Energy managed electric propulsion methods and systems for stationkeeping satellites
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United States of America Patent
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Jun 24, 2003
Grant Date -
Apr 24, 2003
app pub date -
Oct 15, 2001
filing date -
Oct 15, 2001
priority date (Note) -
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Abstract
An electric propulsion (EP) device is used to enable, a stationkeeping satellite to track a prescribed stationkeeping Earth orbit. EP propellant and electric power are throttled to vary the thrust and specific impulse of the EP device. A solar array provides electrical power during each Earth day cycle with excess power above that needed by the spacecraft stored by a battery. Software control manages the voltage, current and burn time to minimize propellant usage and impact to the system.
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