北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (3): 55-59.doi: 10.13190/jbupt.200903.55.cheng

• 论文 • 上一篇    下一篇

连续三轴平行机器人的避奇异规划

陈钢 贾庆轩 孙汉旭 洪磊   

  1. 北京邮电大学自动化学院 北京邮电大学自动化学院 北京邮电大学自动化学院 北京邮电大学自动化学院
  • 收稿日期:2008-11-03 修回日期:2009-04-16 出版日期:2009-06-28 发布日期:2009-06-28
  • 通讯作者: 陈钢

Planning on avoiding singularity for the robot with the structure of three consecutive parallel axes

  • Received:2008-11-03 Revised:2009-04-16 Online:2009-06-28 Published:2009-06-28

摘要:

针对具有连续三轴平行结构的六自由度机器人,提出一种新的回避奇异的方法。通过分析机器人雅可比矩阵的结构,对雅可比矩阵进行改造;将六维的雅可比矩阵分割成两个三维雅可比矩阵。在此基础上,确定了机器人发生奇异的条件;并利用二次规划实现了机器人的避奇异;最后,通过实验验证了该算法的适用性,并与现有的最小阻尼方差等方法进行了比较,有较大的优越性。

关键词: 避奇异, 矩阵分割, 二次规划, 三轴平行

Abstract:

A new method to avoid the singularity is presented for the 6-Dof robot with the structure of three consecutive parallel axes. By analyzing the robot Jacobian matrix structure and rebuilding the Jacobian matrix, the six-dimensional Jacobian matrix is divided into two three-dimensional Jacobian matrixes. On this basis, the conditions of robot singularity occurrence are determined and the robot avoiding the singularity is achieved by using quadratic programming. Finally, the algorithm effectiveness is validated by the experiment. The comparison between the quadratic programming method and the existing Damped least-squares method is manifested and the former is superior.

Key words: avoiding singularity, matrix partitioning, quadratic programming, three consecutive parallel axes