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  • Book
  • © 2008

Modeling and Control of Antennas and Telescopes

Authors:

  • Presents design and implementation of the modern modeling and control theories in the antenna and telescope industrial application (e.g., system identification, model reduction, LQG and H_infinity controllers)

  • Shows not only the analysis but the implementation results (all the presented methods have been implemented and are in use at the NASA Deep Space Network antennas)

  • Includes wide use of Matlab and Simulink

  • Shows the improvement of pointing precision of the antennas and telescopes by factor 10, when the presented techniques are applied

  • Presents how to deal with the nonlinear phenomena

  • Covers techniques for the RF beam control (monopulse and conscan)

  • Includes supplementary material: sn.pub/extras

Part of the book series: Mechanical Engineering Series (MES)

Buying options

eBook USD 129.00
Price excludes VAT (USA)
  • ISBN: 978-0-387-78793-0
  • Instant PDF download
  • Readable on all devices
  • Own it forever
  • Exclusive offer for individuals only
  • Tax calculation will be finalised during checkout
Softcover Book USD 169.99
Price excludes VAT (USA)
Hardcover Book USD 219.99
Price excludes VAT (USA)

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Table of contents (13 chapters)

  1. Front Matter

    Pages i-xv
  2. Introduction

    1. Front Matter

      Pages 1-1
    2. Introduction

      • Wodek Gawronski
      Pages 1-8
  3. Modeling

    1. Front Matter

      Pages 9-9
    2. Analytical Models

      • Wodek Gawronski
      Pages 11-30
    3. Models from Identification

      • Wodek Gawronski
      Pages 31-44
    4. Model Reduction

      • Wodek Gawronski
      Pages 45-50
    5. Wind Disturbance Models

      • Wodek Gawronski
      Pages 51-70
  4. Control

    1. Front Matter

      Pages 71-71
    2. Preliminaries to Control

      • Wodek Gawronski
      Pages 73-79
    3. PI and Feedforward Controllers

      • Wodek Gawronski
      Pages 81-93
    4. LQG Controller

      • Wodek Gawronski
      Pages 95-134
    5. H ∞ Controller

      • Wodek Gawronski
      Pages 135-143
    6. Single Loop Control

      • Wodek Gawronski
      Pages 145-155
    7. Non-Linear Control

      • Wodek Gawronski
      Pages 157-182
    8. RF Beam Control

      • Wodek Gawronski
      Pages 183-209
    9. Track-Level Compensation

      • Wodek Gawronski
      Pages 211-222
  5. Back Matter

    Pages 223-225

About this book

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.

Keywords

  • Gawronski
  • Matlab
  • RF beam pointing
  • Radar
  • Radiotelescopes
  • Simulink
  • antenna/telescope control system
  • antenna/telescope modeling
  • control theory
  • design
  • modeling
  • monopulse and conscan
  • radar modeling
  • structural dynamics

Reviews

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." (Lubomír 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)

Authors and Affiliations

  • California Institute of Technology, Jet Propulsion Laboratory, Pasedena, USA

    Wodek Gawronski

Bibliographic Information

Buying options

eBook USD 129.00
Price excludes VAT (USA)
  • ISBN: 978-0-387-78793-0
  • Instant PDF download
  • Readable on all devices
  • Own it forever
  • Exclusive offer for individuals only
  • Tax calculation will be finalised during checkout
Softcover Book USD 169.99
Price excludes VAT (USA)
Hardcover Book USD 219.99
Price excludes VAT (USA)