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Acquisition, Tracking and Pointing Control of the Bifocal Relay Mirror Spacecraft

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Author
Romano, M.
Agrawal, B.N.
Date
2003
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Abstract
This paper presents the results of both numerical and experimental studias on the guidance, dynamics and control of the Bifocal Relay Mirror spacecraft. This proposed spacecraft consists of two large gimbaled telescopes, that arc optically couplad and used to redirect, a laser beam from a ground-based source to a distant point. The attitude control system consists of reaction wheels, star trackers and gyros. The optical control system consists of fast steering mirrors and optical tracker sensors. The very tight pointing and jitter requirements, together with the multi-body nature of the spacecraft, make the control of the system very challenging. Numarical simulations have been performed on a complete analytical model of the system dynamics, in order to compare two different control approaches proposed for the attitude and tracking/pointing. Moreover experiments were carried out on a spacecraft simulator test-bed, modelling the transmitter portion of the Bifocal Relay Mirror spacecraft. The main tasks of the presented experiments were: first, to validate the attitude stabilization control together with the target acquisition-tracking-pointing and laser jitter rejection; second, to prove the effectiveness of the test-bed itself as an important tool to be used in the following researches.
Description
The article of record as published may be found at http://dx.doi.org/10.1016/SOO94-5765(03)00131-O
Rights
This publication is a work of the U.S. Government as defined
in Title 17, United States Code, Section 101. As such, it is in the
public domain, and under the provisions of Title 17, United States
Code, Section 105, is not copyrighted in the U.S.
URI
http://hdl.handle.net/10945/34517
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  • Spacecraft Research and Design Center Publications

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    Romano, M.; Agrawal, B.N. (2002);
    The present paper reports the results of numerical simulations carried out on a model of the Bifocal Relay Mirror spacecraft. This spacecraft consists of two large mechanically and optically coupled telescopes, used to ...
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    Acquisition, Tracking and Pointing Technology Development for Bifocal Relay Mirror Spacecraft 

    Kim, J.J.; Sands, T.; Agrawal, B.N. (2007);
    The purpose of the research is to develop acquisition, tracking, and pointing technologies for the Bifocal Relay Mirror Spacecraft and verify these technologies with the experimental test-bed. Because of the stringent ...
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    Development of a high-precision sensor for the attitude determination of the bifocal spacecraft simulator 

    Connolly, Brian D. (Monterey, California. Naval Postgraduate School, 2004-06);
    Design Center of the Naval Postgraduate School. The objective of this simulator is to provide on-the-ground simulation of the dynamics and control of spacecraft for high precision Acquisition, Tracking and Pointing ...
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