System for counteracting a disturbance in a spacecraft

Details System for counteracting a disturbance in a spacecraft System for counteracting a disturbance in a spacecraft

2005-07-26

2005-07-26

Eldred, J. Woodrow (Department: 3644)

Aeronautics and astronautics

Spacecraft

Attitude control

C244S169000, C244S171000, C701S013000

Reexamination Certificate

active

06921049

ABSTRACT:
A system for counteracting a disturbance in a spacecraft includes a biasing apparatus that is coupled to the spacecraft and a spacecraft controller within the spacecraft. The disturbance has a known sign, magnitude and time. The biasing apparatus controls the biasing apparatus to place the spacecraft in a first dynamic state or position as a function of the sign, magnitude, and time of the disturbance. The controller also controls the spacecraft to a second dynamic state as a function of the known sign, magnitude, and time so that the spacecraft is oriented in a position other than the desired orientation so that after the disturbance the spacecraft is oriented in the desired orientation in response to the disturbance. The biasing apparatus may comprise a momentum wheel and the disturbance may comprise thrusting firing used for controlling momentum dumping.

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Banerjee, Arun K., Pedreiro, Nelson, Singhose, William E.; “Vibration Reduction for Flexible Spacecraft Following Momentum Dumping With/Without Slewing”; Journal of Guidance, Control and Dynamics, vol. 24, No. 3, May-Jun. 2001.

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