Modern Control Systems
Authored by Richard C. Dorf (University of California, Davis) &
Robert H. Bishop (Marquette University)
📖 Companion Resource to the 12th Edition
Modern Control Systems by Richard C. Dorf & Robert H. Bishop
Prentice Hall
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, T A B L E - O F - C O N T E N T S
1. Introduction to Control Systems.............................................................. 1
2. Mathematical Models of Systems........................................................... 22
3. State Variable Models ............................................................................. 85
4. Feedback Control System Characteristics ............................................ 133
5. The Performance of Feedback Control Systems ................................. 177
6. The Stability of Linear Feedback Systems .......................................... 234
7. The Root Locus Method....................................................................... 277
8. Frequency Response Methods .............................................................. 382
9. Stability in the Frequency Domain ...................................................... 445
10. The Design of Feedback Control Systems .......................................... 519
11. The Design of State Variable Feedback Systems ............................... 600
12. Robust Control Systems ..................................................................... 659
13. Digital Control Systems ..................................................................... 714
iv
, C H A P T E R 1
Introduction to Control Systems
There are, in general, no unique solutions to the following exercises and
problems. Other equally valid block diagrams may be submitted by the
student.
Exercises
E1.1 A microprocessor controlled laser system:
www.elsolucionario.org
Controller Process
Error Current i(t)
Desired Micro- Power
Laser
power - processor out
output
Measured
power
E1.2 A driver controlled cruise control system:
Controller
Foot pedal
Desired
Car and Actual
Driver
speed - Engine auto
speed
Measurement
Visual indication of speed
Speedometer
E1.3 Although the principle of conservation of momentum explains much of
the process of fly-casting, there does not exist a comprehensive scientific
explanation of how a fly-fisher uses the small backward and forward mo-
tion of the fly rod to cast an almost weightless fly lure long distances (the
1
, 2 CHAPTER 1 Introduction to Control Systems
current world-record is 236 ft). The fly lure is attached to a short invisible
leader about 15-ft long, which is in turn attached to a longer and thicker
Dacron line. The objective is cast the fly lure to a distant spot with dead-
eye accuracy so that the thicker part of the line touches the water first
and then the fly gently settles on the water just as an insect might.
Wind
Controller
Mind and Actual
of - body of the cast position
of the fly
fly fly-fisher
Measurement
of
Visual indication
of the position of
the fly
E1.4 An autofocus camera control system:
One-way trip time for the beam
Conversion factor
1 (speed of light or
sound)
Distance to subject
Emitter/