主办:陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊:1976年

Automobile Applied Technology ›› 2023, Vol. 48 ›› Issue (8): 46-52.DOI: 10.16638/j.cnki.1671-7988.2023.08.008

• New Energy Vehicle • Previous Articles     Next Articles

Shift Force Control of Electric Vehicle AMT Based on the Linear Quadratic Optimization Algorithm

GU Zhipeng, ZHU Tiefeng, GAO Zhihong, CHEN Mingxin   

  1. Department of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China
  • Online:2023-04-30 Published:2023-04-30
  • Contact: GU Zhipeng

基于线性二次最优算法的电动汽车 AMT 换挡力控制

谷志鹏,诸铁峰,高志鸿,陈明鑫   

  1. 北京工业大学 环境与生命学部,北京 100124
  • 通讯作者: 谷志鹏
  • 作者简介:谷志鹏(1996—),男,硕士研究生,研究方向为新能源汽车变速器,E-mail:guzhipeng_0016@163.com。

Abstract: To improve the shift smoothness of two gear automated mechanical transmission (AMT) of a pure electric vehicle, a detailed dynamic analysis of the shifting process of a two gear AMT without a clutch of an electric car is carried out, the linear quadratic regulator (LQR) optimal control algorithm is used to determine the optimal shift force in the synchronization stage, and the shift bench test is carried out. The test results show that under the premise of a small increase in shift time, and the peak value of transmission output shaft speed fluctuation is 48.4% lower than that without optimization, and the shift force optimal control based on LQR can effectively reduce the shift impact and improve the shift quality.

Key words: Electric vehicle; Synchronizer; AMT; LQR; Shift impact; Shift force control

摘要: 为提高纯电动汽车两挡自动变速器(AMT)的换挡平顺性,针对一款电动汽车无离合 器两挡 AMT 进行详细的换挡过程动力学分析,采用线性二次型调节器(LQR)最优控制算法 确定同步阶段的最优换挡力,进行换挡台架试验。试验结果表明,在换挡时间增幅不大的前 提下,变速器输出轴转速波动峰值较未优化时降低了 48.4%,基于 LQR 的换挡力最优控制能 够有效降低换挡冲击,改善换挡品质。

关键词: 电动汽车;同步器;AMT;LQR;换挡冲击;换挡力控制