汽车工程 ›› 2021, Vol. 43 ›› Issue (1): 68-76.doi: 10.19562/j.chinasae.qcgc.2021.01.009

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基于视觉识别的线控制动压力滑模控制

邱明明1,2(),曹龙凯1,黄康1,2,张义雷1,刘浩1   

  1. 1.合肥工业大学机械工程学院,合肥   230009
    2.汽车技术与装备国家地方联合工程研究中心,合肥   230009
  • 收稿日期:2020-01-13 修回日期:2020-07-07 出版日期:2021-01-25 发布日期:2021-02-03
  • 通讯作者: 邱明明 E-mail:hfutqmm@hfut.edu.cn
  • 基金资助:
    国家重点研发计划项目(2017YFB0103204);中央高校基本科研业务费专项资金项目(PA2019GDZC0101)

Brake by Wire Pressure Sliding Mode Control Based on Visual Recognition

Mingming Qiu1,2(),Longkai Cao1,Kang Huang1,2,Yilei Zhang1,Hao Liu1   

  1. 1.School of Mechanical Engineering,Hefei University of Technology,Hefei 230009
    2.National and Local Joint Engineering Research Center for Automotive Technology and Equipment,Hefei 230009
  • Received:2020-01-13 Revised:2020-07-07 Online:2021-01-25 Published:2021-02-03
  • Contact: Mingming Qiu E-mail:hfutqmm@hfut.edu.cn

摘要:

制动安全是车辆主动安全的关键技术之一。制动决策和执行器控制是影响线控制动系统性能的两个主要因素。路面自适应性和控制器鲁棒性分别对制动决策和执行器控制有着重要影响,制约着线控制动系统的发展。本文中以一种液压调控的线控制动系统为基础,针对路面自适应性和控制器鲁棒性问题,提出一种双层结构的制动系统控制器,上层采用计算机视觉的方法对路面类型进行识别,根据识别结果制定当前路面的最佳滑移率;下层针对制动系统参数不确定性问题,引入滑模控制理论对制动过程中的最佳滑移率进行跟踪控制。通过仿真与实验验证,结果表明,双层结构的制动系统控制器相比传统控制器,路面的自适应性好,制动距离更短,控制器鲁棒性好。

关键词: 计算机视觉, 双层结构控制器, 路面自适应, 线控制动, 压力控制

Abstract:

Brake safety is one of the key technologies for vehicle active safety. Braking decision and actuator control are two main factors that affect the performance of the brake by wire system. Road surface adaptability and controller robustness have important influence on braking decision and actuator control respectively, restricting the development of brake by wire system. In this paper, based on a hydraulic brake by wire system, a double-layer structure brake system controller is proposed to solve the problems of road surface adaptability and controller robustness. The upper layer uses computer vision to identify the type of road surface, and formulates the optimal slip rate of the current road surface according to the recognition result; the lower layer introduces the sliding mode control theory in track and control of the optimal slip rate during the braking process to solve the problem of brake system parameters uncertainty. Through simulation and experimental verification, the results show that the double-layer structure brake system controller has better road surface adaptability, shorter braking distance and better controller robustness than the traditional controller.

Key words: computer vision, double-layer structure controller, road surface adaptation, brake by wire, pressure control