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机械臂的改进固定时间滑模控制方法设计

吴定会 肖仁 欧阳洪才 张秀丽

吴定会, 肖仁, 欧阳洪才, 张秀丽. 机械臂的改进固定时间滑模控制方法设计[J]. 机械科学与技术, 2021, 40(8): 1171-1176. doi: 10.13433/j.cnki.1003-8728.20200247
引用本文: 吴定会, 肖仁, 欧阳洪才, 张秀丽. 机械臂的改进固定时间滑模控制方法设计[J]. 机械科学与技术, 2021, 40(8): 1171-1176. doi: 10.13433/j.cnki.1003-8728.20200247
WU Dinghui, XIAO Ren, OUYANG Hongcai, ZHANG Xiuli. Design of Improved Fixed Time Sliding Mode Control Method for Manipulator Trajectory Tracking[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(8): 1171-1176. doi: 10.13433/j.cnki.1003-8728.20200247
Citation: WU Dinghui, XIAO Ren, OUYANG Hongcai, ZHANG Xiuli. Design of Improved Fixed Time Sliding Mode Control Method for Manipulator Trajectory Tracking[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(8): 1171-1176. doi: 10.13433/j.cnki.1003-8728.20200247

机械臂的改进固定时间滑模控制方法设计

doi: 10.13433/j.cnki.1003-8728.20200247
基金项目: 

国家自然科学基金项目 61572237

江苏省研究生科研实践创新计划项目 SJCX18_0643

详细信息
    作者简介:

    吴定会(1970-), 教授, 博士, 研究方向为机器人控制及嵌入式, wdh123@jiangnan.edu.cn

  • 中图分类号: TP241.2

Design of Improved Fixed Time Sliding Mode Control Method for Manipulator Trajectory Tracking

  • 摘要: 当机械臂末端对给定轨迹进行跟踪控制时,跟踪误差收敛速度容易受初始跟踪误差大小的影响,针对这一问题设计了一种适用于机械臂模型的改进固定时间滑模轨迹跟踪控制策略。在快速终端滑模面的基础上,设计了一种固定时间滑模面,从而使得控制器具有固定时间收敛特性并给与证明;针对滑模控制伴随抖震的特性,对滑模控制器的趋近律进行了抑制抖振的改进,使得趋近律具有一定的自适应性。通过对二自由度机械臂的仿真实验,验证了在系统含有未知扰动的情况下,设计的改进固定时间滑模控制器能够在固定时间内使得机械臂末端轨迹跟踪误差快速收敛,且通过控制器参数的调整能够达到更快的收敛速率。通过仿真对比,验证了论文设计方法的收敛速率要快于快速终端滑模控制方法。
  • 图  1  N=1时机械臂关节角度轨迹跟踪

    图  2  N=2时机械臂关节角度轨迹跟踪

    图  3  N=3时机械臂关节角度轨迹跟踪

    图  4  机械臂关节1角度轨迹误差对比

    图  5  机械臂关节2角度轨迹误差对比

    图  6  机械臂关节1角度轨迹误差收敛

    图  7  机械臂关节2角度轨迹误差收敛

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出版历程
  • 收稿日期:  2019-12-28
  • 刊出日期:  2021-10-09

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