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Memorias de investigación
Communications at congresses:
Indirect Optimization of End-of-Life Disposal for Galileo Constellation Using Low Thrust Propulsion
Year:2017
Research Areas
  • Space technology,
  • Astronautics,
  • Aeronautical engineering
Information
Abstract
In this work, the end-of-life disposal of satellites in the Galileo constellation using low thrust propulsion is studied. Indirect optimization methods are employed to design transfer maneuvers to remove the satellite from its original operational orbit into previously computed orbits leading to its natural re-entry within 100 years due to lunisolar perturbation effects. The dynamics are formulated using the modified equinoctial elements, which allow expressing the boundary conditions in a simple way at the cost of more complex equations compared to the use of Cartesian coordinates. A special focus is placed in defining an efficient and robust algorithm for solving the two point boundary value problem arising from the first order optimality conditions, including the integration of the analytically-derived variational equations to obtain the State Transition Matrix, and the accurate detection of thrust-switching events. The numerical results obtained for several test cases show the practical feasibility of this end-of-life disposal approach at thrust levels compatible with electric thrusters likely to be used by the next generation of Galileo satellites.
International
Si
Congress
26th International Symposium on Space Flight Dynamics (ISSFD)
960
Place
Matsuyama, Japón
Reviewers
Si
ISBN/ISSN
Start Date
03/06/2017
End Date
09/06/2017
From page
1
To page
6
Participants
  • Autor: Juan Luis Gonzalo Gomez (UPM)
  • Autor: Francesco Topputo (Politecnico di Milano)
  • Autor: Roberto Armellin (Surrey Space Center)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Dinámica Espacial (SDG-UPM)
  • Departamento: Física Aplicada a Las Ingenierías Aeronáutica y Naval
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