Transactions of Nanjing University of Aeronautics & Astronautics
Design and Analysis of Large Space Membrane Sunshield Structure Based on Origami
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Abstract:
This paper proposes a self-deploying membrane sunshield structure to satisfy the requirements of lightweight， easy unfolding with high expansion ratio， and not requiring the driving power. Four equal length tape springs are used to unfold the Kapton membrane folded with leaf-in and circumferential and the folding ratio is calculated. In order to prevent the problems of hook and damage during the unfolding process， stress and trajectories of the membrane as well as the tape spring modal distribution of the skeleton are analyzed. Finally， a test prototype completes to verify the feasibility of the designment. The results show that by applying the tape springs as the driving method， the membrane unfolding process is smooth， and the membrane will not be damaged. The maximum stress at the membrane crease is about 42.3 MPa which is lower than the allowable stress of the material and the folding ratio reaches 69.4.
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Project Supported:
This study was supported by the Shanghai Institute of Technical Physics， which provided all the experimental equipment and experimental sites for this study.
Clc Number:
V445
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