Solutions Manual
6th Edition
Feedback Control of Dynamic
Systems
.
.
Gene F. Franklin
.
J. David Powell
.
Abbas Emami-Naeini
.
.
.
.
Assisted by:
H.K. Aghajan
H. Al-Rahmani
P. Coulot
P. Dankoski
S. Everett
R. Fuller
T. Iwata
V. Jones
F. Safai
L. Kobayashi
H-T. Lee
E. Thuriyasena
M. Matsuoka
Chapter 1
An Overview and Brief
History of Feedback Control
1.1
Problems and Solutions
1. Draw a component block diagram for each of the following feedback control systems. (a) The manual steering system of an automobile
(b) Drebbel’ incubator s (c) The water level controlled by a ‡ and valve oat (d) Watt’ steam engine with ‡ s y-ball governor
In each case, indicate the location of the elements listed below and give the units associated with each signal. the process the process output signal the sensor the actuator the actuator output signal
The reference signal
Notice that in a number of cases the same physical device may perform more than one of these functions.
Solution:
(a) A manual steering system for an automobile:
101
102CHAPTER 1. AN OVERVIEW AND BRIEF HISTORY OF FEEDBACK CONTROL
(b) Drebbel’ incubator: s (c) Water level regulator:
(d) Fly-ball governor:
1.1. PROBLEMS AND SOLUTIONS
103
(e) Automatic steering of a ship:
(f) A public address system:
2. Identify the physical principles and describe the operation of the thermostat in your home or o¢ ce.
Solution:
A thermostat is a device for maintaining a temperature constant at a desired value. It is equipped with a temperature sensor which detects deviation from the desired value, determines whether the temperature setting is exceeded or not, and transmits the information to a furnace or air conditioner so that the termperature in the room is brought back
104CHAPTER 1. AN OVERVIEW AND BRIEF HISTORY OF FEEDBACK CONTROL
S to ra g e chest R e f in e r
S creen s
H eadbox a n d c le a n e rs
M a