应用2自由度电磁执行器的AMT换挡控制  

Gearshift Control for AMT Based on a 2-DOF Electromagnetic Actuator

作　　者：林树森[1] 常思勤[1] 李波[1] 

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《农业机械学报》2014年第4期14-21,共8页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(51207071;51306090);江苏省科技支撑计划资助项目(BE2008133)

摘　　要：为提高机械式自动变速器(AMT)换挡品质,研究一种应用2自由度电磁执行器的AMT换挡系统。阐述了执行器的工作原理,建立了执行器电路、磁路、机械耦合的仿真模型,并对其进行了性能测试。执行器可输出1 200 N的电磁力和2.5 N·m的转矩,并具有较快的动态响应。将AMT换挡过程分成4段,在同步过程中建立换挡品质综合最优的目标泛函,采用最优控制使换挡性能达到最佳。设计了退选挡时序重叠协调控制方法。研制了换挡控制器并完成试验,结果显示在转动惯量为0.03 kg·m2、转速差为620 r/min时换挡,选挡时间17.8 ms,换挡时间为135 ms,冲击度为3.68 m/s3,单位面积滑磨功0.077 J/mm2。退选挡时序重叠协调控制可减少换挡时间11 ms。试验结果表明,结合设计的控制策略,该AMT换挡系统取得了较好的换挡性能。To improve the shifting quality of the automated manual transmission（AMT）,a type of AMT gearshift system based on a 2-DOF electromagnetic actuator was developed.A coupling system model including electric,magnetic circuit and mechanics was built.The characteristics were investigated through tests.The output force was more than 1 200 N and the maximum output torque was 2.5 N·m, which showed that the dynamic response was relatively fast.The gearshift process was divided into four phases.During the synchronization process,an optimal objective function of shift quality indexes was developed and the optimal control was adopted to achieve the optimal shift quality.The shift sequence coordinated control of shift out and gear selection was introduced,and the gearshift controller was designed and tested.When the equivalent inertia was 0.03 kg·m^2and the speed difference was 620 r/min,the results showed that the shift time was 135 ms,the impact was 3.86 m/s^3,and the friction work per unit was 0.077 J/mm2.The coordinated control method could be reduced to 11 ms.The test results indicated that,combined with the designed control strategy,the novel gearshift system achieved good shift performance.

关 键 词：2自由度电磁执行器 机械式自动变速器 同步过程 最优控制 

分 类 号：U463.212.33[机械工程—车辆工程]