Spacecraft momentum unloading using controlled magnetic torques

Details Spacecraft momentum unloading using controlled magnetic torques Spacecraft momentum unloading using controlled magnetic torques

1990-03-05

1992-06-23

Sotelo, Jesus D.

Aeronautics and astronautics

Spacecraft

Attitude control

B64G 110

Patent

active

051236176

ABSTRACT:
A method for maintaining the attitude of a three-axis controlled satellite by use of magnetic torquers includes using magnetometers for measuring the direction of the ambient geomagnetic field. The direction of the net reaction wheel momentum is also determined. The angle between the direction of the geomagnetic field and the net reaction wheel momentum is determined. The angle is compared with a threshold value. Magnetic torquer power consumption is reduced by operating the magnetic torquers only when the angle exceeds the threshold value.

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patent: 3681583 (1972-08-01), Kubo et al.
patent: 3834653 (1974-09-01), Perkel
patent: 3955858 (1976-05-01), Poubeau
patent: 4010921 (1977-03-01), Pistiner et al.
patent: 4062509 (1977-12-01), Muhlfelder et al.
patent: 4071211 (1978-01-01), Muhlfelder et al.
patent: 4916622 (1988-06-01), Raman et al.

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