两挡AMT无动力中断换挡协调控制研究  

Study on Coordinated Control Strategy for Seamless Gear Shifting of Two-speed AMT

作　　者：王明[1] 盛继新 丁飞[1] 张邦基[1] 文桂林[1] 张农[1] WANG Ming;SHENG Jixin;DING Fei;ZHANG Bangji;WEN Guilin;ZHANG Nong(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,China;SAIC Volkswagen Automotive Co Ltd,Shanghai 201805,China)

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]上汽大众汽车股份有限公司,上海201805

出　　处：《湖南大学学报（自然科学版）》2019年第8期20-27,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(U1234208,51621004);湖南省芙蓉学者计划项目(XJT2015408);汽车车身先进设计制造国家重点实验室自主项目(71575005)~~

摘　　要：针对一种纯电动汽车用离合器后置式二挡机械式自动变速器(AMT),提出将同步器布置于变速器第二轴的方案,通过离合器和同步器的切换控制实现无动力中断换挡.为使换挡过程中变速器输出扭矩变化平顺,综合考虑冲击度与滑摩功等换挡性能指标,针对换挡过程的不同阶段,采用相应的换挡协调控制策略:扭矩相时驱动电机扭矩保持不变,同时协调控制离合器扭矩;惯性相时分别采用PID、自适应模糊PID控制电机扭矩使离合器转速差跟踪目标轨迹.基于Matlab/Simulink建立整车纵向动力学模型并进行仿真试验.结果表明:所制定的换挡协调控制策略是有效的,相较于惯性相时采用PID控制离合器转速差,采用自适应模糊PID控制能有效改善换挡品质,换挡过程中最大冲击度和滑摩损失都有所减小,变速器输出扭矩变化平顺无动力中断,整车舒适性有较大提高.For an Automated Manual Transmission(AMT)with clutch inversed for the pure electric vehicle,this paper presented a program that the synchronizer of the AMT was located on the second axis.The seamless gear shifting can be obtained by switching the clutch to the synchronizer.In order to make the output torque of gearbox change smoothly,addressing the vehicle jerk and friction work as the shift performance indexes,different coordinated control strategies were adopted for different stages during shifting:the motor torque remained unchanged in the torque phase,and the clutch torque was controlled coordinately;the speed difference of the clutch was controlled following the target trajectory by motor speed controlled by PID and adaptive fuzzy PID method in the inertial phase. The dynamic model of MATLAB / Simulink was established and simulated, which showed the feasibility and effectiveness of the coordinated control strategy for gear shifting. Compared with the traditional PID controller applied in the inertial phase, the adaptive fuzzy PID controller can effectively improve the shift quality, the max jerk during gear shift and the friction work decreased, the output torque of the transmission changed seamlessly without power interruption, and the comfort of the vehicle was significantly improved.

关 键 词：电动汽车 AMT 换挡 无动力中断 自适应模糊PID控制 协调控制 

分 类 号：TH132.41[机械工程—机械制造及自动化]