纯电动汽车AMT换挡时间和冲击优化控制策略
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摘要
为了提高自动机械变速器(AMT)电动汽车舒适性,研究了AMT在换挡过程中的冲击问题,其本质原因是换挡电机控制不当导致同步器转速不到位.利用Adams和dSPACE等采集数据并分析问题产生机理,通过Meca标定软件标定控制参数,确定了最优PWM指令,减小了换挡末期的冲击,缩短了换挡时间和动力中断时间,提高了汽车乘坐舒适性和安全性.通过分段PWM控制标定和协同统一的换挡模式,冲击和换挡时间均可降低20～30%.在同步器结构不变的条件下,这种方法可以有效优化换挡时间和冲击.
In order to improve the comfort of the automatic mechanical transmission(AMT) electric vehicle, the impact of the AMT was studied during the shifting process. The essential reason is that the shift motor control is not appropriate, which leads to the synchronizer speed is not suitable. Data was collected and the problem generation mechanism was analysed by using Adams and dSPACE. Meca calibration software is used to calibrate the control parameters and determine the optimal PWM, which not only reduces the jerk at the end of the shift, but also shortens the shift time and power interruption time,improves the comfort and safety of vehicles. Both the jerk and the shift time are reduced by 20～30% through the segmented PWM control calibration and coordinated shift mode. This method can effectively optimize shift time and jerk when the synchronizer structure is unchanged.
In order to improve the comfort of the automatic mechanical transmission(AMT) electric vehicle, the impact of the AMT was studied during the shifting process. The essential reason is that the shift motor control is not appropriate, which leads to the synchronizer speed is not suitable. Data was collected and the problem generation mechanism was analysed by using Adams and dSPACE. Meca calibration software is used to calibrate the control parameters and determine the optimal PWM, which not only reduces the jerk at the end of the shift, but also shortens the shift time and power interruption time,improves the comfort and safety of vehicles. Both the jerk and the shift time are reduced by 20～30% through the segmented PWM control calibration and coordinated shift mode. This method can effectively optimize shift time and jerk when the synchronizer structure is unchanged.
引文
[1] 席军强,王雷,付文清,等.纯电动客车自动机械变速器换挡过程控制[J].北京理工大学学报,2010,30(1):42-45.
[2] 朱文燕.纯电动汽车的发展现状及性价比.市场经济与价格[J].2016,12(8):16-19.
[3] 胡建军,李康力,胡明辉,等.纯电动轿车AMT换挡过程协调匹配控制方法.中国公路学报[J].2012,25(1):152-158.
[4] 王阳,席军强,陈慧岩.AMT换挡冲击产生机理与对策研究.汽车工程[J].2009,31(3):253-257.
[5] 刘拂晓,赵韩,江昊,等.纯电动汽车AMT换挡规律及仿真研究[J].合肥工业大学学报(自然科学版).2013,36(11):1281-1284.
[6] 张承宁,武小花,王志福,等.电动车辆AMT换挡过程中驱动电机控制策略.北京工业大学学报[J].2012,38(3):325-329.
[7] 刘正伟.电动客车无同步器AMT换挡过程控制研究[D].吉林:吉林大学,2017.
[2] 朱文燕.纯电动汽车的发展现状及性价比.市场经济与价格[J].2016,12(8):16-19.
[3] 胡建军,李康力,胡明辉,等.纯电动轿车AMT换挡过程协调匹配控制方法.中国公路学报[J].2012,25(1):152-158.
[4] 王阳,席军强,陈慧岩.AMT换挡冲击产生机理与对策研究.汽车工程[J].2009,31(3):253-257.
[5] 刘拂晓,赵韩,江昊,等.纯电动汽车AMT换挡规律及仿真研究[J].合肥工业大学学报(自然科学版).2013,36(11):1281-1284.
[6] 张承宁,武小花,王志福,等.电动车辆AMT换挡过程中驱动电机控制策略.北京工业大学学报[J].2012,38(3):325-329.
[7] 刘正伟.电动客车无同步器AMT换挡过程控制研究[D].吉林:吉林大学,2017.