Precision attitude control of the Gravity Probe B satellite

被引：15

作者：

Conklin, J. W. ^{[1
]}

Adams, M. ^{[2
]}

Bencze, W. J. ^{[2
]}

DeBra, D. B. ^{[2
]}

Green, G. ^{[2
]}

Herman, L. ^{[2
]}

Holmes, T. ^{[2
]}

Muhlfelder, B. ^{[2
]}

Parkinson, B. W. ^{[2
]}

Silbergleit, A. S. ^{[2
]}

Kirschenbaum, J. ^{[3
]}

机构：

[1] Univ Florida, Mech & Aerosp Engn, Gainesville, FL 32611 USA

[2] Stanford Univ, Stanford, CA 94305 USA

[3] Lockheed Martin Space Syst Co, Sunnyvale, CA 94089 USA

来源：

CLASSICAL AND QUANTUM GRAVITY | 2015年 / 32卷 / 22期

关键词：

spacecraft attitude control; GP-B; tests of general relativity;

D O I：

10.1088/0264-9381/32/22/224015

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Gravity Probe B satellite used ultra-precise gyroscopes in low Earth orbit to compare the orientation of the local inertial reference frame with that of distant space in order to test predictions of general relativity. The experiment required that the Gravity Probe B spacecraft have milliarcsecond-level attitude knowledge for the science measurement, and milliarcsecond-level control to minimize classical torques acting on the science gyroscopes. The primary sensor was a custom Cassegrainian telescope, which measured the pitch and yaw angles of the experiment package with respect to a guide star. The spacecraft rolled uniformly about the direction to the guide star, and the roll angle was measured by star trackers. Attitude control was performed with sixteen proportional thrusters that used boil-off from the experiment's liquid Helium cryogen as propellant. This paper summarizes the attitude control system's design and on-orbit performance.

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