东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (6): 858-865.DOI: 10.12068/j.issn.1005-3026.2024.06.014

• 机械工程 • 上一篇    

具有不确定滑转的轮式移动机器人轨迹跟踪控制方法

吴昊, 梁忠超(), 王文成, 王永富   

  1. 东北大学 机械工程与自动化学院,辽宁 沈阳 110819
  • 收稿日期:2023-05-29 出版日期:2024-06-15 发布日期:2024-09-18
  • 通讯作者: 梁忠超
  • 作者简介:吴 昊(1999-),男,安徽滁州人,东北大学硕士研究生
    梁忠超(1984-),男,辽宁沈阳人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(52475007);中央高校基本科研业务费专项资金资助项目(N2403009)

Trajectory Tracking Control Method of Wheeled Mobile Robot with Uncertain Slippage

Hao WU, Zhong-chao LIANG(), Wen-cheng WANG, Yong-fu WANG   

  1. School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110819,China.
  • Received:2023-05-29 Online:2024-06-15 Published:2024-09-18
  • Contact: Zhong-chao LIANG
  • About author:LIANG Zhong-chao, E-mail: liangzc@me.neu.edu.cn

摘要:

轮式移动机器人在松软复杂地形条件下容易发生车轮滑转,影响轨迹跟踪精度.为提高机器人在该情况下的轨迹跟踪准确性,提出了一种基于容错控制的自适应滑转补偿控制器.首先,考虑车轮滑转率建立了四轮移动机器人运动学模型,并构建了相应的轨迹跟踪误差模型;然后,根据容错控制方法设计了滑转补偿项,并基于Lyapunov稳定性理论证明了自适应滑转补偿控制器的稳定性,实现了对由车轮滑转引起的速度误差的准确补偿;最后,利用四轮移动机器人进行了两种工况下的实验验证.结果表明,设计的控制器能够使移动机器人在未知的车轮滑转率条件下准确跟踪理想路径,并且相较于常规控制器有更强的鲁棒性和更高的跟踪精度.

关键词: 轮式移动机器人, 松软地形, 车轮滑转, 轨迹跟踪, 容错控制

Abstract:

Wheeled mobile robots are prone to wheel slippage on soft and complex terrains, which affects trajectory tracking accuracy. To improve the trajectory tracking accuracy of robots under such conditions, an adaptive slip compensation controller (ASCC) based on fault?tolerant control (FTC) is proposed. Firstly, a kinematic model of a four?wheeled mobile robot (4 WMR) is established by considering wheel slippage rates, and the corresponding trajectory tracking error model is constructed. Then, based on the FTC method, a slippage compensation term is designed. The stability of the ASCC is proven using Lyapunov stability theory, achieving accurate compensation for the velocity error caused by wheel slippage. Finally, experiments under two working conditions are conducted on the 4 WMR. The results show that the designed controller enables the mobile robot to track the desired path under unknown wheel slippage rates, and it exhibits stronger robustness and higher tracking accuracy compared to the conventional controllers.

Key words: wheeled mobile robot, soft terrain, wheel slippage, trajectory tracking, fault?tolerant control(FTC)

中图分类号: