In this paper, a fixed-time repetitive learning control scheme is proposed for uncertain rigid robot manipulators. Different from the existing fixed-time control schemes, a simple nonsingular fixed-time virtual controller is constructed to directly avoid the singularity caused by the differentiation of the virtual controller. Then, a robust control law is developed to guarantee the effective compensation of the left non-periodic uncertainty. With the proposed control scheme, the fixed-time error convergence in the transient process and high precision tracking performance in the steady-state process can be both guaranteed simultaneously. Simulation results on a two-link robot manipulator verify the validity of the proposed method.

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

Fixed-Time Repetitive Learning Control for Uncertain Robotic Manipulators

  • Yaqian Li,
  • Shouqin Wang,
  • Huihui Shi,
  • Qiang Chen

摘要

In this paper, a fixed-time repetitive learning control scheme is proposed for uncertain rigid robot manipulators. Different from the existing fixed-time control schemes, a simple nonsingular fixed-time virtual controller is constructed to directly avoid the singularity caused by the differentiation of the virtual controller. Then, a robust control law is developed to guarantee the effective compensation of the left non-periodic uncertainty. With the proposed control scheme, the fixed-time error convergence in the transient process and high precision tracking performance in the steady-state process can be both guaranteed simultaneously. Simulation results on a two-link robot manipulator verify the validity of the proposed method.