基于ECMS和Radau伪谱拼接法的多模式HEV能量管理策略优化  

Optimization of Energy Management Strategy for Multi-Mode Hybrid Electric Vehicle Based on ECMS and Radau

作　　者：赵克刚[1] 麦茂瑜 李梓棋 刘延伟[2] 甄玉珂 Zhao Kegang;Mai Maoyu;Li Ziqi;Liu Yanwei;Zhen Yuke(South China University of Technology,Guangzhou 510641;Guangdong University of Technology,Guangzhou 510006)

机构地区：[1]华南理工大学,广州510641 [2]广东工业大学,广州510006

出　　处：《汽车技术》2022年第2期13-20,共8页Automobile Technology

基　　金：广东省重点领域研发项目(2019B090912001);广东省自然科学基金项目(2020A1515010773)。

摘　　要：为解决现有能量管理策略在评估多模式混合动力汽车燃油经济性时易出现模式切换、发动机起停和离合器分离与接合过于频繁的问题,针对串并联式PHEV混合动力系统,通过等效燃油消耗最小策略(ECMS)确定全球统一轻型车辆测试循环(WLTC)工况下的模式切换序列,并基于该结果,应用Radau伪谱拼接法(RPKM)求解最优模式切换时刻及油耗表现。WLTC工况仿真结果表明,在ECMS-RPKM联合算法控制下,发动机起停次数和离合器分离与接合次数较ECMS算法分别减少9.41%和26.92%,同时最优油耗降低1.23%,所提出的方法可在较合理的模式切换频度下获得全局的油耗优化效果,更准确地评价多模式复杂混合动力系统的节油潜力。In order to solve the problem of frequent mode switching,engine start and stop,and frequent clutch opening and closing when the existing energy management strategy evaluates the fuel economy of multi-mode hybrid electric vehicles,the Equivalent fuel Consumption Minimum Strategy(ECMS)is used for the series-parallel PHEV hybrid system to determine the mode switching sequence under the Worldwide Light-duty Test Cycle(WLTC)operating conditions,and based on the results,the Radau Pseudo-spectral Knotting Method(RPKM)is used to solve the optimal mode switching time and fuel consumption performance.The simulation results of WLTC operating conditions show that the number of engine starts and stops and the number of clutch disengagement and engagement times under the ECMS-RPKM combined algorithm are reduced by 9.41%and 26.92%respectively,while the optimal fuel consumption is reduced by 1.23%.The proposed method can be used to achieve the overall fuel consumption optimization effect under a more reasonable mode switching frequency,and the fuel saving potential of the multi-mode complex hybrid power system can be evaluated more accurately.

关 键 词：混合动力汽车 能量管理策略 等效燃油消耗最小策略 Radau伪谱拼接法 

分 类 号：U469[机械工程—车辆工程]