系统仿真学报 ›› 2019, Vol. 31 ›› Issue (8): 1572-1581.doi: 10.16182/j.issn1004731x.joss.17-0269

• 仿真建模理论与方法 • 上一篇    下一篇

Scara机器人关节摩擦建模与补偿的实验与仿真

李琳, 林燕龙, 邹焱飚   

  1. 华南理工大学机械与汽车工程学院机械学系,广东 广州 510000
  • 收稿日期:2017-06-06 修回日期:2017-07-25 发布日期:2019-12-12
  • 作者简介:李琳(1962-),女,天津,博士,教授,硕导,研究方向为工业机器人、机器视觉。
  • 基金资助:
    国家科技重大专项资助项目(2015ZX04005 006-03),广东省科技重大专项(2014B090921004),广州市科技重大专项(2014Y2-00014)

Simulation and Experiment of Friction Modeling and Compensation of Scara

Li Lin, Lin Yanlong, Zou Yanbiao   

  1. College of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510000, China
  • Received:2017-06-06 Revised:2017-07-25 Published:2019-12-12

摘要: 针对关节摩擦力引起Scara机器人定位精度变差的问题,对机器人关节摩擦力进行建模、辨识和补偿。提出了一种可用于工作空间受限机器人的摩擦力辨识方法,使用Lugre摩擦模型对机器人关节摩擦力进行描述 ,通过让机器人跟踪正弦曲线,建立摩擦力矩与关节速度的映射关系, 并对其摩擦参数进行辨识。设计了自适应控制方法对机器人进行控制。利用Scara机器人进行实验验证与仿真,仿真结果表明辨识得到的摩擦参数具有较高的精度。实验结果表明所提出的自适应控制方法能有效提高机器人的关节定位精度和大幅减小机器人末端加速度。

关键词: LuGre摩擦模型, 摩擦参数辨识方法, 自适应控制, 定位精度, Scara机器人

Abstract: Due to the friction of joints, the localization accuracy of Scara robot is deteriorated. To deal with this problem, the friction of robot joints is modeled, identified and compensated. A method of identifying the friction force of robot working in limited working space is proposed. The Lugre friction model is used to describe the joint friction of the robots. By allowing the robot to track the sinusoidal curve, the relationship between the friction torque and the joint velocity is established, and the friction parameters are identified. The adaptive control method is proposed to control the robot. The experiment and simulation are carried out on Scara robot. Compared with the simulation results, which shows that the friction parameters identified have high accuracy. The experimental results show that the proposed adaptive control method can effectively improve the joint localization accuracy of the robot and significantly reduce the acceleration of robot end.

Key words: lugre friction model, method of friction parameters identification, adaptive control, positioning accuracy, scara robot

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