高加速性能并抑制过度滑转,对动态牵引力控制与能量管理的算法融合问题进行了研究,以避免动态牵引力控制对能量管理策略的干扰。最后,在MATLAB/Simulink环境中进行了系统仿真验证,结果表明所提出的控制策略显著地改善了车辆的加速性与行驶稳定性,同时还可以实现能量回收,可以有效提高了系统的节能效果。

In order to improve the power performance and stability of parallel hybrid electric vehicle when accelerating,a dynamic traction control strategy based on dynamically adjusting the motor torque was proposed along with its system simulation.The presented strategy is established on the optimal slip ratio real time estimation,while the dynamic traction of driving wheel is controlled by adjusting the motor torque to improve the accelerating ability and preventing the excessive slip of driving wheel.In addition,the algorithm fusion between dynamic traction control strategy and energy management strategy is researched to avoid interference with energy management strategy.Finally system simulation was carried out in the environment of MATLAB/Simulink,and the results indicate that the proposed control strategy can observably improve the vehicle accelerating ability and driving stability,meanwhile,it can realize energy recycle and improve the energy-saving effect to some extent.