Two Body Orbits
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Trajectory Control During an Aeroassisted Maneuver Between Coplanar Circular Orbits
ABSTRACT: This paper presents the simulation results of an aeroassisted maneuver around the Earth, between coplanar circular orbits, from a geostationary orbit to a low orbit. The simulator developed considers a reference trajectory and a trajectory perturbed by external disturbances combined with non-idealities of sensors and actuators. It is able to operat
J. Aerosp. Technol. Manag.. Publicado em: 2014-06
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2. The algorithmic weak stability boundary in earth-to-moon mission design: dynamical aspects and applicability.
This thesis consists of an extensive study of the Weak Stability Boundary (WSB) concept in low-energy Earth-to-Moon mission design within the mathematical structure provided by the Planar Circular Restricted Three-Body Problem (PCR3BP). By employing the patched three-body approach to approximate the Sun-Earth-Moon-spacecraft system, we examine and characteri
Publicado em: 2011
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3. Orbitas periodicas em sistemas mecanicos / Periodic orbits in dynamical systems
In this work we study dynamical systems possessing Hamiltonian and time-reversible structures. The reversibility concept is de¯ned in terms of an involution. Initially we discuss the dynamics of Hamiltonian vector ¯elds with 2 and 3 degrees of freedom around an elliptic equilibrium in the presence of an involution which preserves the symplectic structure.
Publicado em: 2008
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4. Orbital maneuvers between the Lagrangian points and the primaries in the Earth-Sun system
This paper is concerned with trajectories to transfer a spacecraft between the Lagrangian points of the Sun-Earth system and the primaries. The Lagrangian points have important applications in astronautics, since they are equilibrium points of the equation of motion and very good candidates to locate a satellite or a space station. The planar circular restri
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-06
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5. Orbital evolution and maneuvers around non-spherical bodies / Evolução orbital e manobras em torno de corpos não-esféricos
In the last years several asteroids had their shapes identified using images from space probes or through the indirect radar data determination. In a general way, these asteroids have forms quite different from spherical. Conventional spherical harmonic representations of the gravitational potential of such bodies require expansions of high degree and order,
Publicado em: 2006
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6. Alternative paths in the Earth-moon system / Trajetórias alternativas no sistema Terra-Lua
The Restricted Three Body Problem predicts the existence of the several families of periodic orbits in the Earth-Moon System. In this work, we studied two of them the Family G of direct periodic orbits around the L1 and the Family H2 of direct periodic orbits around the Moon. Our investigations considered, besides the Restricted Three body Problem, the Four
Publicado em: 2005
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7. Transferências orbitais e dinâmicas na vizinhança dos pontos lagrangianos L1 e L2 / Transfer orbits and dynamics around the lagrangian points L1 e L2
In this work we present a study of the dynamics in the vicinity of the Lagrangian points L1 and L2 in the restricted three-body problem, considering the Sun-Earth and Earth-Moon models. Notwithstanding the hyperbolic character of these points, the reduction to the central manifold allows periodic and quasi-periodic orbits. This procedure is applied through t
Publicado em: 2005
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8. Pertubação de terceiro corpo com modelos de média simples / Third body perturbation using a single averaged model.
Na literatura, existem diversos trabalhos que estudam os efeitos da perturbação de um terceiro corpo sobre um satélite. Alguns deles utilizam a hamiltoniana do sistema e outros utilizam a função perturbadora expressa em forma analítica. A presente dissertação de mestrado tem o objetivo de desenvolver um estudo semi-analítico da perturbação causada
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 200202
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9. Pertubação de terceiro corpo com modelos de média simples / Third body perturbation using a single averaged model.
Several papers can be found in the literature that study the effect of the third body perturbation in a spacecraft. Some of them work with the Hamiltonian of the system and some others with the disturbing function expressed in an analytic form. The present master dissertation has the goal of developing a semi-analytical study of the perturbation caused in a
Publicado em: 2002
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10. Manobras orbitais aplicadas aos problemas de dois e tres corpos
Nas atividades espaciais, e de grande importancia o estudo das trajetorias que os veIculos espaciais devem seguir para completar uma missao. Com essa motivacao, o presente trabalho esta concentrado no estudo dessas trajetorias, dentro da dinamica dada por: a)o problema tradicional de dois corpos com orbitas keplerianas, onde e suposto que o veiculo espacial
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 200002
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11. Manobras orbitais aplicadas aos problemas de dois e tres corpos
In the space activities, it is of great importance the study of the trajectories that the space vehicles should follow to complete a mission. With that motivation, the present research is concentrated in the study of those trajectories, under the dynamics given by: a)The traditional Problem of Two Bodies with Keplerian orbits where the space vehicle is suppo
Publicado em: 2000
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12. Manobras orbitais aplicadas aos problemas de dois e tres corpos
Nas atividades espaciais, e de grande importancia o estudo das trajetorias que os veIculos espaciais devem seguir para completar uma missao. Com essa motivacao, o presente trabalho esta concentrado no estudo dessas trajetorias, dentro da dinamica dada por: a)o problema tradicional de dois corpos com orbitas keplerianas, onde e suposto que o veiculo espacial
Publicado em: 2000