基于模糊逻辑的SHEV控制策略设计与仿真

针对一辆串联式混合动力电动汽车设计了一种基于模糊逻辑的控制策略,根据蓄电池组荷电状态(SOC)及车辆需求功率的变化实时调整发动机输出功率,以实现恒SOC控制,同时兼顾发动机燃油消耗及排放.给出了模糊控制器的结构,建立了车辆前向仿真模型,进行了离线仿真及硬件在环仿真.仿真结果表明,模糊控制策略能够较好将蓄电池组SOC维持在期望值0.7附近,且发动机可以稳定地工作在其高效率区以获得较低的燃油消耗及排放.

Design and Simulation of Fuzzy Logic Control Strategy for an SHEV

A control strategy based on fuzzy logic is proposed for a series hybrid electric vehicle.According to the stat-of-charge of batteries and the power required by the vehicle,the engine output power is real-time changed to realize constant SOC control,and the fuel consumption and emissions are considered as well.The architecture of the vehicle controller is given and a forward simulation model for the vehicle is established.Both off-line and hardware-in-loop simulations are performed.Simulation results show that the fuzzy logic control strategy can maintain the SOC of batteries nearby the exceptive value 0.7,and the engine works at its high efficiency area to get low fuel consumption and emissions.