电控机械式自动变速器时序重叠换挡系统设计与研究

Design and Research on Time-overlapping Gearshift Systems for AMTs

为解决电控机械式自动变速器(AMT)动力中断时间过长的问题,研制了一种基于电磁直线执行器的时序重叠换挡系统。介绍了关键部件电磁直线执行器的结构和工作原理,建立了机、电、磁耦合的系统模型,并通过实验进行了性能分析。提出了时序重叠换挡的控制策略,基于二自由度控制原理设计了位置复合控制器。仿真和实验结果表明,提出的位置复合控制器具有较好的系统响应和扰动抑制特性;在转速差为500 r/min、被同步惯量为0.01 kg·m2条件下,采用时序重叠换挡方式由2挡换至3挡的换挡时间约为130 ms,时序重叠控制减少时间约20 ms,换挡时间缩短15%以上。

In order to shorten the power interruption duration of AMT,a time-overlapping gearshiftsystem was developed based on the electromagnetic linear actuators. The structures and working principles ofthe electromagnetic linear actuators were presented. A coupling system model including mechanical,electriccircuit and magnetic circuit subsystems was built. The characteristics of the actuator were analyzed byexperiments. The time-overlapping control strategy was presented,and the position compound controller wasdesigned based on the two-degree-of-freedom control principle. The simulation and experimental results showthat the proposed position cascade controller achieves good response and disturbance rejection performance.When the speed difference is as 500 r/min and the synchronized equivalent inertia is as 0.01 kg·m2,gear-change from 2 nd to 3 rd,the time is about 130 ms,the time-overlapping control method has about 20 mstime-saving,and the total time is reduced by more than 15%.