Libration and end body swing stabilization of a parallel partial space elevator system  

作　　者：Gefei SHI Gangqiang LI Zheng H.ZHU 

机构地区：[1]School of Aeronautics and Astronautics,Sun Yat-Sen University,Guangzhou 510275,China [2]Department of Mechanical Engineering,York University,Toronto,Ontario M3J 1P3,Canada

出　　处：《Chinese Journal of Aeronautics》2021年第3期187-199,共13页中国航空学报（英文版）

基　　金：supported by the Discovery Grant (No. RGPIN2018-05991);Discovery Accelerate Supplement Grant (No. RGPAS-2018-522709) of Natural Sciences and Engineering Research Council of Canada;Guangdong Basic and Applied Basic Research Foundation (No. 2019A1515111056)。

摘　　要：This paper studies the libration and stabilization of a parallel partial space elevator system in circular orbits. The system is made up of two paralleled partial space elevators, each of which consists of one main satellite, one end body and a climber moving along the tether between them.The libration characteristics of the elevator are studied through numerical analysis by a new dynamic model, and a novel control strategy is proposed to stabilize the swing of the end body by projecting the climber speeds only. Optimal control method is used to implement the new control strategy in the case where the climbers move in opposite direction. The simulation results validate the effectiveness of the proposed control strategy whose application will neither sacrifice the transport efficiency nor exacerbate libration significantly.

关 键 词：Libration stabilization Nonlinear dynamics Optimal control Parallel partial space elevator Space tether 

分 类 号：V47[航空宇航科学与技术—飞行器设计] V414