Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Libration points"”.
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Spacecraft formation flight at sun-earth/moon libration points
<p>"Formations of spacecraft, positioned near the libration points of the Sun- Earth/Moon system, have recently received an increase in interest in response to a variety of mission needs. Specifically, missions such as the Micro Arcsecond X-Ray Imaging Mission (MAXIM), Terrestrial Pathfinder (TPF), …
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Constrained Motion Analysis of Spacecraft Trajectory in Restricted Three Body Problem
<p>Due to the popularity of libration points, many satellites are being maintained on their desired trajectory. Indian space research organization has planned to launch the Aditya-L1 spacecraft to study about the Sun by 2021. James Webb Space Telescope has also been designed to observe deep space …
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A transfer network linking Earth, Moon, and the triangular libration point regions in the Earth-Moon system
… not been fully investigated yet. The triangular libration points, <em>L</em> 4and <em>L</em>5, in the Earth-Moon system have long been thought of as ideal locations for a communications satellite. Recently, Distant Retrograde Orbits (DROs) and Near-Rectilinear Halo Orbits (NRHOs) near the Moon …
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Optimization of Spacecraft Formations about Lagrange Points for the Next Generation Space Weather Prediction Mission
… Mission, a multi-spacecraft mission at various libration points whose objective is to forecast Space Weather hazards with a 12day warning time. This thesis deals with the design and control of orbits of spacecraft formations at different libration points. The systems studied are SunEarth, …
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On the dynamics, stability and control of displaced lunar orbits
… (CRTBP). In particular, periodic orbits near the libration points in the Earth-Moon system will be explored along with their applications. A hybrid concept for displaced lunar orbits has been developed to overcome the limitations of both solar sailing and SEP. Feedback linearisation is used to …
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Development of a Mission Design Tool for Computing Libration Point Formations Using Differential Corrections Initialized with a Genetic Algorithm
… trajectories in the vicinity of the collinear libration points. A natural formation decreases the station keeping costs, lowering the consumption of spacecraft resources and extending mission lifetime. This research adapts both numerical and machine learning approaches to the problem of mission …
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Design of transfers from Earth-Moon L 1/L2 libration point orbits to a destination object
… activities, orbits near the Earth-Moon L1 and L2 libration points could support lunar surface operations and serve as staging areas for future missions to near-Earth asteroids as well as Mars. In fact, an Earth-Moon L2 libration point orbit has been proposed as a potential hub for excursions to …
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Low thrust augmented periodic orbits in the two- and three-body problems
… to the linearised dynamics around collinear libration points in the circular restricted three-body problem. In the Earth-Moon system, position-only feedback is used to stabilise the local dynamics, and interesting new multiply-periodic orbits are generated. The in-plane and out-of plane …
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Coupled orbit-attitude mission design in the circular restricted three-body problem
<p>Trajectory design increasingly leverages multi-body dynamical structures that are based on an understanding of various types of orbits in the Circular Restricted Three-Body Problem (CR3BP). Given the more complex dynamical environment, mission applications may also benefit from deeper insight …