汽车工程 ›› 2018, Vol. 40 ›› Issue (9): 1040-1047.doi: 10.19562/j.chinasae.qcgc.2018.09.006

• • 上一篇    下一篇

基于模型预测控制的混合动力汽车模式切换中的转矩协调控制策略*

张渊博,王伟达,项昌乐,黄琨,马越,魏超,李子龙   

  1. 北京理工大学机械与车辆学院,北京 100081
  • 收稿日期:2018-07-19 出版日期:2018-09-25 发布日期:2018-09-25
  • 通讯作者: 王伟达,副教授,E-mail:wangwd0430@163.com
  • 基金资助:
    国家自然科学基金(U1564210,U1764257和51575043)资助

A Model Predictive Control-based Torque Coordinated Control Strategy for Hybrid Electric Vehicle During Mode Shifting

Zhang Yuanbo, Wang Weida, Xiang Changle, Huang Kun, Ma Yue, Wei Chao & Li Zilong   

  1. School of Mechanical Engineering,Beijing Institute of Technology, Beijing 100081
  • Received:2018-07-19 Online:2018-09-25 Published:2018-09-25

摘要: 混合动力车辆有多种工作模式,在模式切换过程中,由于系统的不连续性等特性,会出现平顺性差等问题。为此,本文中以双模混联式机电复合传动为对象,以改善模式切换品质为目的,重点进行离合器接合过程控制策略的研究。首先,对机电复合传动总体结构和特性进行了分析,并建立了功率耦合系统的等效模型;接着,提出了以减小车辆冲击度和离合器滑摩功为目标的基于模型预测控制的转矩协调控制策略;最后,利用仿真模型,对转矩协调控制策略进行了验证。结果表明,机电复合传动在所提出的模式切换控制策略的作用下,能在保证模式切换响应速度更快的同时,有效地降低输出轴的转矩波动和车辆的冲击度,减小离合器的滑摩损失,因此极大地改善了模式切换品质,对工程实践具有一定的参考价值。

关键词: 混合动力汽车, 模型预测控制, 模式切换

Abstract: Hybrid electric vehicle (HEV) has multiple working modes and due to the features of system discontinuity, the problems such as poor smoothness arise during mode switching. Accordingly, taking dual-mode series-parallel electromechanical compound transmission system as object, with improving mode switching quality as objective, the control strategy for clutch engagement process is emphatically studied in this paper. Firstly, the overall structure and characteristics of electromechanical compound transmission are analyzed, and the equivalent model for power coupling system is established. Then, a model predictive control-based control strategy for torque coordination is proposed with reducing vehicle jerk and the sliding-friction work of clutch as objective. Finally, the torque coordinated control strategy is verified with simulation model. The results indicate that with the mode switching control strategy proposed, the electromechanical compound transmission system can effectively reduce the torque ripple of output shaft and vehicle jerk, decrease the sliding friction loss of clutch, and hence greatly improve the quality of mode switching, while ensuring faster response of mode switching, having a certain reference value for engineering practice

Key words: HEV, model predictive control, mode switching