Feedback Control Systems

A Fast-Track Guide for Scientists and Engineers

By: Alex Abramovici, Jake Chapsky

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Hardcover | 30 September 2000

At a Glance

Hardcover
212 Pages

Dimensions(cm)
24.13 x 15.88 x 1.91

Hardcover

$249.75

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Feedback Control Systems: A Fast Track Guide for Scientists and Engineers is an essential reference tool for:

Electrical, mechanical and aerospace engineers who are developing or improving products, with a need to use feedback control systems.

Faculty and graduate students in the fields of engineering and experimental science (e.g., physics) who are building their own high-performance measuring/test arrangements.

Faculties teaching laboratory courses in engineering and measurement techniques, and the students taking those courses.

Practising engineers, scientists, and students who need a quick intuitive education in the issues related to feedback control systems.

Key features of Feedback Control Systems:

The contents and the layout of the book are structured to ensure satisfactory proficiency for the novice designer.
The authors provide the reader with a simple yet powerful method for designing control systems using several sensors or actuators.
It offers a comprehensive control system troubleshooting and performance testing guide.

From the reviewers:

Control systems are ubiquitous and their use would be even more widespread if more people were competent in designing them. This book will play a valuable role in expanding the cadre of competent designers.

This is a book that needed to be written, and its presentation is different from any other book on controls intended for a wide community of engineers and scientists. The book breaks the common clich© of style in the control literature that tends toward mathematical formality. Instead, the emphasis is on intuition and practical advice.

The book contains a very valuable and novel heuristic treatment of the subject.

.. one of the best examples of a book that describes the design cycle.

The book will help satisfy the demand among practising engineers for a good introduction to control systems.

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Summary of Notations	p. x
List of Examples	p. x
List of Figures	p. xi
Preface	p. xv
Acknowledgments	p. xxiii
Introduction to Feedback Control Systems
Control System Diagrams	p. 3
Signals in the Feedback Loop	p. 9
Relationships between Signals in a Loop	p. 9
Simplified FCS Diagrams	p. 13
Actuator Output Range	p. 15
Stability	p. 17
Differential Equations, Laplace Transforms and Stability	p. 17
The Nyquist Stability Criterion and Bode Diagrams	p. 19
System Stability: Intuitive Approach	p. 26
Examples	p. 35
Camera for Aircraft Tracking	p. 35
Camera: Range and Lock Acquisition	p. 35
Electrical Motors as Actuators	p. 36
Nd:YAG Laser Frequency Stabilization	p. 39
Free Running Laser Frequency Noise	p. 40
System Concept	p. 41
Tracking Requirement	p. 46
Environmental Parameters	p. 47
In-Band, Out-of-Band Frequency Ranges	p. 47
Design and Implementation
Design Principles	p. 51
Design Approach	p. 51
Assumptions	p. 52
Error Budget	p. 53
Design Sequence	p. 54
Input Data for FCS Design	p. 57
Design and Troubleshooting	p. 59
Sensor Specification	p. 60
Sensor Range	p. 60
Sensor Error	p. 62
Sensor Transfer Function	p. 64
Sensor Nonlinearity	p. 66
Actuator Specification	p. 67
Shaping the Open-Loop Response	p. 68
Compensator Specification	p. 72
Compensator Frequency Response Specification	p. 72
Compensator Hardware Specification	p. 72
Lock Acquisition	p. 75
System Integration: Making It All Work	p. 78
Achieving Closed-Loop Operation	p. 79
Measuring the Open-Loop Frequency Response	p. 89
Measuring the Free-Running Variable	p. 91
Evaluating Tracking Performance	p. 91
Lock Acquisition Efficiency	p. 95
Refining the system	p. 96
Multiple Signal Paths	p. 99
The Need for Multiple Paths: Examples	p. 101
Parallel Actuators for Laser Frequency Noise Suppression	p. 101
Parallel Low Frequency Gain Boost	p. 105
Two Actuators with Nested Loops for Keeping the Optical Path Constant	p. 108
Parallel and Nested Loops: Equivalence and Stability	p. 110
Equivalence	p. 110
Stability Criterion	p. 113
The PID Compensator	p. 114
Choosing a Multiple-Path Configuration	p. 116
Digital Compensators	p. 119
When Should One Use Digital Compensators?	p. 121
Aspects of Digital Compensator Design	p. 123
A/D Converter and Anti-Aliasing Filter	p. 124
Range Matching Amplifier (RMA)	p. 127
Digital Filter Block	p. 127
Digital-to-Analog Converter	p. 132
Smoothening Filter	p. 132
Step-by-Step Specification Recipe	p. 133
Special Topics
Active Null Measurements	p. 137
Two Sensors for One Variable	p. 141
Stability of Control Systems with Two Sensors	p. 143
Noise Considerations	p. 144
Flexible Elements and Stability	p. 147
Effect of Structure Flexibility on Loop Response	p. 147
Resonance-Induced Instability and Ways to Prevent It	p. 150
Appendices	p. 153
Poles and Zeros	p. 153
Stability of Operational Amplifiers	p. 159
OpAmp as Feedback Amplifier	p. 160
Unity Gain Stability and Compensation	p. 164
Driving Capacitive Loads	p. 165
Input Capacitance and Photodiode Preamplifiers	p. 167
Quantization Error	p. 171
Assumptions and Notations	p. 171
Quantization Error Suppression	p. 173
Signal/Error Ratio with Dithering and Filtering	p. 173
Signal Recovery	p. 174
Example	p. 176
Index	p. 179
Table of Contents provided by Syndetics. All Rights Reserved.

Feedback Control Systems

A Fast-Track Guide for Scientists and Engineers

At a Glance

Hardcover

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