Split-Horizon MPC for Coupled Station Keeping, Attitude Control, and Momentum Management of GEO Satellites using Electric Propulsion

摘要

-based attitude control law to maintain a nadir-pointing attitude, and an outer loop for station keeping and momentum management. The MPC formulation makes use of two different prediction horizons; a short horizon is used for the states associated with the orbit's inclination and a longer horizon is used for all other states. This split-prediction horizon MPC policy leads to a significant reduction in delta-v compared to a single horizon. The continuous thrust command generated by the MPC policy is quantized as a single on-off pulse every feedback period in such a way that the predicted error in the states induced by quantization is minimized, which reduces the number of on-off pulses compared to other quantization approaches in the literature, including pulse-width modulation.