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- W4220746355 abstract "In this work, we propose a novel controller based on a simple adaptive controller methodology and model predictive control (MPC) to generate and track trajectories of a spacecraft in the vicinity of asteroids. The control formulation is based on using adaptive control as a feedback controller and MPC as a feed-forward controller. The spacecraft system model, asteroid shape and inertia are assumed to be unknown, with the exception of the estimated total mass and angular velocity of the asteroid. The MPC is used to generate feed-forward trajectories and control input using only the mass and angular velocity of the asteroid combined with obstacle avoidance constraints. However, since the control input from MPC is calculated using only an approximated model of the asteroid, it fails to control the spacecraft in the presence of disturbances due to the asteroid’s irregular gravitational field. Hence, we propose an adaptive controller in conjunction with MPC to handle unknown disturbances. The numerical results presented in this work show that the novel control system is able to handle unknown disturbances while generating and tracking sub-optimal trajectories better than adaptive control or MPC solely." @default.
- W4220746355 created "2022-04-03" @default.
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- W4220746355 date "2022-03-15" @default.
- W4220746355 modified "2023-09-26" @default.
- W4220746355 title "Direct-Adaptive Nonlinear MPC for Spacecraft Near Asteroids" @default.
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- W4220746355 doi "https://doi.org/10.3390/aerospace9030159" @default.
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