Week #12: (4/10-14) Ch. 8 - PID Calculations for the BS2.

Post Reply
rjagodowski
Posts: 1725
Joined: Fri Sep 04, 2015 6:59 pm

Week #12: (4/10-14) Ch. 8 - PID Calculations for the BS2.

Post by rjagodowski »

This week we're going leave the regular Control Systems text in order to jump ahead a bit to Chapter 8 in the Parallax Process Control Text discussing PID Control. Specifically, we're going to emphasize the processes through which a microcontroller can perform Proportional, Integral and Differential calculations. I've attached a pdf of Chapter 8 here for your convenience:
Process-Control-Text-Chapter 8_v1.0.pdf
(2.34 MiB) Downloaded 51 times
Figure 8-1 on page 249 shows a block diagram of a PID Control System and Figure 8-4 on page 252 shows a typical analog circuit showing the PID control elements (op-amps, R's & C's mostly).

Our focus will be on Table 8-1 on page 272. It's attached here and printed copies will be distributed in class on 4/12.
PID Controller Handout Worksheet v16.1.pdf
(156.53 KiB) Downloaded 43 times

This table is based upon the Classical PID Formula presented on page 248 of the Process Control Text:
Ch. 6 & 7 Incubator Schematic & Layout.pdf
(720.8 KiB) Downloaded 38 times

Our task in class will be to complete this chart and hopefully understand the calculations the BS2 will use to perform the PID calculations required in Chapter 8 experiments.

A pdf containing the above formula and Table is attached below and a hardcopy will be distributed in class on 4/12.
Table 8-1_p272.jpg
Table 8-1_p272.jpg (65.06 KiB) Viewed 352 times
In addition, for reference, here is the schematic for the Incubator Circuit:
Classical PID Formula.jpg
Classical PID Formula.jpg (147.74 KiB) Viewed 352 times
Derivative Control Mode Analogy from Wisc-Online.
Post Reply

Return to “EET-250 Lecture”