TY - GEN
T1 - Constant Thrust Control Based on Double Threshold for Hovering at Asteroid Equilibrium Points
AU - Sui, Zhihui
AU - Feng, Junhua
AU - Li, Maodeng
AU - Zhu, Shengying
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/8
Y1 - 2020/8
N2 - This paper proposes a dual-threshold control method for constant thrust of hovering orbit at the unstable equilibrium point of an asteroid. Firstly, according to the orbital dynamics model of the probe, the nominal hovering orbit of the probe near the equilibrium point is determined. Then, according to the basic idea of threshold control, not only set the threshold at the current moment, but also predict the state of the future moment and set the threshold at that moment. Only when both thresholds are triggered at the same time does the constant thrust engine come into operation, which keeps the detector on the hovering track. Finally, simulation was performed with Eros433 as the target asteroid. The simulation results show that the method can effectively reduce the number of engines switching and operating time while maintaining a certain accuracy.
AB - This paper proposes a dual-threshold control method for constant thrust of hovering orbit at the unstable equilibrium point of an asteroid. Firstly, according to the orbital dynamics model of the probe, the nominal hovering orbit of the probe near the equilibrium point is determined. Then, according to the basic idea of threshold control, not only set the threshold at the current moment, but also predict the state of the future moment and set the threshold at that moment. Only when both thresholds are triggered at the same time does the constant thrust engine come into operation, which keeps the detector on the hovering track. Finally, simulation was performed with Eros433 as the target asteroid. The simulation results show that the method can effectively reduce the number of engines switching and operating time while maintaining a certain accuracy.
KW - Constant thrust
KW - Dual-threshold control
KW - Equilibrium points
KW - Nominal hover orbit
UR - http://www.scopus.com/inward/record.url?scp=85091596041&partnerID=8YFLogxK
U2 - 10.1109/CCDC49329.2020.9164142
DO - 10.1109/CCDC49329.2020.9164142
M3 - Conference contribution
AN - SCOPUS:85091596041
T3 - Proceedings of the 32nd Chinese Control and Decision Conference, CCDC 2020
SP - 5074
EP - 5078
BT - Proceedings of the 32nd Chinese Control and Decision Conference, CCDC 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 32nd Chinese Control and Decision Conference, CCDC 2020
Y2 - 22 August 2020 through 24 August 2020
ER -