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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2021, Vol. 42 ›› Issue (12): 324738-324738.doi: 10.7527/S1000-6893.2020.24738

• Electronics and Electrical Engineering and Control • Previous Articles     Next Articles

De-orbit strategy using Bang-Bang control for space tethered-combination

GUO Jia, PANG Zhaojun, YUE Shuai, DU Zhonghua   

  1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2020-09-11 Revised:2020-10-15 Published:2020-10-30
  • Supported by:
    National Natural Science Foundation of China (11802130,11802141), Natural Science Foundation of Jiangsu Province (BK20170819)

Abstract: To enable better task accomplishment of space tethered-combination in space debris removal, we propose a de-orbit strategy using Bang-Bang thrust, which is closer to the engineering application. Firstly, a Bang-Bang controller with differential clearance is used to realize the Bang-Bang thrust acceleration of space tethered-combination. In the process of de-orbit using Bang-Bang thrust, the engine needs to be switched on and off repeatedly. Therefore, a new passive winch mechanism is designed to avoid the negative effects of engine switching. A sliding mode controller with input constraints is designed for radial thrust to suppress the in-plane swing of the tether-combination in the process of de-orbit, and the control is also realized by Bang-Bang thrust. The simulation results show that Bang-Bang thrust can achieve similar results with continuous thrust that suppress the in-plane swing angle in a narrow range. The de-orbit strategy can make space tethered-combination complete the mission that drag space debris to graveyard orbit on the basis of ensuring the attitude stabilization control.

Key words: space debris removal, tether-tugging de-orbit, de-orbit strategy, Bang-Bang thrust, space tethered-combination

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