This paper proposes a method to store a large solar-sail membrane while ensuring repeatability of its stored configuration. The feasibility and effectiveness of the method is verified through a series of sail-storage experiments using 10m-size membranes. Large membranes used as a solar sail should be stored compactly to save the launch volume; in addition, their stored configuration should be sufficiently predictable in order to guarantee reliable deployment in orbit. However, it is difficult to store a large membrane compactly with sufficient repeatability because of the finite thickness of the membrane. This paper classifies the existing and proposed folding patterns that can consider the finite-thickness of membranes. This paper then demonstrates the feasibility of "bulging roll-up" experimentally, and evaluates the repeatability of its stored configuration quantatively.
Accurate rigid body property( RBP ) identification is desired in various industrial fields such as aerospace and automotive engineering , In a past study , we developed a new method based on a modol using suspension on a single elastic wire . Howeve ら it is often impractical to suspend the test structure on only a singlc wire . Thercfbre , to facilitate practical testing , this paper proposes a multi − wire suspension modeL In addition, a method that combines the suspension model with modal curve fittlng is proposed in order to identify accurate RBP of low ・ rigidity structures , The effectiveness is demonstrated using two experimental structures .
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