ECAPS - Eddy Current Approach and Proximity Satellites

Multiple, energized coils in a small satellite will generate eddy currents in the skin of the International Space Station (ISS). This will create repulsive forces between the satellite and the ISS. Coil configurations control tip/tilt of the satellite, while lateral forces can be generated using linear induction motor concepts where the coils are energized at shifted phases to make it appear that there is a traveling magnetic field. Creating attractive forces, to balance the repulsive forces for controlled flight of the satellite, will be accomplished through a frequency dependent phase relationship between the coil current and the eddy current. This is complimentary to previous work done by another researcher. The project will begin with developing the models and performing experimental verifications of the interaction of a single coil with a conductive sheet, then expand to coupled coils in order to demonstrate lateral forces. Feasibility and capability of the ECAPS will be determined, and peer reviewed journal paper and final report will be published. This technology would provide a critical capability in the Space Infrastructure area by offering a non-contact robotic servicing spacecraft for an aging ISS, Gateway and other spacecraft. It could also address a significant challenge in the Space Exploration area by providing a spacecraft design capable of maneuvering around asteroids with significant metallic content. A non-contact robotic servicing spacecraft would reduce the need for spacewalks and the electromagnetic propulsion would not have the consumable fuel limitations nor the damaging potential of a chemically propelled spacecraft. Additionally, the electromagnetic propulsion could be used with metallic asteroids to allow a mining spacecraft to maneuver around the surface and stick to it – a difficult challenge in very low gravity.

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