• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2022, Vol. 58 ›› Issue (3): 84-94.doi: 10.3901/JME.2022.03.084

Previous Articles     Next Articles

Force/Pose Impedance Control for Space Manipulator Orbit Insertion and Extraction

ZENG Chendong1,2, AI Haiping1,2, CHEN Li2   

  1. 1. College of Energy and Mechanical Engineering, Jiangxi University of Science and Technology, Nanchang 330013;
    2. College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116
  • Received:2021-02-06 Revised:2021-05-18 Online:2022-02-05 Published:2022-03-19

Abstract: It has become an inevitable trend to use space manipulator for orbit assembly, maintenance and fuel filling, and the insertion and extraction is the basis to achieve the above tasks. The impedance control problems for space manipulator orbit insertion and extraction are discussed. Firstly, the dynamic equation of system is derived when the pose of the carrier are not controlled, and the impedance control model is established based on the dynamic relationship between the pose, the driving force, and the impedance control principle. Then, aiming at the uncertainty of dynamics and the external disturbance, based on the event triggered mechanism, an event triggering sliding mode impedance control strategy is designed to control the space manipulator. The stability of the control system is proved through Lyapunov theory. The mechanism of the control strategy is:when the system is stable, the control input is not updated; when the system tends to be unstable, the control input is updated. For the control law does not need to be updated at all times, the amount of data transmitted and calculated in the system is less, it is more suitable for the limited computing and storage capacity of the space station computer. The numerical simulation verifies the effectiveness of the control strategy.

Key words: space manipulator, orbit, insertion and extraction, event triggering mechanism, sliding mode impedance control

CLC Number: