High-efficiency REA optimized stationkeeping

Details High-efficiency REA optimized stationkeeping High-efficiency REA optimized stationkeeping

2005-06-21

2005-06-21

Barefoot, Galen (Department: 3644)

Aeronautics and astronautics

Spacecraft

Attitude control

C701S013000

Reexamination Certificate

active

06908064

ABSTRACT:
A velocity change (ΔV) thruster is operated on a spacecraft, which unavoidably causes attitude error. A reaction wheel (RWA) corrects the attitude. At the beginning of the thruster maneuver, the total attitude control momentum required to at least correct for the ΔV thruster attitude errors over the duration of the entire maneuver is determined, and the RWA momentum may also be determined. Attitude control thrusters (REAs) are operated. The REAs are operated to correct at least the net ΔV thruster induced attitude error, and preferably also to reset the RWA to its nominal momentum. The maneuver may be stationkeeping.

REFERENCES:
patent: 5335179 (1994-08-01), Boka et al.
patent: 5517418 (1996-05-01), Green et al.
patent: 5944761 (1999-08-01), Heiberg
patent: 6296207 (2001-10-01), Tilley et al.
patent: 6445981 (2002-09-01), Higham et al.

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