28176 Parallax Inc, 28176 Datasheet - Page 282
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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Challenge 8-1: Predict PID Outputs
Part A
Figure 8-11 on page 273 is a plot of light levels and 3 plots for the P, I and D outputs.
With a bias of 0, predict the output for each evaluation individually. Assume gains of 1
for all, and a 5 second evaluation time. The first set is done for you.
Part B
Below is data representing the systems conditions and data for PID evaluation. Calculate
the output for each evaluation. The 1st 3 lines are done for you.
Actual
500
510
490
480
470
520
500
500
1.0
1.0
0.5
0.5
2.0
1.0
0.5
1.0
∆t
Given Kp = 2 Ki = 0.01
-10
10
E
0
Table 8-1: PID Evaulation Activity
-20
∆E
10
0
P(KpE)
-20
20
0
Kd = 4
E∆t
10
-5
0
Setpoint = 500
I(KiΣE∆t)
0.05
.1
0
D(Kd∆E/∆t)
-160
40
0
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