PSP Bibliography




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Solar Probe Plus (SPP) autonomous solar array angle control



AuthorBaisden, Carson; Roufberg, Lew;
KeywordsAttitude control; NASA; Orbits; Probes; Solar cell arrays; Space flight; Vibrations (mechanical); Parker Engineering
AbstractThe Solar Probe Plus mission, under NASA s Living with a Star program, will fly a spacecraft (S/C) through the sun s outer corona with orbit perihelia that gradually approach as close as 9.5 solar radii from the center of the sun. The mission will gather data on the processes of coronal heating, solar wind acceleration, and production, evolution and transport of solar energetic particles. The S/C is powered by two actively cooled photovoltaic solar array (S/A) wings. Due to the extreme environments near the sun, the S/C body is protected behind a solar shield. A novel S/A control algorithm autonomously positions the wings to minimize the thermal load while maintaining adequate electrical power by shading the wings in the penumbra behind the solar shield and tilting the wings at a high angle of incidence to the sun. The S/A power and temperature are extremely sensitive to the wing angle, S/C pointing variations, mechanical vibrations, sun distance, and other environmental disturbances and uncertainties of the S/A in these harsh conditions. A system level model was created to integrate the S/A angle control with the spacecraft attitude control system to simulate the disturbances on the control. The S/A angle control algorithm, model, limitations, stability and requirements on the various subsystems are presented in detail. © 2012 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Year of Publication2012
Journal10th Annual International Energy Conversion Engineering Conference, IECEC 2012
Volume
Number of PagesAmerican Institute of Aeronautics and Astronautics (AIAA) -
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