基于LabVIEW的HEV整车性能前向式仿真方法研究

前向式仿真能更准确地描述汽车在变外界条件下的动态响应过程,揭示输出与输入间的关系。本文建立了进行汽车性能前向仿真的微分方程组,并用LabVIEW编制了程序进行数值积分。仿真程序可用于进行纯发动机、纯电动机及PHEV汽车动力系统、传动系统的匹配及HEV控制策略的研究。程序中,将换挡的空挡间隔时间考虑进来。试验结果表明仿真精度可以接受,且换挡间隔时间在精确预测加速性能时不容忽略。

Study on LabVIEW-based Forward Simulation Method for HEV Performance

Forward simulation can more correctly describe,by contrast with backward simulation,how the automobile responses to outside inputs and reveal the relationships between inputs and outputs.The vehicle's movement and energy consumption were formulated into a differential equation group,and programs were made with LabVIEW to solve the equation group by numeric integration method.The developed program can be used to study control strategy,to match the power train for pure fuel engine vehicle,pure eclectic vehicle,and PHEV.Gear shift interval was considered in the simulation.After contrasting the simulation with the real measurement results,it can be concluded that simulation precision is acceptable and the gear shift interval shouldn't be ignored when precisely predicting accelerating performance.