Aeronautics and astronautics – Spacecraft – Attitude control
Patent
1995-07-03
1997-08-12
Kashnikow, Andres
Aeronautics and astronautics
Spacecraft
Attitude control
244164, B64G 128
Patent
active
056557353
ABSTRACT:
A low cost, fuel efficient solution to the problem of avoiding high yaw errors in communications satellites after station keeping maneuvers is achieved by adding a selectable function to the LTMM controller which allows it to calculate roll momentum based on measured yaw attitude error data from the yaw DIRA. The so calculated roll momentum is used to trigger roll unloads, which will reduce the yaw attitude error. This solution has the advantages that: it maintains yaw attitude error within the pointing budget; the fuel penalty is negligible; it can be made fully automatic; it can be disabled and not used; and, it requires only a very small addition to the firmware.
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Baylocq Michel B.
Chu Peter Y.
Higham John S.
Wirthman David J.
Dinh Tien
Kashnikow Andres
Space Systems Loral, Inc.
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