Abstract
A floating partial space elevator (PSE) is a PSE with a floating main satellite. This work aims to keep the orbital radius of the main satellite of a floating PSE in cargo transposition without the use of thrusts. A six-degree-of-freedom two-piece dumbbell model was built to analyze the dynamics of a floating PSE. By adjusting the climber’s moving speed and rolling of the end body, the main satellite’s orbital radius can be kept. A novel control strategy using a proportional shrinking horizon model predictive control law containing a self-stability modified law is proposed to stabilize both the orbital and libration states to regulate the speed of only the climber. Simulation results validated the proposed control strategy. The system provides a successful approach to the desired equilibrium by the end of the transposition.
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Acknowledgements
This work was funded by the National Natural Science Foundation of China (12102487), Guangdong Basic and Applied Basic Research Foundation (2019A1515111056), and Discovery Grant (RGPIN-2018-05991) of the Natural Sciences and Engineering Research Council of Canada.
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Gefei Shi received his B.S., M.S., and Ph.D. degrees from Northwestern Polytechnical University, Xi’an, China, in 2007, 2011, and 2019, respectively. He is currently an associate professor with the School of Aeronautics and Astronautics, Sun Yat-sen University. His research interests include dynamics and control of tethered space systems, partial space elevators, and underactuated control.
Zheng H. Zhu (M’09–SM’12) received his B.Eng. degree in engineering mechanics, M.Eng. degree in solid mechanics, and Ph.D. degree in computational mechanics from Shanghai Jiao Tong University, China, and M.A.Sc. degree in robotics and Ph.D. degree in mechanical engineering from the University of Waterloo and the University of Toronto in Canada, respectively. He is currently a professor and Tier I York Research Chair in Space Technology at the Department of Mechanical Engineering, York University, Toronto, Canada. He has authored more than 187 peer-reviewed journal articles. His current research interests include dynamics and control of tethered space systems and visual servo space robotics for active space debris removal. Dr. Zhu is a College Member of Royal Society of Canada, Fellows of Canadian Academy of Canada, Engineering Institute of Canada, CSME and ASME, the Associate Fellow of American Institute of Aeronautics and Astronautics, the Academician of International Academy of Astronautics, Senior Member of IEEE, and licensed Professional Engineer.
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Shi, G., Zhu, Z.H. Orbital radius keeping of floating partial space elevator in cargo transposition. Astrodyn 7, 259–269 (2023). https://doi.org/10.1007/s42064-022-0156-y
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DOI: https://doi.org/10.1007/s42064-022-0156-y