Dynamics and operation optimization of partial space elevator with multiple climbers

Gefei Shi; Gangqiang Li; Zhanxia Zhu; Zheng H. Zhu

doi:10.1016/j.asr.2019.01.022

Dynamics and operation optimization of partial space elevator with multiple climbers

Gefei Shi, Gangqiang Li, Zhanxia Zhu, Zheng H. Zhu

School of Astronautics

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

This work studies the dynamics and optimal stabilization method of a partial space elevator (PSE) system with multiple climbers. All satellites and climbers are assumed as lumped masses that are connected by straight, massless, and inextensible tethers. A general dynamic model is derived for the PSE with multiple climbers. It is found different climber moving patterns of climbers have major influence of dynamic behavior of PSE. Optimal control is used to develop optimal operation modes to suppress the libration of PSE with multiple climbers. Moreover, a new operation mode is proposed to approach the desired mission objectives. It is found that all libration angles can be suppressed to zero by the end of the transfer period if two climbers can be kept at a constant speed. At the same time, the magnitudes of libration angles can be kept bounded by regulating the speed of the middle climber relative to other two climbers.

Original language	English
Pages (from-to)	3213-3222
Number of pages	10
Journal	Advances in Space Research
Volume	63
Issue number	10
DOIs	https://doi.org/10.1016/j.asr.2019.01.022
State	Published - 15 May 2019

Keywords

Mission optimization
Multibody dynamics
Partial space elevator with multiple climbers
Tethered space satellites

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10.1016/j.asr.2019.01.022

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title = "Dynamics and operation optimization of partial space elevator with multiple climbers",

abstract = "This work studies the dynamics and optimal stabilization method of a partial space elevator (PSE) system with multiple climbers. All satellites and climbers are assumed as lumped masses that are connected by straight, massless, and inextensible tethers. A general dynamic model is derived for the PSE with multiple climbers. It is found different climber moving patterns of climbers have major influence of dynamic behavior of PSE. Optimal control is used to develop optimal operation modes to suppress the libration of PSE with multiple climbers. Moreover, a new operation mode is proposed to approach the desired mission objectives. It is found that all libration angles can be suppressed to zero by the end of the transfer period if two climbers can be kept at a constant speed. At the same time, the magnitudes of libration angles can be kept bounded by regulating the speed of the middle climber relative to other two climbers.",

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AU - Shi, Gefei

AU - Li, Gangqiang

AU - Zhu, Zhanxia

AU - Zhu, Zheng H.

PY - 2019/5/15

Y1 - 2019/5/15

N2 - This work studies the dynamics and optimal stabilization method of a partial space elevator (PSE) system with multiple climbers. All satellites and climbers are assumed as lumped masses that are connected by straight, massless, and inextensible tethers. A general dynamic model is derived for the PSE with multiple climbers. It is found different climber moving patterns of climbers have major influence of dynamic behavior of PSE. Optimal control is used to develop optimal operation modes to suppress the libration of PSE with multiple climbers. Moreover, a new operation mode is proposed to approach the desired mission objectives. It is found that all libration angles can be suppressed to zero by the end of the transfer period if two climbers can be kept at a constant speed. At the same time, the magnitudes of libration angles can be kept bounded by regulating the speed of the middle climber relative to other two climbers.

AB - This work studies the dynamics and optimal stabilization method of a partial space elevator (PSE) system with multiple climbers. All satellites and climbers are assumed as lumped masses that are connected by straight, massless, and inextensible tethers. A general dynamic model is derived for the PSE with multiple climbers. It is found different climber moving patterns of climbers have major influence of dynamic behavior of PSE. Optimal control is used to develop optimal operation modes to suppress the libration of PSE with multiple climbers. Moreover, a new operation mode is proposed to approach the desired mission objectives. It is found that all libration angles can be suppressed to zero by the end of the transfer period if two climbers can be kept at a constant speed. At the same time, the magnitudes of libration angles can be kept bounded by regulating the speed of the middle climber relative to other two climbers.

KW - Mission optimization

KW - Multibody dynamics

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KW - Tethered space satellites

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Dynamics and operation optimization of partial space elevator with multiple climbers

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Keywords

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