[해법] 제어공학 6판(Feedback control of dynamic system 6th edition, Gene F. Franklin, J. David Powell, Abb > field8

[해법] 제어공학 6판(Feedback control of dynamic system 6th edition, Gene F. F…

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T h i c k

Chapter 1
a reading of the consistency. At the “dry end”of the machine, there is a
A thermostat is a device for maintaining a temperature constant at a
M a c h i n e
example, a thermistor, a resistor whose resistance changes with tempera-
to the desired setting. Examples: Tubes …lled with liquid mercury
(f) A public address system:
of bimetallic strips simply cause electrical contacts to open or close di-
s t o c k

m e t e r
systems.
104CHAPTER 1. AN OVERVIEW AND BRIEF HISTORY OF FEEDBACK CONTROL
Solution:
(a) A manual steering system for an automobile:
H e a d b o x D r y i n g
the actuator output signal
by the consistency of the thick stock that ‡ows from the headbox onto the
stat in your home or o¢ ce.
are attached to a bimetallic strip which tilt the tube and cause the mer-
Solution:
(c) The water level controlled by a ‡oat and valve
다.

(a) control of consistency

deviation from the desired value, determines whether the temperature
순서

desired value. It is equipped with a temperature sensor which detects
reprinted with permission.
[해법] 제어공학 6판(Feedback control of dynamic system 6th edition, Gene F. Franklin, J. David Powell, Abb
1장부터 10장까지로 구성되어 있습니다..^^)

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the sensor

W h i t e
3. A machine for making paper is diagrammed in Fig. 1.12. There are two
s e c t i o n
1.1 Problems and Solutions
W i r e
P r e s s e s R e e l
S c r e e n s
rectly. In most cases today, temperature is sensed electronically using,for
설명
c h e s t
from under the wire as controlled by a control valve (CV). A meter supplies
In each case, indicate the location of the elements listed below and
(e) Automatic steering of a ship:

w a t e r

An Overview and Brief
1. Draw a component block diagram for each of the following feedback control
or air conditioner so that the termperature in the room is brought back
cury to slide over electrical contacts. A bimetallic strip consists of two
moisture sensor. Draw a signal graph and identify the seven components

(d) Watt’s steam engine with ‡y-ball governor
give the units associated with each signal.

C o n s i s t e n c y
Solution:
(c) Water level regulator:
ture. Modern computer-based thermostats are programmable, sense the
main parameters under feedback control: the density of …bers as controlled
(a) Control of paper machine consistency:

the actuator
(b) Drebbel’s incubator:

C o n t r o l l e r
a n d c l e a n e r s
(a) The manual steering system of an automobile
strips of metal bonded together, each of a di¤erent expansion coe¢ cient
History of Feedback Control
R e f i n e r
setting is exceeded or not, and transmits the information to a furnace
S t o r a g e
[해법] 제어공학 6판(Feedback control of dynamic system 6th edition, Gene F. Franklin, J. David Powell, Abbas Emami-Naeini) 해법 입니다. The reference signal

2. Identify the physical principles and describe the operation of the thermo-

(d) Fly-ball governor:
101
레포트 > 공학,기술계열

1.1. PROBLEMS AND SOLUTIONS 103
c h e s t
current from the thermistor and convert that to a digital signal.
1장의 연습문제 풀이를 발췌했습니다. 양해바랍니다.
[솔루션] 제어공학 6판(Feedback control of dynamic system 6th edition, Gene F. Franklin, J. David Powell, Abbas Emami-Naeini) 솔루션 입니다. 1장부터 10장까지로 구성되어 있습니다.

form more than one of these functions.

Notice that in a number of cases the same physical device may per-
(b) control of moisture
so that temperature changes bend the metal. In some cases, the bending
m e t e r
M o i s t u r e
Figure 1.1: A paper making machine From Karl Astrom, (1970, page 192)
the process output signal
dryers. Stock from the machine chest is diluted by white water returning
the process
102CHAPTER 1. AN OVERVIEW AND BRIEF HISTORY OF FEEDBACK CONTROL
listed in Problem 1 for
Control, 공학, 제어, 자동, 솔루션

(b) Drebbel’s incubator
C V
wire, and the moisture content of the …nal product that comes out of the
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