• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2023, Vol. 59 ›› Issue (23): 76-86.doi: 10.3901/JME.2023.23.076

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Nonsingular Terminal Sliding Mode Adaptive Control for Unmanned Aerial Manipulator in Gliding Grasping

CHEN Yanjie1, YU Jianye1, ZHANG Zhenguo2, ZHONG Hang3, ZHANG Hui3, WANG Yaonan2   

  1. 1. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108;
    2. College of Electrical and Information Engineering, Hunan University, Changsha 410082;
    3. School of Robotics, Hunan University, Changsha 410082
  • Received:2022-12-01 Revised:2023-07-14 Published:2024-02-20

Abstract: Unmanned aerial manipulator (UAM) is a new type of robotic system equipping with active operation mechanism, which has the ability to physically interaction with environments. Aiming at the problem of stable control when the UAM dynamic grasping, a nonsingular terminal sliding mode adaptive controller with an auxiliary system is proposed to improve the anti-disturbance property of the UAM facing to unpredictable contact force. The Newton-Euler method is adopted to establish the dynamics model of the UAM. Considering the instantaneous contact force between the end tip of the onboard manipulator and the object is the main disturbance source in grasping, the contact force model based on dynamics is established by using impulse theorem to improve modeling accuracy when UAM dynamic grasping. To reduce the influence of violent disturbance on flight control performance during dynamic grasping, an auxiliary system is proposed in the controller to compensate for the possible input saturation, enhancing the ability to deal with instantaneous disturbances. The stability of the proposed method is analyzed by Lyapunov theory. The simulation and experimental results show that the proposed method has advantages of strong stability and rapid response for UAM dynamic grasping.

Key words: unmanned aerial manipulator, dynamic grasping, nonsingular terminal sliding mode adaptive control, input saturation

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