Andrea Albasini
A NMPC-based spacecraft rendezvous maneuver with moving obstacles and variable prediction horizon.
Rel. Carlo Novara, Michele Pagone. Politecnico di Torino, Corso di laurea magistrale in Mechatronic Engineering (Ingegneria Meccatronica), 2023
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Abstract
Since the first orbiting explorations, the rendezvous maneuver has become a fundamental operation in space missions. The operation consists of a spacecraft alignment to a specific target point, usually another spacecraft or some debris orbiting in the space. A successful rendezvous mission usually requires the determination of the trajectory, the speed, and the timing of the approaching spacecraft to ensure a safe and accurate approach. In this work thesis, the rendezvous problem is explained and analysed. Then, a control algorithm that guides an autonomous spacecraft to a requested position close to the target is proposed. Usually a spacecraft during the mission could encounter obstacles along the orbit, such as a meteorite to be dodged along the trajectory.
In order to make the rendezvous mission more realistic, the task is performed including an obstacle like a sphere moving towards the spacecraft, so that the control algorithm is able to guide the spacecraft along its trajectory, satisfying the path constraints, and making him reach the target point
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