Dynamic shape control of conformal antennas

Michael Krommer; Vasundara V. Varadan

doi:10.1117/12.482824

1 August 2003 Dynamic shape control of conformal antennas

Michael Krommer, Vasundara V. Varadan

Proceedings Volume 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control; (2003) https://doi.org/10.1117/12.482824
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

The present paper is concerned with dynamic shape control of conformal antennas on vehicles that may undergo deformations large enough to interfere with antenna performance. If the antenna is conformal to a vehicle or structure is will deform with the vehicle/structure. The objective of this paper is to develop a methodology and simulation technique to control the shape and contour of the antena and to keep it as close to the non-defomed state as possible. Dynamic shape contorl of such surfaces and structures is important to preserve integrity of the electromagnetic performance of the antenna. An exact elimination of the deformation of the whole structure therefore is not required. Our goal is to design the actuator with the purpose of controlling the dynamic deformation of the structure only in the region of the conformal antenna. As an example we consider a plate type structure with the conformal antenna situated in an arbitrary region. Given an external disturbance to the plate, we seek a distributed piezoelectric actuation, which is capable of controlling the motion of the region of the conformal antenna. The goal can be to either eliminate displacements in the region or keep it constant over the region. Our solution of this problem is based on integral formulations for both, the motion imposed by the external distrubance and the motion imposed by the distributed piezoelectric actuation. Comparing the kernels of the integral formation results in a simple solution of the problem: if the distributed piezoelectric actuation conicides with the statically admissible stress due to the external disturbance, the antenna is kep as close to the non-defomed states as possible.

Citation Download Citation

Michael Krommer and Vasundara V. Varadan "Dynamic shape control of conformal antennas", Proc. SPIE 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control, (1 August 2003); https://doi.org/10.1117/12.482824

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available