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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 10 of 10 for “"Solar sails"”.
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Atomic Oxygen Considerations for LEO De-orbit Trajectories Using Solar Sails
<p>Solar sails have the potential to benefit many future space exploration missions, but they lack the heritage required for present-day use. To grow confidence in solar sail technology, they could be deployed on LEO satellites higher than 600 km to help de-orbit the satellite within 25 years upon …
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The Relative Degree of Controllability of Solar Sails in Artificial Lagrangian Orbits
The problem of orbital controllability of solar sails in artificial Lagrangian orbits (ALOs) has received little attention from academics in the field of control. As a result, an important property for missions involving ALOs has not yet been investigated; namely, the degree of controllability …
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Significance of Specific Force Models in Two Applications: Solar Sails to Sun-Earth L4/L5 and GRAIL Data Analysis Suggesting Lava Tubes and Buried Craters on the Moon
… However, non-gravitational forces, such as solar radiation pressure (SRP), can significantly influence the motion of a spacecraft. Incorporating SRP within the dynamical model can assist in estimating the trajectory of a spacecraft with greater precision, in particular, for a spacecraft with …
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Small-Body and Heliophysics Missions using Hybrid Low-Thrust Propulsion
… the momentum of reflected photons of sunlight, solar sails offer a propellant-free alternative but are limited by attitude restrictions and their low thrust. Their improvement has also been inhibited by current knowledge of both materials science and structural engineering. In this dissertation, …
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Investigation Into the Mitigation of the Effects of Uncertain Optical Degradation on an Interplanetary Solar Sail Mission Using a Single Model Update
<p>The renewed academic interest in using solar sails as a source of spacecraft propulsion has been accompanied by a recent fervor of investigations into non-ideal and off-nominal sail performance considerations. One of the most influential considerations, uncertain optical degradation, has been …
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A Comparison of PID and Sliding Mode Controllers When Applied to the Orbit Raising of a Satellite Using Solar Sail Propulsion
<p>Solar Sail spacecraft have become increasingly popular due to their ability to perform long term missions without the need for propellant. Because solar sail propulsion is so unique, most research has been focused on developing new mechanical control techniques. However, it can be argued that …
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Numerical analysis of elastic membrane structures subjected to hydrostatic pressure loading
… in a wide variety of applications, ranging from solar sails, satellites and aircraft, to pneumatic structures, lightweight temporary constructions and biological tissues. In this research project a numerical model has been developed for stress analysis in isotropic elastic membranes undergoing …
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On the dynamics, stability and control of displaced lunar orbits
Now more than a speculative technology, solar sailing offers new capabilities for the design of space missions. This new concept promises to be useful in overcoming the challenges of transportation throughout the solar system. By exploiting the momentum transported by solar photons, solar sails can …
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Coupled orbit-attitude mission design in the circular restricted three-body problem
… mission applications. Additionally, the solar radiation pressure is included and a fully coupled orbit-attitude model is developed. With specific application to solar sails, various guidance algorithms are explored to direct the spacecraft along a desired path, when the mutual interaction …
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Wrinkling of Membrane and Thin Film under Torsion
… in modern technologies. Applications include solar sails and sunshields in space missions, biological membranes and flexible circuit boards. Wrinkling of membrane or a stiff film on a soft substrate may occur in either desired or unwanted patterns. This work tries to obtain some understanding …