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Survey of mission evolution and flexibility in the Space Shuttle program

机译：航天飞机计划的任务演变和灵活性调查

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Given the diversity of missions it has accomplished and the myriad of adaptations it has undergone, the US Space Shuttle is widely regarded as a highly flexible space vehicle. With the Shuttle's upcoming 2011 retirement, it is instructive to survey the history of this vehicle's flexibility for the insights it can provide to the design and characterization of flexibility in future space systems. Data are presented on the evolution of mission requirements over time for 120 missions performed by the Space Shuttle over a period of some 27 years. Distinct trends in the time domain - as well as their causes - are identified and discussed, and early manifest plans from 1982 serve as a confirmation that these trends were not originally anticipated. Eight examples are then presented of engineering modifications that allowed the Shuttle to adapt and accommodate these requirement changes. Several additional instances of Shuttle flexibility are explored, such as post-Columbia disaster modification, upgrade programs and derived vehicles, and one case in which flexibility was inhibited by an early design decision.rnPublished by Elsevier Ltd.
机译：考虑到它已经完成的任务的多样性和经历的无数次修改，美国航天飞机被广泛认为是一种高度灵活的航天器。随着航天飞机即将于2011年退役，对这种飞行器的灵活性的历史进行考察对于它可以为未来太空系统的柔性的设计和特性提供的见解具有指导意义。数据显示了航天飞机在大约27年的时间内执行的120次飞行任务随时间变化的需求。确定并讨论了时域中的明显趋势及其原因，并且从1982年开始的早期清单计划可以确认这些趋势最初不是预期的。然后提供了八个工程修改示例，这些修改使Shuttle可以适应和适应这些需求更改。探索了Shuttle灵活性的其他几种实例，例如哥伦比亚后的灾难修改，升级程序和派生的车辆，还有一种案例，这种灵活性因早期的设计决策而受到抑制。rns由Elsevier Ltd.发布。

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