汽车工程 ›› 2019, Vol. 41 ›› Issue (3): 327-333.doi: 10.19562/j.chinasae.qcgc.2019.03.013

• • 上一篇    下一篇

分布式驱动电动汽车复合制动系统转矩分配控制策略仿真*

杜荣华1,2,米思雨2,3,胡林2,3,孟灿2,3   

  1. 1.长沙理工大学智能交通与车路协同技术研究所,长沙 410114;
    2.长沙理工大学汽车与机械工程学院,长沙 410114;
    3.长沙理工大学,工程车辆安全性设计与可靠性技术湖南省重点实验室,长沙 410114
  • 收稿日期:2018-01-15 出版日期:2019-03-25 发布日期:2019-03-25
  • 通讯作者: 杜荣华,教授,博士,E-mail:csdrh@163.com
  • 基金资助:
    国家自然科学基金(11272067)和湖南省自然科学基金(2016JJ2006)资助

Simulation on Control Strategy for Torque Distribution of Compound Brake System in a Distributed Drive Electric Vehicle

Du Ronghua1,2, Mi Siyu2,3, Hu Lin2,3 & Meng Can2,3   

  1. 1.Institute of Intelligent Traffic and Cooperative Vehicle-Infrastructure Systems, Changsha University of Science and Technology, Changsha 410114;
    2.School of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114;
    3.Changsha University of Science and Technology, Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha 410114
  • Received:2018-01-15 Online:2019-03-25 Published:2019-03-25

摘要: 针对分布式驱动电动汽车,提出了一种复合制动系统控制策略。采用分层的制动转矩分配控制结构,上层控制器采用滑模控制策略,对目标纵向力和横摆力矩进行求解,以满足车辆在制动时制动效能和制动稳定性的要求;下层控制器采用加权最小二乘控制,对四轮液压制动转矩和电机制动转矩进行分配,通过增大电机制动力分配的权值达到能量回收的最大化,并采用有效集算法完成目标函数的求解。在此基础上,在Simulink中建立了7自由度整车动力学模型,在对开路面的工况下进行了仿真分析,结果表明:所制定的控制策略能满足要求,在保证车辆制动稳定性的同时,最大限度回收制动能量。

关键词: 分布式驱动电动汽车, 复合制动系统, 转矩分配, 制动稳定性

Abstract: Aiming at a distributed drive electric vehicle, a control strategy for compound brake system is proposed in this paper. A hierarchical braking torque allocation control structure is adopted, in which the upper controller uses the sliding mode control strategy to solve out the target longitudinal force and yaw moment for meeting the requirements of braking efficacy and stability. The lower controller allocates the hydraulic braking torque of four wheels and the motor braking torque with weighted least square control, maximizes energy recovery by increasing the weight of motor braking force allocation and solves the objective function by using effective set algorithm. On this basis, a seven-DOF vehicle dynamics model is established with Simulink, and a simulation is carried out under the condition of butted-joint road. The results show that the control strategy proposed can meet the requirements, maximizing the recovery of braking energy while ensuring the braking stability of vehicle

Key words: distributed drive electric vehicle, compound brake system, torque distribution, braking stability