Mechanical Engineering

By: Wodek Gawronski

Write A Review

Hardcover | 24 June 2008

At a Glance

Hardcover
244 Pages

Dimensions(cm)
23.39 x 15.6 x 1.42

Hardcover

$249.00

or 4 interest-free payments of $62.25 with

Ships in 5 to 7 business days

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.

Industry 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." (Lubomir 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)

Shipping

	Standard Shipping	Express Shipping
Metro postcodes:	$9.99	$14.95
Regional postcodes:	$9.99	$14.95
Rural postcodes:	$9.99	$14.95

Orders over $89.00 qualify for free shipping.

How to return your order

At Booktopia, we offer hassle-free returns in accordance with our returns policy. If you wish to return an item, please get in touch with Booktopia Customer Care.

Additional postage charges may be applicable.

Defective items

If there is a problem with any of the items received for your order then the Booktopia Customer Care team is ready to assist you.

For more info please visit our Help Centre.

Other Editions and Formats

Paperback

Published: 19th November 2010

View Product

Introduction	p. 1
Examples of Antennas and Telescopes	p. 1
NASA Deep Space Network	p. 1
Large Millimeter Telescope	p. 1
ESA Deep Space Antennas	p. 2
Atacama Large Millimeter Array	p. 2
Thirty Meter Telescope	p. 3
Green Bank Telescope	p. 4
Effelsberg Telescope	p. 4
Short Description of the Antenna Control System	p. 5
Velocity Loop	p. 6
Position-Loop	p. 7
Antenna and Telescope Literature	p. 7
References	p. 8
Modeling
Analytical Models	p. 11
Rigid Antenna Model	p. 11
Structural Model	p. 12
Finite-Element Model	p. 12
Modal Model	p. 14
State-Space Model	p. 17
Models with Rigid Body Modes	p. 19
Discrete-Time Model	p. 21
Drive Model	p. 24
Motor Model	p. 24
Reducer Model	p. 25
Drive Model	p. 25
Velocity Loop Model	p. 26
Drive Parameter Study	p. 26
Drive Stiffness Factor	p. 27
Drive Inertia Factor	p. 28
References	p. 30
Models from Identification	p. 31
White Noise Testing of the Antenna	p. 31
Purpose and Conditions	p. 31
Test Input and Output	p. 32
Test Configuration	p. 32
Data Processing	p. 34
Basic Relationships for the Discrete-Time Data	p. 37
Identification of the Velocity Loop Model	p. 38
Description of the Velocity Loop Model	p. 39
Identification of the Velocity Loop Model	p. 39
A Comparison of the Analytical and Identified Models	p. 41
Azimuth Model Depends on the Antenna Elevation Position	p. 41
Fundamental Frequency Depends on Antenna Diameter	p. 43
References	p. 44
Model Reduction	p. 45
Why Reduction?	p. 45
Balanced Model Reduction	p. 45
Modal Model Reduction	p. 47
Norms of a Single Mode	p. 47
Norms of a Structure	p. 48
Antenna Model Reduction	p. 49
References	p. 50
Wind Disturbance Models	p. 51
Steady-State Wind Disturbance Model	p. 51
Dimensionless Wind Torques	p. 52
Obtaining Wind Torques from Field Data	p. 54
Comparing Wind Tunnel Results and the Field Data	p. 56
Wind Gusts Disturbance Models	p. 59
Model of Wind Forces Acting on the Dish	p. 60
Model of Wind Torque Acting at the Drives	p. 64
Algorithm to Generate a Time Profile of Wind Gusts Torque	p. 65
Model of Wind at the Velocity Input	p. 66
Algorithm to Generate Time Profile of Wind at the Velocity Input	p. 67
The Equivalence of Wind Torque and Wind Velocity Models	p. 67
Closed Loop Pointing Accuracy with Wind Gusts Disturbances	p. 68
References	p. 70
Control
Preliminaries to Control	p. 73
Performance Criteria	p. 73
Transformations of the Velocity Loop Model	p. 77
Transformation into Modal Coordinates	p. 78
Antenna Position as the First State	p. 78
Augmentation with the Integral of the Position	p. 78
References	p. 79
PI and Feedforward Controllers	p. 81
Properties of the PI Controller	p. 81
Closed Loop Transfer Functions	p. 83
The Proportional Gain Analysis	p. 83
The Integral Gain Analysis	p. 85
PI Controller Tuning Steps	p. 86
Closed Loop Equations of a Flexible Antenna with a PI Controller	p. 87
Performance of the PI Controller	p. 87
Performance Characteristics	p. 87
Limits of Performance	p. 90
Feedforward Controller	p. 91
References	p. 93
LQG Controller	p. 95
Properties of the LQG Controller	p. 95
LQG Controller Description	p. 95
Tracking LQG Controller	p. 98
Closed Loop Equations of the Tracking LQG Control System	p. 101
LQG Weights	p. 101
Resemblance of the LQG and PI Controllers	p. 104
Properties of the LQG Weights	p. 105
Limits of the LQG Gains	p. 107
LQG Controller Tuning Steps	p. 108
Performance of the LQG Controller	p. 110
Summary of the Antenna Servo Performance Characteristics	p. 110
Performance of the DSN Antennas with LQG Controllers	p. 111
Disturbance Rejection Properties and the Position-Loop Bandwidth	p. 113
Performance Comparison of the PI and LQG Controllers	p. 115
Limits of Performance	p. 117
Tuning a LQG Controller Using GUI	p. 117
Selecting LQG Weights	p. 117
GUI for the LQG Controller Tuning	p. 119
Fine Tuning of the LQG Controller	p. 121
LQG Controller in the Velocity Loop	p. 124
Position Loop Bandwidth Depends on the Velocity Loop	p. 124
Four Control Configurations	p. 127
PP Control System	p. 127
PL Control System	p. 129
LP Control System	p. 132
LL Control System	p. 132
References	p. 133
H∞ Controller	p. 135
Definition and Gains	p. 135
Tracking H_∞ Controller	p. 138
Closed-Loop Equations of the Tracking H_∞ Controller	p. 138
34-M Antenna Example	p. 139
Limits of Performance	p. 141
References	p. 142
Single Loop Control	p. 145
Rigid Antenna	p. 145
Rigid Antenna with Velocity and Position Loops	p. 145
Rigid Antenna with Position Loop Only	p. 147
Simulation Results	p. 148
34-M Antenna	p. 149
References	p. 155
Non-Linear Control	p. 157
Velocity and Acceleration Limits	p. 157
Command Preprocessor	p. 157
Anti-Windup Technique	p. 162
Friction	p. 166
Dry Friction Model	p. 168
Low-Velocity Tracking Using Dither	p. 170
Non-linear Simulation Results	p. 173
Backlash	p. 174
Backlash and Its Prevention	p. 175
The Velocity Loop Model with Friction and Backlash	p. 177
References	p. 181
RF Beam Control	p. 183
Selecting the RF Beam Controller	p. 183
Monopulse	p. 187
Command following	p. 187
Disturbance Rejection Properties	p. 188
Stability Due to the Gain Variation	p. 190
Performance Simulations: Linear Model	p. 190
Performance Simulations: Nonlinear Model	p. 191
Scanning	p. 194
Conical Scan	p. 194
Sliding Window Conscan	p. 200
Lissajous Scan	p. 201
Rosette Scan	p. 204
Performance Evaluation	p. 206
References	p. 209
Track-Level Compensation	p. 211
Description of the Track-Level Problem	p. 211
Collection and Processing of the Inclinometer Data	p. 213
Estimating Azimuth Axis Tilt	p. 215
Creating the TLC Table	p. 217
Determining Pointing Errors from the TLC Table	p. 219
Antenna Pointing Improvement Using the TLC Table	p. 221
References	p. 222
Index	p. 223
Table of Contents provided by Publisher. All Rights Reserved.

