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Title: Wirelessly controllable inflated electroactive polymer (EAP) reflectors
Authors: Bao, Xiaoqi
Bar-Cohen, Yoseph
Chang, Zensheu
Sherrit, Stewart
Badescu, Mircea
Keywords: Electroactive polymer (EAP)
inflatable membrane mirrors
hin film antennas
controllable reflectors
Issue Date: 7-Mar-2005
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2005.
Citation: Electroactive Polymer Actuators and Devices (EAPADI ) Conference, Smart Structures and Materials Symposium, San Diego, California, March 7-10, 2005
Abstract: Inflatable membrane reflectors are attractive for deployable, large aperture, lightweight optical and microwave systems in micro-gravity space environment. However, any fabrication flaw or temperature variation may results in significant aberration of the surface. Even for a perfectly fabricated inflatable membrane mirror with uniform thickness, theory shows it will form a Hencky curve surface but a desired parabolic or spherical surface. Precision control of the surface shape of extremely flexible membrane structures is a critical challenge for the success of this technology. Wirelessly controllable inflated reflectors made of electroactive polymers (EAP) are proposed in this paper. A finite element model was configured to predict the behavior of the inflatable EAP membranes under pre-strains, pressures and distributed electric charges on the surface. To explore the controllability of the inflatable EAP reflectors, an iteration algorism was developed to find the required electric actuation for correcting the aberration of the Hencky curve to the desired parabolic curve. The correction capability of the reflectors with available EAP materials was explored numerically and is presented in this paper.
Appears in Collections:JPL TRS 1992+

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