(a) Component block diagram of a room temperature control ...
12
Desired temperature Thermostat Gas valve Furnace Heat loss House Room temperature Q in Q out 70 60 50 40 30 20 10 0 Temperature (degrees F) 0 2 4 6 Time (hours) 8 10 12 14 16 Room temperature Outside temperature Furnace off Furnace on (a) (b) Figure 1.1 (a) Component block diagram of a room temperature control system (b) Plot of room temperature and furnace action ©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-Naeini Feedback Control of Dynamic Systems, 4e
Transcript of (a) Component block diagram of a room temperature control ...
Desiredtemperature
ThermostatGas
valveFurnace
Heat loss
House
RoomtemperatureQin
Qout
�
��
70
60
50
40
30
20
10
0
Tem
pera
ture
(de
gree
s F)
0 2 4 6
Time (hours)
8 10 12 14 16
Room temperature
Outside temperature
Furnace off Furnace on
(a)
(b)
Figure 1.1 (a) Component block diagram of a room temperature control system (b) Plot of roomtemperature and furnace action
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Reference OutputControlsignal
Actuator
Disturbance
Sensor
Sensornoise
Inputfilter
ProcessController�
�
�
Plant
Figure 1.2 Component block diagram of an elementary feedback control
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Desiredspeed
ControllerControlvariable
Throttle
Actuator
Engine
Roadgrade
Autobody
Actualspeed
Speedometer
Sensor
Measuredspeed
Sensornoise
??
Process
Figure 1.3 Component block diagram of automobile cruise control
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
� 10
0.5
�
w (% grade)
yu
Control(degrees)
Output speed(mph)
�
Figure 1.4 Block diagram of the cruise control plant
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Plant
Controller
� 10
0.5
�
�
w
yru
1/10
Figure 1.5 Open-loop cruise control
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Controller
� 10
0.5
�
�
w
yclru
� 10
�
�
Plant
Figure 1.6 Closed-loop cruise control
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Supply
Float
Figure 1.7 Early historical control of liquid level and flow
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Water
Fluegases
Metal plate Fire Alcohol
Mercury
Float
Riser
Damper
Eggs
Figure 1.8 Drebbel’s incubator for hatching chicken eggs. (Adapted from Mayr, 1970)
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Figure 1.9 A steam engine from the shop of James Watt.(British Crown Copyright, Science Museum, London)
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Figure 1.10 Watt’s steam engine (1789–1800) with fly-ball governor.(British Crown Copyright, Science Museum, London)
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Pivot
To engineinlet
Butterfly valve
Steam
Sleeve
Balls
Rotation
Pulleyfrom engine
Figure 1.11 Operating parts of a fly-ball governor
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
Thickstock
Consistencymeter
ControllerWhitewater
CV
RefinerMachinechest
Storagechest
Wire
Moisturemeter
Screensand cleaners
Headbox Dryingsection
Presses Reel
Figure 1.12 A papermaking machine (From Åström, 1970, p. 192. Reprinted with permission)
©2002 Prentice Hall, Inc. Gene F. Franklin, J. David Powell, Abbas Emami-NaeiniFeedback Control of Dynamic Systems, 4e
