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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (5): 422587-422587.doi: 10.7527/S1000-6893.2018.22587

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Tumbling target despun based on robotic flexible brush

WU Hao1, SUN Shengxin1, WEI Cheng1, ZHANG Haibo2, ZHAO Yang1   

  1. 1. School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;
    2. Beijing Institute of Control Engineering, Beijing 100000, China
  • Received:2018-08-01 Revised:2018-09-03 Online:2019-05-15 Published:2019-01-04
  • Supported by:
    Open Fund of National Defense Key Discipline Laboratory of Micro-Spacecraft Technology (HIT.KLOF.MST.201703); Open Fund of Science and Technology on Space Intelligent Control Laboratory (ZDSYS-2017-07)

Abstract: A despun mechanism for a flexible deceleration brush is designed and installed at the end of the seven-degree-freedom robotic arm. Despun is achieved through a contact collision with the tumbling target sailboard. A dynamic model for the flexible deceleration brush is derived by using the absolute nodal coordinate formulation, and the contact collision of the brush is analyzed. The dynamic modeling of the free-floating space robot and the control of the base attitude are studied. By using the sliding mode control based on the computed torque method, a seven-degree-freedom robotic arm with uncertain terminal parameters is controlled. The sliding mode control has the characteristics of fast response and in-sensitivity to parameter changes and disturbance, ensuring the global robustness and stability of the system. It is beneficial to reduce the despun time and improves the efficiency of the despun. The results of despun simulation of PD control and sliding mode control show that the strategy can successfully eliminate the initial rotation speed. The degree of despun is over 90%, which is feasible and effective.

Key words: flexible deceleration brush, despun, sliding mode control, free-floating space robot, tumbling target

CLC Number: