Abstract
During the deployment of a spin-type heliogyro solar sail, its moment of inertia increases, thereby leading to a decrease in the angular velocity of the system. Because a minimum angular velocity is required to prevent the solar-elastic instability of the fully deployed rotating ultrathin blades, the moment induced by solar radiation pressure on the deployed blade is intentionally driven. In this study, a possible control scenario for the full deployment of heliogyro blades is investigated by controlling the blade pitch angle and the rotation speed of the blade reel. A successful simulation shows that the heliogyro blade can be fully deployed at the desired terminal angular velocity with open-loop spin control and with optimum gains by a generic algorithm, as well as adaptive spin control.
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