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http://dx.doi.org/10.5139/JKSAS.2018.46.9.760

Relationship between Magnetic Torquer Arrangement and Reaction Wheel Momentum Dumping Performance  

Son, Jun-Won (Korea Aerospace Research Institute)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.46, no.9, 2018 , pp. 760-766 More about this Journal
Abstract
Due to external disturbances on the satellite, unwanted momentum is accumulated on reaction wheels. To remove this momentum, three magnetic torquers which are installed along the satellite's axes are used. The magnetic torquers generated torque indirectly by interactions with the earth's magnetic field. Thus, during momentum dumping, we should consider both the magnetic torquer and the earth's magnetic field generated on the magnetic torquers at the same time. When low earth orbit satellite with high inclination angle holds nadir pointing attitude, weak earth's magnetic field is generated along the satellite's pitch axis. In this case, one magnetic torquer is overloaded and momentum dumping performance is degraded. This research will review the method to improve the momentum dumping performance by adjusting magnetic torquers arrangement.
Keywords
Magnetic Torquer; Momentum Dumping; Low Earth Orbit Satellite;
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