Spatial Filtering for the Control of Smart Structures An Introductio
This book develops and details rigorous design methodologies and performance measures for the control of modern Smart Structures. The spatially distributed/continuum or distributed parameter nature of such structures makes it difficult to apply modern lum
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James E. Hubbard, Jr.
Spatial Filtering for the Control of Smart Structures An Introduction
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Prof. James E. Hubbard, Jr. University of Maryland 100 Exploration Way Hampton, VA 23666-6147 USA [email protected] [email protected]
ISBN 978-3-642-03803-7 e-ISBN 978-3-642-03804-4 DOI 10.1007/978-3-642-03804-4 Springer Heidelberg Dordrecht London New York Library of Congress Control Number: 2009938110 © Springer-Verlag Berlin Heidelberg 2010 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Cover design: WMXDesign GmbH, Heidelberg Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com)
To the Young Dragons – James, Drew and Jordan and The Fair Princess – Adrienne and The Ruler of the Kingdom– The Alpha and Omega
I understood that to grow a dream You need more than the one I was. You need the Believe of childhood The Do of Youth and the Think of Experience. - A Tale of Wonder, Wisdom and Wishes - Susan V. Bosak
An Historical Prologue and Preface
What follows is my personal perspective on early events that played a significant role in the formation of the field now known as Smart Structures. It is by no means meant to be all inclusive or definitive in any way, but merely an account of personal experiences that ultimately lead to the development of the material contained and presented herein. On March 23, 1983 then President Ronald Reagan announced his intentions to develop a new system to reduce the threat of nuclear attack and end the strategy of mutual deterrence in an address to the nation entitled, Address to the Nation on Defense and National Security. The system he proposed became known as “Star Wars,” after the popular movie, because it was meant to provide a protective shield over the nation from space. His speech mobilized the entire nation on a research and development path toward this end. Investigations were conducted into new areas such as space based radar, large aperture antennae and large flexible mirror concepts. These proposed systems represented an entirely new class of structures that proved to provide new challenges in materials, structures, control systems and modeling. For example antennae needed to monitor large areas of real estate in the continental Unite
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