Adaptive Antenna Shape Control Using Piezoelectric Actuators
Loading...
Authors
Agrawal, B.N.
Elshafei, M.A.
Song, G.
Subjects
Advisors
Date of Issue
1997
Date
Publisher
Language
Abstract
This paper presents improved techniques for the shape control of composite material plates using piezoelectric actuators. The application of this work is for the shape control of spacecraft antenna to correct surface errors introduced by manufacturing, in-orbit thermal distortion, and moisture. A finite element model has been developed for a composite plate with distributed piezoelectric actuators and sensors. To improve the accuracy of the prediction of plate deformation, a simple higher-order deformation theory is used. The electric potential is treated as a generalized coordinate, allowing it to vary over the element. The applied voltages to the actuators are optimized to minimize the error between the desired shape and the deformed shape. Based on these techniques, two computer programs were developed on finite element modeling and optimization. The analytical results demonstrate the use of piezo-electric actuators for the active shape control of spacecraft antennas.
Type
Description
The article of record as published may be found at http://dx.doi.org/10.1016/S0094-5765(97)00185-9
Series/Report No
Department
Department of Mechanical and Aerospace Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Acta Astronautics Journal, Vol. 40, No. 11, pp. 821-826, 1997.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined
in Title 17, United States Code, Section 101. As such, it is in the
public domain, and under the provisions of Title 17, United States
Code, Section 105, is not copyrighted in the U.S.