Thursday, 16 January 2014

[B286.Ebook] Download PDF Modeling and Control of Antennas and Telescopes (Mechanical Engineering Series), by Wodek Gawronski

Download PDF Modeling and Control of Antennas and Telescopes (Mechanical Engineering Series), by Wodek Gawronski

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Modeling and Control of Antennas and Telescopes (Mechanical Engineering Series), by Wodek Gawronski

Modeling and Control of Antennas and Telescopes (Mechanical Engineering Series), by Wodek Gawronski



Modeling and Control of Antennas and Telescopes (Mechanical Engineering Series), by Wodek Gawronski

Download PDF Modeling and Control of Antennas and Telescopes (Mechanical Engineering Series), by Wodek Gawronski

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Modeling and Control of Antennas and Telescopes (Mechanical Engineering Series), by Wodek Gawronski

Mechanical engineering, and engineering discipline born of the needs of the industrial revolution, is once again asked to do its substantial share in the call for industrial renewal. The general call is urgent as we face profound issues of productivity and competitiveness that require engineering solutions, among others. The Mechanical Engineering Series is a series featuring graduate texts and research monographs intended to address the need for information in contemporary areas of mechanical engineering. The series is conceived as a comprehensive one that covers a broad range of c- centrations important to mechanical engineering graduate education and research. We are fortunate to have a distinguished roster of series editors, each an expert in one of the areas of concentration. The names of the series editors are listed on page vi of this volume. The areas of concentration are applied mechanics, biomechanics, computational mechanics, dynamic systems and control, energetics, mechanics of materials, processing, thermal science, and tribology. Preface This book is based on my experience with the control systems of antennas and radiotelescopes. Overwhelmingly, it is based on experience with the NASA Deep Space Network (DSN) antennas. It includes modeling the antennas, developing control algorithms, eld testing, system identi cation, performance evaluation, and 1 troubleshooting. My previous book emphasized the theoretical aspects of antenna control engineering, while this one describes the application part of the antenna control engineering.

  • Sales Rank: #4092167 in Books
  • Published on: 2008-06-24
  • Original language: English
  • Number of items: 1
  • Dimensions: 9.21" h x .56" w x 6.14" l, 1.14 pounds
  • Binding: Hardcover
  • 228 pages

Review

From the reviews:

"The book presents the author’s research and experience in the area of antenna modeling, dynamics, and control. The analytical approach and the experimental approach to the subject are explained. The text is clearly written up-to-date authoritative reference describing the application part of the antenna control engineering. The monograph is primarily addressed to the antenna, telescope, and radiotelescope engineers, as well as researchers and students in motion control and mechatronics." (Lubom�r Bakule, Zentralblatt MATH, Vol. 1159, 2009)

“This book is addressed to engineers and students interested in motion control and primarily to antenna, telescope, and radio telescope engineers. It is based on the author’s experience with the NASA Deep Space Network antennas. The first part of the book covers the modeling of antennas, while the second part covers control … .” (IEEE Control Systems Magazine, Vol. 30, February, 2010)

From the Back Cover

Modeling and Control of Antennas and Telescopes presents the author’s research and field experience in the area of antenna modeling, dynamics, and control. The required spacecraft tracking accuracy of 1 mdeg was the impetus for the new approaches to the antenna controls that use model based controllers (LQG and H� ). Consequently, modeling also required a new approach using system identification techniques. Most of the material presented is new in the telescope industry. The methods have been not only analyzed and tested, but actually implemented, giving confidence in the final result, which is significantly increased antenna pointing accuracy.

The author explains two different approaches to telescope modeling: analytical and experimental. The analytical approach combines the structural and drive model, using Matlab and Simulink. The experimental, uses the test data to obtain the equations of the antenna model. Both models are excessively large and the model reduction techniques included make the model size small enough for the controller design purposes. The book also covers the wind models based on the wind tunnel data (steady-state), and on the field data (gusts) since wind gusts are the main antenna disturbance.

The book shows the PI and feedforward controller tuning and their performance as a benchmark for measuring the pointing improvement when the LQG and H� are implemented. The properties, performance, and tuning of the LQG and H� are also presented. The material explains the nonlinear control issues such as velocity and acceleration limits, friction, and backlash. It also covers RF beam control techniques (scanning and monopulse), and the open loop control of the track level unevenness.

Modeling and Control of Antennas and Telescopes serves as a useful reference for students and engineers in the area of antenna modeling, dynamics, and control.

Most helpful customer reviews

4 of 4 people found the following review helpful.
Very good coverage of antenna and altazimuth telescope control
By C. J. Carter
This book fills an interesting niche in the field. Large antennas and large telescope structures are very similar, and the fundamental approaches used to understand their performance are the same. The author does a commendable job of presenting the necessary information in a clear and understandable way; let down slightly by a few typos and some slightly weak error checking and editing (this book is not cheap - this sort of thing should be picked up in the proofing) - but despite this it is well worth the money.

I work for a large telescope project and this book is worth purchasing simply to get the perspective of an experienced practitioner in the field, and to see common questions ('Is a velocity loop really necessary?') comprehensively yet compactly addressed. Overall, an interesting and worthwhile book - would that more engineers in the field could - and would - produce something similar. The discipline would be the richer for it.

See all 1 customer reviews...

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