28176 Parallax Inc, 28176 Datasheet - Page 316
28176
Manufacturer Part Number
28176
Description
KIT PARTS PROCESS CONTROL W/TEXT
Manufacturer
Parallax Inc
Datasheet
1.122-28176.pdf
(330 pages)
Specifications of 28176
Accessory Type
Process Control
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
BASIC Stamp® 2 and Board of Education
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
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Part B:
Below is data representing the systems conditions and data for PID evaluations.
Calculate the output for each evaluation. Kp = 2 Ki = 0.01 Kd = 4 Setpoint = 500
Challenge 8-3 Solution
Actual
500
510
490
480
470
520
500
500
2. Proportional Gain = 1/200% = 1/2 = 0.5
3. 111 °F = 37.5%
106 °F = 100%
115 °F = 0%
1.0
1.0
0.5
0.5
2.0
1.0
0.5
1.0
∆t
Given Kp = 2 Ki = 0.01
-10
-20
-30
10
20
Table 8-2: PID Evaulation Activity Solutions
E
0
0
0
-20
-10
-20
-20
∆E
10
50
0
0
P(KpE)
-20
-40
-60
20
40
0
0
0
Kd = 4
E∆t
-10
-60
10
20
-5
0
0
0
Setpoint = 500
I(KiΣE∆t)
-0.05
-0.65
-0.45
-0.45
-0.45
0.05
Figure 8-20
1. 200% proportional
band curve for a
system with a
setpoint of 110 °F
and a band of +/- 2 °F
.1
0
D(Kd∆E/∆t)
-160
-160
200
-80
-40
40
0
0
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