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Trajectory design and control for formation flying spaceborne interferometers

机译:编队飞行星载干涉仪的轨迹设计与控制

摘要

Spaceborne interferometry promises to greatly expand our knowledge of astronomy and astrophysics, and open the doors to many new discoveries. The purpose of this study is to investigate optimal resource management techniques for separated space-craft interferometers to successfully synthesize images. Assuming optimal imaging configurations that satisfy astronomical requirements have been selected, a two-step approach is taken to satisfy these requirements: (1) develop a framework to man-age control effort among different satellites during observation and retargeting of the spacecraft formations, to thereby maximize the number of observations that can be taken with a given amount of consumables, and (2) determine computationally efficient control techniques to minimize control effort while meeting image synthesis metrics. First, issues relating to planning optimal trajectories that trade imaging metrics for spacecraft design metrics such as mission length and spacecraft mass are addressed. The determination of optimal spacecraft locations or trajectories for image acquisition is studied to satisfy astronomical constraints. These positioning requirements lead to the computation of trajectories for the retargeting of formation flying interferometers to capture images of a new astronomical target. Second, the trajectories planned under this approach are used in the formulation of a tracking control problem for spaceborne interferometric apertures.
机译:星载干涉仪有望极大地扩展我们的天文学和天体物理学知识,并为许多新发现打开大门。这项研究的目的是研究分离的航天器干涉仪的最佳资源管理技术,以成功地合成图像。假设已选择满足天文学要求的最佳成像配置,则采取两步方法来满足这些要求:(1)建立一个框架,以在观察和重新确定航天器编队的目标期间管理不同卫星之间的管理工作,从而最大化使用给定数量的消耗品可以进行的观察次数,以及(2)确定计算有效的控制技术,以在满足图像合成指标的同时最小化控制工作量。首先,解决与计划最佳轨迹有关的问题,这些最优轨迹将成像指标与航天器设计指标(例如任务长度和航天器质量)进行了交易。为了确定天文约束,研究了确定用于图像采集的最佳航天器位置或轨迹。这些定位要求导致轨迹的计算,以重新调整编队飞行干涉仪的目标,以捕获新的天文目标的图像。其次,在这种方法下计划的轨迹被用于星载干涉测量孔径的跟踪控制问题的制定。

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