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首页> 外文会议>Annual AAS (American Astronautical Society) Rocky Mountain Guidance and Control Conference Feb 5-9, 2003 Breckenridge, Colorado, U.S.A. >EXTREME ACCURACY STAR TRACKER IN SUPPORT OF HYPER PRECISION COLD ATOM INTERFEROMETRY
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EXTREME ACCURACY STAR TRACKER IN SUPPORT OF HYPER PRECISION COLD ATOM INTERFEROMETRY

机译：支持高精度超冷原子干涉的极精确星跟踪器

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摘要

HYPER stands for Hyper-precision cold atom interferometry in space. HYPER is a potential Future Flexi-mission of the European Space Agency, ESA, in the fundamental physics domain. Following a preliminary feasibility study (Ref 1) conducted in the Concurrent Design Facility of the European Space Technology Center, ESTEC, which was supported by Professor W. Ertmer of the "Institut fuer Quantenoptik, Hanover" and his team of scientists, ESA awarded Astrium Germany and its industrial team with a "follow-on" Feasibility Study Contract. As part of this team, Galileo Avionica was responsible for the design and performance requirements simulation of the optical bench and precision star tracker, two of the components at the heart of the HYPER payload. This paper provides first of all an essential but quick introduction to cold atom-wave interferometry which is at the core of the high-performance HYPER pay-load and provides the capability of measuring accelerations and rotations with extremely high accuracy. A summary of the scientific mission objectives, which entail the repeated measurement of extremely small rotations and accelerations over at least one-year period with respect to an inertial reference frame, is described. Thereafter, a short resume of the main mission requirements is given. Among these requirements are two "critical" requirements, which dominate the overall spacecraft design: 1. The superior thermo-mechanical stability between the HYPER instruments and a Precision Star Tracker, PST, which provides the inertial attitude reference in science mode (Spectral Density=2.75x10~(10) rad/Hz~(-0.5), in the frequency range between 3.2x10~(-5) Hz and 0.15 Hz); 2. The PST Absolute Measurement Accuracy (Spectral Density=1.75x10~(-9) rad/Hz~(-0.5), in the frequency range between 3.2x10~(-5) Hz and 5 Hz). Finally, this paper highlights the challenges the Industrial Team faced in meeting those requirements and describes the optical design of this extremely accurate Precision Star Tracker. The preliminary results of the performance requirements simulation are also presented.
机译：HYPER代表太空中的超精密冷原子干涉仪。在基础物理领域，HYPER是欧洲航天局（ESA）潜在的未来灵活任务。在ESTEC欧洲空间技术中心的并行设计设施中进行了初步可行性研究（参考1）之后，该研究得到了“汉诺威工业大学”的W. Ertmer教授及其科学家团队的支持，ESA授予了Astrium德国及其工业团队签订了“后续”可行性研究合同。作为该团队的一部分，伽利略航空航天公司负责光学平台和精密恒星跟踪仪的设计和性能需求仿真，这是HYPER有效载荷核心的两个组件。本文首先对冷原子波干涉测量法进行了必不可少的快速介绍，它是高性能HYPER有效载荷的核心，并且能够以极高的精度测量加速度和旋转。描述了科学任务目标的摘要，该目标需要相对于惯性参考系在至少一年的时间内重复测量极小的旋转和加速度。此后，简要概述了主要任务的要求。在这些要求中，有两个“关键”要求，它们支配着整个航天器的设计：1. HYPER仪器和Precision Star Tracker PST之间的卓越的热机械稳定性，它在科学模式下提供了惯性姿态参考（光谱密度= 2.75x10〜（10）rad / Hz〜（-0.5），频率范围在3.2x10〜（-5）Hz和0.15 Hz之间）; 2. PST绝对测量精度（频谱密度= 1.75x10〜（-9）rad / Hz〜（-0.5），在3.2x10〜（-5）Hz至5 Hz的频率范围内）。最后，本文重点介绍了工业团队在满足这些要求时所面临的挑战，并介绍了这种极其精确的Precision Star Tracker的光学设计。还提出了性能需求模拟的初步结果。

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