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Mostrando ítems 11-20 de 89
An interplanetary mission to Neptune system: Gravitational capture and maneuvers around triton
(2007-12-01)
The gravitational capture was initially used to understand the capture of planetary satellites. However, in the 90's decade, this phenomenon was applied in spacecraft trajectories. Belbruno and Miller studied missions in ...
A study of the relative velocities of small particles that are orbiting the earth
(2008-12-01)
The evolution of the velocity of the particles with respect to the circular orbits of satellites that are around the Earth that the particles will cross, suggests a range of possible velocities of impact as a function of ...
Modeling, Construction and Control of Quadrotors
(2021-01-01)
Flight stabilization control of UAVs (Unmanned Aerial Vehicles) quadrotors covers several areas of engineering knowledge, such as mechanics, electronics and computing. The aim of this work is the development of different ...
The balloon flights in the tropics of the hibiscus project
(2005-12-19)
HIBISCUS is a project for studying the dynamics, microphysics and chemistry of the Tropical Tropopause Layer based on balloon measurements. Thirteen heavy sondes and 18 short duration balloons of different types have been ...
Relative Positioning Evaluation of a Tetrahedral Flight Formation's Satellites
(2017-10-25)
This paper presents a study about the tetrahedral layout of four satellites in a way that every half-orbital period this set groups together while flying in formation. The formation is calculated analyzing the problem from ...
Fatigue Behavior of Weld Repaired AISI 4130 Aeronautic Steel Used in Critical Flight Safety Structures
(Trans Tech Publications Ltd, 2014-01-01)
Since the 1950s, fatigue is the most important project and operational consideration for both civil and military aircrafts. For some aircraft models the most loaded component is one that supports the motor: the Motor Cradle. ...
Optimal aerodynamic design of multi-flapping wing vehicles with morphing capabilities
(2021-01-01)
Some groups of birds have the ability to save energy during flight by arranging themselves in V-formation. This formation enables an increase in the overall efficiency of the group because the wake vortices shed by each ...
Interplanetary natural routes via Moon and Lagrangiam points L1 and L2
(2008-12-01)
Swing-by techniques are extensively used in interplanetary missions to minimize fuel consumption and to raise payloads of spaceships. The effectiveness of this type of maneuver has been proven since the beginning of space ...
The aster mission: Exploring for the first time a triple system asteroid
(2011-12-01)
2001 SN263 is a triple system asteroid. Although it was discovery in 2001, in 2008 astronomical observation carried out by Arecibo observatory revealed that it is actually a system with three bodies orbiting each other. ...