Aeronautics and astronautics – Spacecraft – Attitude control
Patent
1991-12-12
1994-01-18
Huppert, Michael S.
Aeronautics and astronautics
Spacecraft
Attitude control
244166, 244171, 244176, 364434, B64G 132, B64G 136
Patent
active
052794830
ABSTRACT:
An attitude control device for a three-axis stabilized satellite in terrestrial orbit embodies an attitude sensing system adapted to deliver roll, yaw and pitch attitude signals, a set of at least three non-parallel axis momentum wheels and a set of at least two magnetic coils oriented at least approximately in two non-parallel directions in the roll/yaw plane. A primary control loop embodies a processor and controller connected between the attitude sensing system and the set of at least three momentum wheels. It is adapted to determine from attitude signals and attitude set point signals attitude correction signals for the momentum wheels so as to apply to the satellite primary attitude correction torques. A secondary control loop embodies a coil controller connected between the processor and controller, the set of at least three momentum wheels and the set of at least two magnetic coils. It is adapted to determine from attitude correction signals addressed to the momentum wheels and from signals representative of the behavior of the wheels compensation signals to be applied to the magnetic coils so that by interaction with the terrestrial magnetic field secondary attitude correction torques are applied to the satellite. A circuit for desaturation in pitch of the set of at least three momentum wheels is connected between the set of at least three momentum wheels and a pitch actuator.
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Kevin J. Heffernan et al. "The Magsat Attitude Control System" Johns Hopkins APL Technical Digest, vol. 1, No. 3 (Jul.-Sep. 1980).
Evolution of an Attitude Control System for Body-Stabilized Communication Spacecraft By: L. Muhlfelder, RCA Astro-Electronics.
Achkar Issam-Maurice
Attanasio Marc
Blancke Bernard
Maute Patrick
Aerospatiale - Societe Nationale Industrielle
Ansley Virna Lissi
Huppert Michael S.
VanOphem Remy J.
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