| Texto completo | |
| Autor(es): |
Murcia, Jhonathan O. P.
;
Prado, Antonio F. B. A.
;
Parker, JS
;
Seago, JH
;
Strange, NJ
;
Scheeres, DJ
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ASTRODYNAMICS 2018, PTS I-IV; v. 162, p. 16-pg., 2018-01-01. |
| Resumo | |
The impulsive or powered aero-gravity-assisted is an orbital maneuver that combines three basic components: a gravity-assisted with a passage by the atmosphere of the planet during the close approach and the application of an impulse during this passage. The mathematical model used to simulate the trajectories is the Restricted Three-Body Problem including aerodynamic forces. The present paper uses this type of maneuver considering atmospheric drag and lift forces. The lift is applied orthogonal to the initial orbital plane to generate an inclination change in the trajectory of the spacecraft, which are very expensive maneuvers. The lift to drag ratio selected goes up to 9.0, because there are vehicles, like waveriders, designed to have these values. When the spacecraft is located at the periapsis the impulse is applied to increase or decrease the variation of energy given by the aero-gravity-assisted maneuver. The planets Venus and Mars are selected to be the secondary bodies for the maneuver, due to their atmospheric density and strategic location to provide possible use for future missions in the solar system. Results of the numerical simulations show the maximum changes in the inclination obtained by the maneuvers as a function of approach angle and direction of the impulse, lift to drag ratio and ballistic coefficient. In the case of Mars, inclination change can be larger than 13 degrees, and for Venus higher than 21 degrees. The energy and inclination variations are shown for several selected orbits. (AU) | |
| Processo FAPESP: | 11/08171-3 - Dinâmica orbital de pequenos corpos |
| Beneficiário: | Othon Cabo Winter |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 16/14665-2 - Astrodinâmica Aplicada a Veículos Espaciais |
| Beneficiário: | Antônio Fernando Bertachini de Almeida Prado |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |