新型功率分流混合动力汽车的动力性优化  

Acceleration Performance Optimization of Novel Power-Split Hybrid Electric Vehicle

作　　者：王晨[1] 郭明林[2] 刘国志 

机构地区：[1]同济大学新能源汽车工程中心,上海201804 [2]上海交通大学机械与动力工程学院,上海200240 [3]科力远混合动力技术有限公司系统控制科,上海201501

出　　处：《华南理工大学学报（自然科学版）》2015年第11期96-104,共9页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划(863计划)项目(2011AA11A207);国家自然科学基金资助项目(51275355)~~

摘　　要：动力性是整车的重要性能指标之一.为研究混合动力汽车的动力性优化问题,按照车速序列将全油门加速过程转化为多级决策过程,提出了动力性优化问题的动态规划求解方案;建立了新型功率分流混合动力汽车模型,基于Matlab仿真平台得到了全局最优控制策略;同时,建立了双电机转矩图,定义电机速比及动力电池功率带,分析、归纳了全油门加速控制策略.整车动力性优化试验结果显示,优化后车辆的百公里加速时间减少了15.7%,基于动态规划算法的控制策略可显著提升整车动力性.Acceleration performance is one of important vehicle performance indicators.In order to solve the optimization problem of acceleration performance of hybrid electric vehicle,the full-load acceleration progress is converted into the multi-level decision-making process according to vehicle speeds,and a solution scheme based on dynamic programming is put forward.Then,a model for the novel power-split hybrid vehicle is constructed,and a globally-optimized control strategy is obtained on the Matlab platform.Meanwhile,a dual-motor torque figure is established,in which both the motor speed ratio and the battery power band are defined to analyze the control strategy of full-load acceleration.The vehicle test results of acceleration performance optimization show that one-hundred-kilometer acceleration time after the optimization decreases by 15.7%,which means that the proposed control stra-tegy on the basis of dynamic programming can significantly improve the vehicle acceleration performance.

关 键 词：混合动力总成 加速控制 混合动力汽车 动态规划 优化 

分 类 号：U469.72[机械工程—车辆工程]