基于动态规划不同优化目标的HEV转矩分配策略对比研究

Comparison of torque distribution strategies with different optimization objective function for HEV based on dynamic programming

双动力源的结构模式使得混合动力汽车相对于传统汽车拥有更高的燃油经济性,同时也给混合动力汽车整车控制器的设计提出了更高的要求。采用动态规划算法,分别以油耗最低同时电池SOC波动尽可能小以及整车效率最高为目标,对混合动力汽车在NEDC循环工况下的最优转矩分配进行求解。并将两种转矩分配计算结果进行对比分析,得出选择不同优化目标对控制效果的影响以及SOC参数选择的标准,为制定更加高效的控制规则提供了理论依据。

The hybrid electric vehicles with dual power sources have higher fuel economy compawhi le it puts forward higher requirements to the design of vehicle controller. This paper applied rithm to calculate the optimal torque distribution of hybrid vehicles under the NEDC driving cycle with two different optimiza-tion objective ： the lowest fuel consumption whi le the stable fluctuation of S0C and the highest efficiency of the vehicle. It ana-lyzed the comparison of these two kinds of torque distribution results to figure out the influence of diffetive on the vehicle performance , and proposed the standard of S0C parameters setting which could provide a theoretical basisfor the development of more efficient control strategies.