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Assessing Fractionated Spacecraft Value Propositions for Earth Imaging Space Missions

机译：为地球成像太空飞行任务评估航天器的价值主张

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摘要

Fractionated spacecraft consist of physically independent, "free-flying" modules composed of various subsystems. Thus, a fractionated spacecraft might consist of one module providing power generation and storage, another module providing communications, another module providing the payload functions, and so on. Fractionated spacecraft are of particular interest for earth imaging missions because of their ability to physically decouple pointing-intensive payloads from subsystems not requiring such strict pointing. This in turn may enable fractionated spacecraft to have a lower life cycle cost and longer mission lifetime relative to a comparable monolithic spacecraft, for a given performance level. In this research, fractionated architectures were assessed using a custom-built spacecraft model, and their respective life cycle costs were quantified using a stochastic life cycle simulation and parametric model. Results demonstrate that, relative to a comparable monolithic spacecraft, fractionated spacecraft can have a stronger value proposition through the attainment of a lesser life cycle cost for an equal if not longer mission lifetime than comparable monoliths, for high-resolution earth imaging missions.
机译：分级航天器由物理上独立的“自由飞行”模块组成，该模块由各种子系统组成。因此，分级航天器可能由一个提供发电和存储的模块，另一个提供通信的模块，另一个提供有效载荷功能的模块等等组成。对于地球成像任务而言，分馏航天器特别受关注，因为它们能够将指向密集的有效负载与不需要严格指向的子系统物理分离。对于给定的性能水平，这反过来可以使分馏的航天器相对于可比较的整体式航天器具有较低的生命周期成本和较长的任务寿命。在这项研究中，使用定制的航天器模型评估了分馏式架构，并使用了随机生命周期模拟和参数模型来量化它们各自的生命周期成本。结果表明，相对于可比较的整体式航天器，对于高分辨率的地球成像任务，对于相同或什至更长的任务寿命，通过实现更低的生命周期成本，分馏式航天器可以具有更强的价值主张。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2011年第6期|p.974-986|共13页
  • 作者

    M. Gregory ONeill; Annalisa L. Weigel;

  • 作者单位

    Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,Aeronautics and Astronautics, Building 33-115;

    Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,Aeronautics and Astronautics and Engineering Systems, Building 33-404;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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