Embedded Fiber-Optic Sensing for Solar and Electric Sails

Luna, teamed with Ms. Sue Orsquo;Brien at The University of Alabama Huntsville, is proposing to utilize High-Definition Shape Sensing (HD-Shape) to optimize the control of solar and electric sails. Solar and electric sails use lightweight material with large cross-sections to transfer momentum of solar radiation into directional thrust. Control is performed by adjusting the center of mass (CM) with respect to the center of pressure (CP). Utilizing the technology proposed here, the shape of a sail can be controlled using feedback regarding its actual position to align CM and CP and achieve the desired direction of thrust. HD-Shape enables the position and orientation of a multi-core optical fiber to be measured independent of the structure it is attached to, with the advantage of being immune to the electromagnetic and radiation environment present in space.nbsp; During Phasenbsp;I the team will demonstrate boom arm curvature measurements for providing active feedback to boom controls systems and begin designing an architecture for a low mass, low power system suitable for space deployment. Phase II will begin prototyping the electronics resulting in a system that can be tested by NASA.