Journal of Applied Sciences ›› 2025, Vol. 43 ›› Issue (3): 530-540.doi: 10.3969/j.issn.0255-8297.2025.03.013

• Control and System • Previous Articles    

Predefined-Time Trajectory Tracking Control for Dual-Arm Space Robot

HONG Mengqing1,2, WANG Qun1,2, LIU Jiayin1,2   

  1. 1. Department of Computer Information and Cyber Security, Jiangsu Police Institute, Nanjing 210031, Jiangsu, China;
    2. Jiangsu Electronic Data Forensics and Analysis Engineering Research Center, Jiangsu Police Institute, Nanjing 210031, Jiangsu, China
  • Received:2024-03-04 Online:2025-05-30 Published:2025-06-23

Abstract: A predefined-time nonsingular sliding mode control method is proposed to address the issue of end-effector trajectory tracking for a free-floating dual-arm space robot subjected to unknown external disturbances, ensuring the end-effectors reach a stable state within predefined time. Firstly, the dynamic model of the dual-arm space robot is established using the Lagrange method. Furthermore, based on the theory of predefined time stability, a predefined-time nonsingular sliding mode surface is designed. The sliding mode surface not only allows for the pre-setting of system stabilization time, but also effectively avoids the singularity issues associated with predefined-time control. The stability of the closed-loop control system has been proven through the Lyapunov function method. Finally, simulation experiments conducted on a planar two-joint dual-arm space robot validate the effectiveness of the proposed control algorithm.

Key words: dual-arm space robot, end-effector, trajectory tracking, predefined-time control, nonsingular sliding mode control

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