基于循环工况的电动汽车传动系参数正交优化设计

Orthogonal optimal design for drive system parameter of electric vehicle based on vehicle driving cycle

以电动汽车传动系参数优化设计为目标,在电动汽车整车设计指标基础上建立电动汽车整车仿真模型,以ECE城市循环工况为基础,提出一种基于循环工况的电动汽车传动系速比正交优化设计策略。基于电动汽车整车动力性和经济性同步提升的目标,定义循环工况下电动汽车整车性能综合指标系数,利用提出的正交优化设计策略对车辆传动系速比进行优化设计。依据选定方案对ECE城市循环工况下整车及电机动态特性进行了仿真分析,仿真结果表明:利用本文提出的基于循环工况的电动汽车传动系参数正交优化设计策略能很好地满足ECE工况特性要求,这对提高电动汽车动力性能、增大续驶里程等都具有十分重要的意义。

In order to match and optimize the drive system of the electric vehicle,the electric vehicle model was established based on the design parameters of the vehicle.A novel method from orthogonal optimal design theoretic was proposed to select the most effective drive ratio for the vehicle based on the vehicle ECE driving cycle.And to obtain the optimal transmission ratio and develop the vehicle dynamic performance,a vehicle performance integration coefficient was defined to select the most effective drive ratio for the vehicle based on the proposed method.Finally,the vehicle performance was analyzed based on the optimization method proposed in this work.The simulation results show that the novel orthogonal optimal design method greatly meets drive targets in the ECE driving cycle,and it is much significant for the electric vehicle to improve the vehicle power performance and driving range.