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Observers in Control Systems
 
 

Observers in Control Systems, 1st Edition

A Practical Guide

 
Observers in Control Systems, 1st Edition,George Ellis,ISBN9780122374722
 
 
 

  

Academic Press

9780122374722

9780080513010

259

235 X 187

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Key Features

* Teaches observers and Kalman filters from an intuitive perspective

* Explains how to reduce control system susceptibility to noise

* Shows how to design an adaptive controller based on estimating parameter variation using observers
Shows how to improve a control system's ability to reject disturbances

* Key topics are demonstrated with PC-based models of control systems. The models are written in both MatLabĀ® and ModelQ; models are available free of charge

Description

Observers are digital algorithms that combine sensor outputs with knowledge of the system to provide results superior to traditional structures, which rely wholly on sensors. Observers have been used in selected industries for years, but most books explain them with complex mathematics. This book uses intuitive discussion, software experiments, and supporting analysis to explain the advantages and disadvantages of observers. If you are working in controls and want to improve your control systems, observers could be the technology you need and this book will give you a clear, thorough explanation of how they work and how to use them.

Control systems and devices have become the most essential part of nearly all mechanical systems, machines, devices and manufacturing systems throughout the world. Increasingly the efficiency of production, the reliability of output and increased energy savings are a direct result of the quality and deployment of the control system. A modern and essential tool within the engineer's kit is the Observer which helps improve the performance and reduce the cost of these systems.

George Ellis is the author of the highly successful Control System Design Guide (2nd Edition). Unlike most controls books, which are written by control theorists and academics, Ellis is a leading engineer, designer, author and lecturer working in industry directly with the users of industrial motion control systems. Observers in Control Systems is written for all professional engineers and is designed to be utilized without an in-depth background in control theory. This is a "real-world" book which will demonstrate how observers work and how they can improve your control system. It also shows how observers operate when conditions are not ideal and teaches the reader how to quickly tune an observer in a working system.

Software Available on line: A free updated and enhanced version of the author's popular Visual ModelQ allows the reader to practice the concepts with Visual ModelQ models on a PC. Based on a virtual laboratory, all key topics are demonstrated with more than twenty control system models. The models are written in Visual ModelQ ,and are available on the Internet to every reader with a PC.

George Ellis

George Ellis is Director of Technology Planning and Chief Engineer of Servo Systems at Kollmorgen Corporation, a leading provider of motion systems and components for original equipment manufacturers (OEMs) around the globe. He has designed an applied motion control systems professionally for over 20 years He has written two well-respected books with Academic Press, Observers in Control Systems and Control System Design Guide, now in its third edition. He has contributed articles on the application of controls to numerous magazines, including Machine Design, Control Engineering, Motion Systems Design, Power Control and Intelligent Motion, and Electronic Design News.

Affiliations and Expertise

Kollmorgen Corporation, USA

View additional works by George Ellis

Observers in Control Systems, 1st Edition

Acknowledgements
Safety
Chapter 1 Control Systems and the Role of Observers
1.1 Overview
1.2 Preview of Observers
1.3 Summary of the Book
Chapter 2 Control-System Background
2.1 Control-System Structures
2.2 Goals of Control Systems
2.3 Visual ModelQ Simulation Environment
2.4 Software Experiments: Introduction to Visual ModelQ
2.5 Exercises
Chapter 3 Review of the Frequency Domain
3.1 Overview of the s-Domain
3.2 Overview of the z-Domain
3.3 The Open-Loop Method
3.4 A Zone-Based Tuning Procedure
3.5 Exercises
Chapter 4 The Luenberger Observer: Correcting Sensor Problems
4.1 What Is a Luenberger Observer?
4.2 Experiments 4A-4C: Enhancing Stability with an Observer
4.3 Predictor-Corrector Form of the Luenberger Observer
4.4 Filer Form of the Luenberger Observer
4.5 Designing a Luenberger Observer
4.6 Introduction to Tuning an Observer Compensator
4.7 Exercises
Chapter 5 The Luenberger Observer and Model Inaccuracy
5.1 Model Inaccuracy
5.2 Effects of Model Inaccuracy
5.3 Experimental Evaluation
5.4 Exercises
Chapter 6 The Luenberger Observer and Disturbances 1
6.1 Disturbances
6.2 Disturbance Response
6.3 Disturbance Decoupling
6.4 Exercises
Chapter 7 Noise in the Luenberger Observer
7.1 Noise in Control Systems
7.2 Sensor Noise and the Luenberger Observer
7.3 Noise Sensitivity when Using Disturbance Decoupling
7.4 Reducing Noise Susceptibility in Observer-Based Systems
7.5 Exercises
Chapter 8 Using the Luenberger Observer in Motion Control
8.1 The Luenberger Observers in Motion Systems
8.2 Observing Velocity to Reduce Phase Lag
8.3 Using Observers to Improve Disturbance Response
8.4 Exercises
References
Appendix A Observer-Based Resolver Conversion in Industrial Servo Systems
Introduction
Resolvers and Traditional RDC
Converting the Signal
Observers
Applying the Observer to RDC
Advantages of Observer-Based Conversion
Conclusion
References
Appendix B Cures for Mechanical Resonance in Industrial Servo Systems
Introduction
Two-Part Transfer Function
Low-Frequency Resonance
Velocity Control Law
Methods of Correction Applied to Low-Frequency Resonance
Conclusion
Acknowledgements
References
Appendix C European Symbols for Block Diagrams
Part I: Linear Functions
Part II: Nonlinear Functions
Appendix D Development of the Bilinear Transformation
Bilinear Transformation
Prewarping
Factoring Polynomials
Phase Advancing
Appendix E Solutions of Exercises
Index
 
 
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