Journal of System Simulation ›› 2022, Vol. 34 ›› Issue (10): 2264-2271.doi: 10.16182/j.issn1004731x.joss.21-0632

• Simulation Platform / System Technology • Previous Articles     Next Articles

Reinforcement-learning-based Adaptive Tracking Control for a Space Continuum Robot Based on Reinforcement Learning

Da Jiang1(), Zhiqin Cai1(), Zhongzhen Liu1, Haijun Peng1,2, Zhigang Wu2   

  1. 1.Dalian University of Technology, Dalian 116024, China
    2.State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian 116024, China
  • Received:2021-07-07 Revised:2021-09-12 Online:2022-10-30 Published:2022-10-18
  • Contact: Zhiqin Cai E-mail:ziangdar@sina.com;zhqcai@dlut.edu.cn

Abstract:

Aiming at the tracking control for three-arm space continuum robot in space active debris removal manipulation, an adaptive sliding mode control algorithm based on deep reinforcement learning is proposed. Through BP network, a data-driven dynamic model is developed as the predictive model to guide the reinforcement learning to adjust the sliding mode controller's parameters online, and finally realize a real-time tracking control. Simulation results show that the proposed data-driven predictive model can accurately predict the robot's dynamic characteristics with the relative error within ±1% to random trajectories. Compared with the fixed-parameter sliding mode controller, the proposed adaptive controller has a lower overshoot and shorter settling time and can achieve a better tracking performance.

Key words: space continuum robot, reinforcement learning, predictive control, sliding mode control, trajectory tracking

CLC Number: