Astronomy and Astrophysics – Astronomy
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21641308n&link_type=abstract
American Astronomical Society, AAS Meeting #216, #413.08; Bulletin of the American Astronomical Society, Vol. 41, p.823
Astronomy and Astrophysics
Astronomy
Scientific paper
The purpose of this project is to discuss the time of a transfer trajectory by consideration of the Earth's shadow. The time of transfer trajectory of a sail spacecraft was determined by consideration of the Earth's shadow and it was compared with the results in a case where the Earth's shadow was not taken into account. The solar sail spacecraft was demonstrated to be oriented in such a way that the solar force applies in one appropriate direction. The mathematical concept and feature shape of solar sail spacecraft were proven as correct design approaches. The equations of motion that were developed in the project were proven in correct format for transfer trajectory approach by means of the purposed CN (Cyrus Nejat) Equations of Motion. Four important comments were discussed from the observed results. The problem statement was depened along with appropriate assumptions. The solar sail craft was defined appropriately. The equations of motion were determined in order to evaluate the transfer trajectory of solar sail spacecraft. In this case, the time of flight was determined for two cases: with Earth's shadow, and without Earth's shadow. The results showed that the time of fight with the Earth's shadow consideration is higher than the time of fight without the Earth's shadow, but it had close responses due to small amount of force from the solar radiation pressure. The future of this project should also apply the Moon's shadow in the problem statement and determine the shadow of the Earth as it can be seen in a cone zone. There are also appropriate control system devices that should be designed for attitude determination. It is also necessary to apply appropriate damper system, composite and smart materials to remedy vibration problems.
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