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systems can be covered in a textbook of this length. Electrical, mechanical (both translational
and rotational), and electromechanical systems are used as examples of physical systems
that are modeled, analyzed, and designed. Linearization of a nonlinear system—one technique
used by the engineer to simplify a system in order to represent it mathematically—is also
introduced.
Chapter 4 provides an introduction to system analysis, that is, finding and describingthe
outputresponse of a system. It may seem more logical to reverse the order of Chapters 4 and 5,
to present the material in Chapter 4 along with other chapters covering analysis. However,
many years of teaching control systems have taught me that the sooner students see an
application of the study of system representation, the higher their motivation levels remain.
Chapters 6, 7, 8, and 9 return to control syst ems analysis and design with the study of
stability (Chapter 6), steady-state errors (Chapter 7), and transient response of higher -order
systems using root locus techniques (Chapter 8). Chapter 9 covers design of compensators
and controllers using the root locus.
Chapters 10 and 11 focus on sinusoidal frequency analysis and design. Chapter 10,
like Chapter 8, covers basic concepts for stability, transient response, and steady-state-error
analysis. However, Nyquist and Bode methods are used in place of root locus. Chapter 11,
like Chapter 9, covers the design of compensators, but from the point of view of sinusoidal
frequency techniques rather than root locus.
An introduction to state-space design and digital control systems analysis and design
completes the text in Chapters 12 and 13, respectively. Although these chapters can be used as
an introduction for studentswho will be continuing their studyof controlsystems engineering,
they are useful by themselves and as a supplement to the discussion of analysis and design in
the previous chapters. The subject matter cannot be given a comprehensive treatment in two
chapters, but the emphasis is clearly outlined and logically linked to the rest of the book.
Acknowledgments
The author would like to acknow ledge the contributions of faculty and students, both at
California State Polytechnic University, Pomona, and across the country, whose sugges-
tions through all editions have made a positive impact on this new edition.
I am deeply indebted to my colleagues, Drs. Elhami T. Ibrahim and Salomon Oldak
at California State Polytechnic University, Pomona for authoring the creative new
problems you will fi nd at the end of every chapter. The new progressive problem, solar
energy parabolic trough collector, that is at the end of every chapter is the creation of
Dr Oldak. In additio n, I am g rateful to Dr. Oldak for creating the National Instruments
myDAQ experiments, which you will find in the Hardware Interface Laboratory section
of many chapters. Finally, I want to thank Dr. Norali Pernalete, also of Ca lifornia State
Polytechnic University, Pomona, for her contribution of the LabVIEW experiments and
problems continuing in this edition.
I would like to express my appreciation to those who participated in reviews of this
seventh edition. They are: James R. McCuske r, Wentworth Institute of Techn ology, and Ji-chul
Ryu, Northern Illinois University.
The author would like to thank John Wiley & Sons, Inc. and its staff for once again
providing professional support for this project through all phases of its develo pment.
Specifically, the following are due recognition for their contributions: Don Fowley, Vice
President and Publisher, who gave full corporate support to the project; Dan Sayre,
Executive Editor, with whom I worked closely and who provided guidance and leadership
throughout the development of the seventh edition; Francesca Baratta and Jessica Knecht,
Editorial Assistants who were always there to answer my questions and respond to my
concerns in a profes sional manner; and Anna Melhorn, Senior Production Editor, who
turned the seventh edition manuscript into the final product you are holding in your
hands. Other contributors who worked hard behind the scenes are: Wendy Lai, Designer;
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