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Energy-Efficient Active Reflectors with Improved Mechanical Stability and Improved Thermal Performance

Bradford, Samuel Case and Hofmann, Douglas C. and Roberts, Scott N. and Steeves, John B. and Wojnar, Charles S. and Kochmann, Dennis M. (2016) Energy-Efficient Active Reflectors with Improved Mechanical Stability and Improved Thermal Performance. In: 3rd AIAA Spacecraft Structures Conference. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2016-0702. ISBN 978-1-62410-394-0. https://resolver.caltech.edu/CaltechAUTHORS:20190828-084449277

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Abstract

Controlling surface wavefront of apertures using a distributed array of actuators to mechanically correct the surface has been widely studied. Traditional active reflector systems require a sustained voltage profile which holds each actuator at a specific strain state to control the surface of the reflector. Each actuator, typically piezoelectric, draws a small amount of power under nominal operation. This power draw is small, but can complicate mission designs that depend on a cryogenic primary reflector surface. In this study we have extended the results of our previous work to include nonlinear piezoelectric actuation for active reflector systems. By deliberately operating in the nonlinear regime, it is possible to deform the actuators in such a way that the reflector surface maintains its corrected shape without sustained power. Demonstration of unpowered primary mirror wavefront control has positioned the technology as suitable for cryogenic/infrared systems. This report describes a nonlinear piezoelectric characterization campaign, and the associated nonlinear energy-efficient active reflector demonstration.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2016-0702DOIArticle
ORCID:
AuthorORCID
Kochmann, Dennis M.0000-0002-9112-6615
Additional Information:© 2016 American Institute of Aeronautics and Astronautics. Published Online: 1 Jan 2016.
Group:GALCIT
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2016-0702
Record Number:CaltechAUTHORS:20190828-084449277
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190828-084449277
Official Citation:Energy-Efficient Active Reflectors with Improved Mechanical Stability and Improved Thermal Performance. Samuel C. Bradford, Douglas C. Hofmann, Scott N. Roberts, John B. Steeves, Charles S. Wojnar, and Dennis M. Kochmann. 3rd AIAA Spacecraft Structures Conference. January 2016. https://doi.org/10.2514/6.2016-0702
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98285
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:28 Aug 2019 16:08
Last Modified:03 Oct 2019 21:39

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