Colloquium: Fernando Gámez Losada (Space Flight)

19 december 2019 09:30 - Locatie: Lecture Room D, Faculty of Aerospace Engineering, Kluyverweg 1, Delft

Controllability of Solar-Sail Orbits in the Earth-Moon System

This thesis focuses on the orbit control of three types of solar-sail periodic orbits within the Earth-Moon system that have been shown potential for polar observation of either body. One of these orbit types, coined the distant-circular family, is newly introduced in this paper together with transfers between northern and southern distant-circular orbits. Its remote orbits can achieve continuous coverage of both the Earth's North Pole and the lunar South Pole with just a single sailcraft. Developed mainly under the simplified, but non-autonomous, dynamics of the solar-sail circular restricted three-body problem, these orbits are all unstable and require an active control strategy for station-keeping. By slowly migrating the dynamics to a higher fidelity model, we introduce several disturbances. Two solar-sail architectures, a fixed-shape and heliogyro sails, are compared with respect to the objective of tracking the ideal reference orbits that all use a simple Sun-sail steering law as reference control.