Analytical evaluation of effective solar sail attitude control using metasurfaces for deep space exploration

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dc.contributor Sood, Rohan
dc.contributor.advisor Kim, Seongsin
dc.contributor.advisor Kung, Patrick Ullery, Dylan 2018-12-14T18:11:52Z 2018-12-14T18:11:52Z 2018
dc.identifier.other u0015_0000001_0003087
dc.identifier.other Ullery_alatus_0004M_13537
dc.description Electronic Thesis or Dissertation
dc.description.abstract We examine the theoretical implications of incorporating metasurfaces on solar sails, and the effect they can have on the forces and torques applied to the sail. This would enable a significant enhancement over state-of-the- art attitude control by demonstrating a novel, propellant-free and low mass approach to induce a roll torque on the sail, which is a current limitation in present state-of-the-art technology. We do so by utilizing anomalous optical reflections from the metasurfaces to generate a net in-plane lateral force. This can lead to a net torque along the roll axis of the sail, in addition to the other spatial movements exhibited by the sail from solar radiation pressure. We characterize this net lateral force as a function of incidence angle. In addition, the influence of the phase gradients and anomalous conversion efficiency characteristics of the metasurfaces are independently considered. The optimum incidence angle that corresponded with the maximum net lateral-to-normal force ratio was found to be -30° for a metasurface exhibiting 75% anomalous conversion efficiency with a phase gradient of 0.71k0. Upon comparison with the force and torque plots from current reflection control devices such as those that were utilized on IKAROS, the anomalously reflecting metasurfaces offer a considerable increase in torque along the roll axis. This is important because up until this point, roll control has been a particularly difficult aspect of solar sail attitude control to manipulate without the use of reaction wheels or propellant. The torque along the roll axis can reach values of torque as high as 358 μN m under ideal conditions.
dc.format.extent 94 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Aerospace engineering
dc.subject.other Electromagnetics
dc.subject.other Optics
dc.title Analytical evaluation of effective solar sail attitude control using metasurfaces for deep space exploration
dc.type thesis
dc.type text University of Alabama. Department of Electrical and Computer Engineering Electrical and Computer Engineering The University of Alabama master's M.S.

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