Robust Multi-body Slewing Trajectories via Unscented Optimal Control

Document Type

Conference Proceeding

Publication Date

2-2-2021

Abstract

Traditional trajectory generation for multi-body reorientation maneuvers rely upon simplified kinematic principles employing conservative constraints on maximum gimbal torque and velocity to minimize disturbances. Techniques such as notch filtering or input shaping are utilized to increase robustness and reduce excitation of structural modes. This manuscript investigates the use of unscented optimal control techniques to generate maneuvers robust against uncertain parameters while simultaneously decreasing maneuver length and minimizing system vibrational excitation. The proposed method employs pseudospectral optimal control while leveraging the unscented transform to account for parameter uncertainty. The performance and robustness of the resulting trajectories are compared against standard maneuvers.

Source Publication

31st AAS/AIAA Space Flight Mechanics Meeting

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