Gravity Gradient Satellite Stabilisation With Active Damper Using Optimal Control
Keywords:
Linear Quadratic Gaussian, Small Satellite, Satellite Attitude Control, Dampers, Band-Limited NoiseAbstract
The major challenge of passive attitude control for small satellite are the lack of accuracy and the inability to effectively damp oscillations associated with attitude reorientation due to presence of external disturbances on the satellite. To reduce these undesired oscillations, passive dampers may be used, but they take a long time to achieve required results. A study of an active damper that applies a magnetic torque was presented as an alternative control strategy of small satellites to produce the needed moments to counteract the external disturbances. Linear Quadratic Gaussian (LQG) controller was designed for the attitude control of small satellite, incorporating active magnetic damping. Results showed that both attitude reorientation and active damping were achieved in less than 30s.
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