Viscoelastic strain-energy hinge for solar array deployment

Moon K. Kwak; Wan-Kyu Ra; Kwang Joon Yoon

doi:10.1117/12.351570

9 July 1999 Viscoelastic strain-energy hinge for solar array deployment

Moon K. Kwak, Wan-Kyu Ra, Kwang Joon Yoon

Proceedings Volume 3674, Smart Structures and Materials 1999: Industrial and Commercial Applications of Smart Structures Technologies; (1999) https://doi.org/10.1117/12.351570
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

This paper is concerned with the viscoelastic strain-energy hinge for solar array deployment. The original strain-energy hinge proposed by TRW for solar array deployment was made of strip measures. Due to its structural simplicity, the strain-energy hinge has been considered as an alternative to the torsional spring type deployment mechanism. However, theoretical modeling of the strain-energy hinge is extremely difficult because of its nonlinear pre- and post-buckling dynamic behavior. To investigate its dynamic characteristics, series of buckling and deployment tests on a single strain-energy hinge and a solar array structure equipped with strain-energy hinge have been conducted. The deployment test results show that there remain residual vibrations after deployment, which are resulted from the rapid deployment and the bending flexibility of the strain- energy hinge. We propose the use of viscoelastic material embedded between the layers of the strip measure to increase the passive damping. It results in less residual vibrations and smooth deployment. Experimental results show that viscoelastic strain-energy hinge ins superior to the ordinary strain-energy hinge in deployments. Based on the experiments on the single strain-energy hinge, an equivalent 1D torsional spring model is proposed. Simulation results based on the equivalent model are fairly in good agreement with experimental results.

Citation Download Citation

Moon K. Kwak, Wan-Kyu Ra, and Kwang Joon Yoon "Viscoelastic strain-energy hinge for solar array deployment", Proc. SPIE 3674, Smart Structures and Materials 1999: Industrial and Commercial Applications of Smart Structures Technologies, (9 July 1999); https://doi.org/10.1117/12.351570

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