| 摘要: |
| 在太空制造过程中，不同制造平台的轨道往往是不同的，这使得对物资的跨轨道运输成为太空制造过程的重要需求。面向这一需求，空间系留电梯技术突破了传统运输模式在运输窗口与工质消耗方面的困难，提供了一种高效、灵活、低消耗的跨轨道运输手段。在该系统中，位于较高轨道的主航天器通过系绳将制造平台或运输航天器系留于较低轨道，利用电力驱动的负载运输舱可沿系绳快速移动，从而实现两个航天平台之间的跨轨道载荷运输。在载荷运输的过程中，运输舱沿系绳的移动将导致主航天器轨道参数发生明显变化，进而使得主航天器上的长桁架结构（主桁架）产生明显的结构振动。这对主航天器的在轨组装与稳定运行十分不利。针对上述情况，本文首次探讨并分析了空间系留电梯载荷运输过程的主航天器长桁架结构振动情况，为后续的振动抑制策略提供了可信的动力学基础。 |
| 关键词: 空间系留电梯 跨轨道载荷运输 姿-轨-柔耦合 结构振动 |
| 基金项目: |
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| Initial Dynamic Analysis of the Long Truss Structure of the Main Satellite in Cargo Transportation of the Partial Space Elevator |
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Shi Wenjing1, Cheng Zhengai2, Shi Gefei*3
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1. Beijing Institute of Spacecraft System Engineering, Beijing 100094;2. Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094;3. School of Aeronautics and Astronautics,
Sun Yat-sen University, Guangzhou 510275
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| Abstract: |
| In the process of space manufacturing, the orbits of different manufacturing platforms are often different, which makes the cross-orbit transportation of materials become an important demand in the process. To meet this demand, partial space elevator technology breaks through the difficulties of traditional transportation mode in terms of transportation window and working medium consumption, and provides an efficient, flexible and low cost means of cross rail transportation. In the partial space elevator system, the main satellite in a higher orbit tethers a transport satellite or extended operation platform in a lower orbit via a tether. A climber can move along the tether for load transfer between the two satellites in a fast manner. In the transfer period, the climber’s movement along the tether significantly changes the main satellite’s orbit, leading obvious vibrations in its long truss structure, which is detrimental to the satellite’s on-orbit assembly and stable operation. This paper first analyzes the vibrations of the main satellite’s long truss during load transfer as the base of the future studies of the vibration control. |
| Key words: partial space elevator cross-orbit materials transportation coupling of attitude, orbit and flexibility structural vibration |
