【作者】 李娟；

【导师】 周云山； 田永；

【作者基本信息】 湖南大学 ， 车辆工程（专业学位）， 2020， 硕士

【摘要】 能源短缺和环境问题成为全球发展的绊脚石,世界各国都在研究新能源技术。插电式混合动力汽车是一种低油耗且不受电池电量限制行驶里程的新能源汽车。PHEV(Plug in Hybrid Electric Vehicle)的控制策略是目前研究工作的重点及难点之一,优秀的控制策略可以大大提高整车的燃油经济性。本文基于双电机插电式混合动力汽车横向课题,以双电机PHEV为研究对象,对其控制策略进行了深入研究,开展并完成了以下工作:首先根据整车设计要求,对PHEV总体结构进行设计。进行动力总成参数匹配计算;确定整车的CAN网络架构,制定整车CAN通讯协议。然后,根据总体结构设计及参数匹配结果,在AVL CRUISE中搭建双电机PHEV整车对象模型,进行了总线连接及模型正确性检查,为本文研究重点控制策略的开发奠定了基础。基于PHEV动力系统特点设计了逻辑门限值控制策略。通过分析PHEV的运行模式和工作模式,在CD(Charge-Depleting)和CS(Charge-Sustaining)两种运行模式下分别设计了电机驱动为主控制策略和优化发动机工作区间为主控制策略。在此基础上,设计了以SOC(电池荷电状态)、ΔSOC、需求转矩与发动机最大转矩比值I为输入,以发动机目标转矩与最大转矩比值O为输出的模糊逻辑控制器。基于Matlab/Simulink建模平台,完成了两种控制策略模型搭建。最后将整车对象模型和控制策略模型建立Interface方式的联合仿真。对逻辑门限值控制策略进行了动力性和燃油经济性仿真分析,研究了预设行程和工况对模糊逻辑控制策略的影响,最后对两种控制策略在不同行驶距离的燃油经济性进行对比仿真分析。结果表明,两种控制策略均达到设计目标,模糊逻辑控制策略具有更好的鲁棒性,燃油经济性更优。更多还原

【Abstract】 Energy shortage and environmental problems have become a stumbling block for global development.All countries in the world are studying new energy technologies.Plug in hybrid electric vehicle is a new energy vehicle with low fuel consu mption and unlimited mileage without battery power.The control strategy of PHEV is one of the difficult points in the current research.Excellent control strategy can greatly improve the fuel economy of the whole vehicle.In this paper,the control strate gy of dual motor PHEV is studied based on the lateral subject of dual motor plug-in hybrid electric vehicle.The details of the work are as follows:First,overall structure of PHEV is designed according to the requirements of design.The powertrain parameters are calculated and matched.The CAN network structure and the CAN communication protocol are formulated.Then,the dual motor PHEV vehicle object model is built by AVL CRUISE platform and inspect bus connection and model correctness,which laid the fou ndation for the development of key control strategies in this paper which lays a foundation for the development of the control strategy of this paper.A logic threshold control strategy is proposed b ased on the characteristics of PHEV power system.The motor drive-based control strategy and the optimized engine working interval-based control strategy are designed in the CD mode and CS mode.On this basis,a fuzzy logic controller with three inputs which are SOC,ΔSOC and ratio I and a output which is ratio O is designed.It has three inputs which are SOC,ΔSOC and ratio I and a output which is ratio O.Two control strategy models are built through Matlab/Simulink platform.Finally,the whole vehicle object model and control strategy model are used to establish the joint simulation of Interface mode.The dynamic performance and fuel economy of the logic threshold control strategy ar e simulated.The influence of preset travel on fuel economy is explored.The fuel economy of the two control strategies in different driving distance is compared and analyzed.The results show that the two control strategies achieve the design goals and the fuzzy logic control strategy has better robustness and fuel economy.更多还原