The Journal of Korea Robotics Society (로봇학회논문지)

Korea Robotics Society (한국로봇학회)
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A Unified Framework for Overcoming Motion Constraints of Robots Using Task Transition Algorithm

작업 전이 알고리즘 기반 로봇 동작 제한 극복 프레임워크

  • Jang, Keunwoo (Graduate School of Convergence Science and Technology, Seoul National University) ;
  • Kim, Sanghyun (Graduate School of Convergence Science and Technology, Seoul National University) ;
  • Park, Suhan (Graduate School of Convergence Science and Technology, Seoul National University) ;
  • Park, Jaeheung (Graduate School of Convergence Science and Technology, Seoul National University, Advanced Institutes of Convergence Technology)
  • Received : 2018.02.06
  • Accepted : 2018.04.30
  • Published : 2018.05.31
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Abstract

This paper proposes a unified framework that overcomes four motion constraints including joint limit, kinematic singularity, algorithmic singularity and obstacles. The proposed framework is based on our previous works which can insert or remove tasks continuously using activation parameters and be applied to avoid joint limit and singularity. Additionally, we develop a method for avoiding obstacles and combine it into the framework to consider four motion constraints simultaneously. The performance of the proposed framework was demonstrated by simulation tests with considering four motion constraints. Results of the simulations verified the framework's effectiveness near joint limit, kinematic singularity, algorithmic singularity and obstacles. We also analyzed sensitivity of our algorithm near singularity when using closed loop inverse kinematics depending on magnitude of gain matrix.

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References

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