ALL 10 CHAPTERS COVERED
SOLUTION MANUAL
,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’s incubator
(c) The water level controlled by a ‡oat and valve
(d) Watt’s steam engine with ‡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 per-
form 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’s incubator:
(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 thermo-
stat 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
SOLUTION MANUAL
,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’s incubator
(c) The water level controlled by a ‡oat and valve
(d) Watt’s steam engine with ‡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 per-
form 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’s incubator:
(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 thermo-
stat 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
