Continuous Wheel Momentum Dumping Using Magnetic Torquers and Thrusters

Details Continuous Wheel Momentum Dumping Using Magnetic Torquers and Thrusters Continuous Wheel Momentum Dumping Using Magnetic Torquers and Thrusters

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jass...13..194o&link_type=abstract

Journal of Astronomy and Space Sciences, vol. 13, no. 2, p. 194-205.

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Two momentum management schemes using magnetic torquers and thrusters are sug-gested. The stability of the momentum dumping logic is proved at a general attitude equilibrium. Both momentum dumping control laws are implemented with Pulse-Width- Pulse-Frequency Modulated on-off control, and shown working equally well with the original continuous and variable strength control law. Thrusters are assummed to be asymmetrically configured as a contingency case. Each thruster is fired following separated control laws rather than paired thrusting. Null torque thrusting control is added on the thrust control calculated from the momentum control law for the gener-ation of positive thrusting force. Both magnetic and thrusting control laws guarantee the momentum dumping, however, the wheel inner loop control is needed for the "wheel speed" dumping, The control laws are simulated on the KOrea Multi-Purpose SATellite (KOMPSAT) model.

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