摘要
为了实现液驱混合动力汽车驾驶模式稳定平顺的切换,依靠驱动转矩的原则,设计了混合动力汽车驾驶模式自动切换控制系统。以S32V25核心控制芯片和MPC5788导入芯片分别制备驾驶控制器ACU和传导控制器VCU,组成系统电子控制整体架构,制备CVT变速控制模型,获取当前CVT变速箱的总速度比。制备纯电动电机控制模型,对应汽车纯电动力模式,根据当前纯电动电机输出特性获取后桥转机转矩,作为该模式下的纯原电力输出,根据车辆滑移率与路面附着关系,对当前控制下的最优滑移率进行在线辨识,基于滑移率的追踪控制,制备行驶控制器,提高行驶稳定性,根据发动机前桥和后桥转矩,推导最终输出转矩结果,比较其相似性,完成驾驶模式的平滑切换。仿真结果表明,应用该控制系统后,模式变幻时整车驱动转矩基本相同,可以实现混合动力汽车驾驶模式的平顺切换。
In order to realize the stable and smooth switching of driving mode of liquid-driven hybrid electric vehicle,the automatic switching control system of driving mode of hybrid electric vehicle is designed basedontheprincipleofdrivingtorque.DrivingcontrollerACU andconductioncontrollerVCU areprepared by using S32 V25 core controlchip and MPC5788 inputchip respectively,which constitute the whole system electronic control architecture,prepare CVT variable speed control model,and obtain the total speed ratio of current CVT gearbox.Preparation of pure electric motor control model,the corresponding pure electric car model,based on the current transfer output characteristic for rear axle torque electric motor,as the mode of pure original power output,and tire-road friction,the vehicle slip ratio for the current under the control of online identification for the optimal slip ratio,tracking based on slip ratio control,preparation of driving controller,improve the stability,according to the engine front axle and rear axle torque,final output torque is derived as a result,compare their similarity,complete the smooth driving mode switch.The simulation results show that the driving torque of the vehicle is basically the same when the control system is applied,and the smooth switching of the driving mode of hybrid electric vehicle can be achieved.
作者
陈鹏
CHEN Peng(Shaanxi College of Communication Technology,Xi’an 710018,China)
出处
《电子设计工程》
2020年第7期165-168,176,共5页
Electronic Design Engineering
基金
2019年中国管理科学研究院教育科学研究所课题(JKS1105)。