Mechanical Engineering

At a Glance

Hardcover

Industry Reviews

Shipping

How to return your order

Defective items

You Can Find This Book In

Other Editions and Formats

Paperback

More in Astronomical Observation & Observatories

Space Hazards

Asteroids, solar flares and cosmic threats facing Earth

Night Sky Almanac 2026

A Stargazer's Guide

Inside the Stargazer's Palace

The Transformation of Science in 16th-Century Northern Europe

The Backyard Astronomer's Guide

2027 Guide to the Night Sky: Southern Hemisphere

A month-by-month guide to exploring the skies above Australia, New Zealand and South Africa

2026 Guide to the Night Sky Southern Hemisphere

A month-by-month guide to exploring the skies above Australia, New Zealand and South Africa

2025 Guide To The Night Sky Southern Hemisphere

A Month-by-month Guide To Exploring The Skies Above Australia, New Zealand And South Africa

Webb's Universe

The Space Telescope Images That Reveal Our Cosmic History

Reflections on Observational Astronomy in the Medieval Islamic Period

Variorum Collected Studies

Relativistic Photonics in Optical Signal Processing

SpringerBriefs in Physics

Galaxies

A Beginner's Guide to Exploring Galaxies

2027 Guide to the Night Sky [North America]

A month-by-month guide to exploring the skies above North America

The Royal Observatory, Greenwich, 1881-1939

Astronomy, Astronomers and Heritage in a Changing World

The Royal Observatory, Greenwich, 1881-1939

Astronomy, Astronomers and Heritage in a Changing World

Babylonian Mathematical Astronomy

Planetary Tables

The Norwegian Expedition 1899-1900 for the Study of the Aurora Borealis

A Commented Translation of Kristian Birkeland's First Book on the Aurora

A Century of Cosmic Discoveries

Heliophysics and Space Physics, Astrophysics and Cosmology

Planetary Astronomy in the Classical Islamic Period

Wondering About the Wanderers

The NASA Psyche Mission

The First Up-Close Exploration of a Metal-Rich World

DK Chasing the Northern Lights

Everything You Need to Know to See Nature's Greatest Light Show

The Meteorite Hunters

On the Trail of Extraterrestrial Treasures and the Secrets Inside Them

Stargazing for Beginners

Explore the Wonders of the Night Sky

Astronomical Spectroscopy

An Introduction To The Atomic And Molecular Physics Of Astronomical Spectra (2nd Edition)

The Meteorite Hunters

On the Trail of Extraterrestrial Treasures and the Secrets Inside Them

This product is categorised by