PID Loop

Technical Programming
1

Could anyone provide us with an 8-inch PID loop?

I always here about how awesome PID loops are and was hoping someone could help us obtain one :slight_smile:

(Don’t get mad, just joking around :D)

2

I think an 8 inch PID loop will be more than the $400 limit per part.

3

Don’t forget about the perimeter rule.

4

What is this, I don’t even

5

I don’t think they have PID loop in that size. Try using a PI loop, I heard it’s a lot cheaper when they remove the derivative.

6

Metric is easier

7

Maybe try an 8 dB wide PID loop.

8

I can loan you a 20 centimeter PD loop, if that’s any good.

9

The one I attached is a bit wide, but maybe you can tweak the DPI.

Greg McKaskle

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10

I wish I could even understand how a PID loop works! Someone tried explaining it to me but I still don’t understand…

Also, is it just something for LabView, or does it work in other languages as well (in particular, Arduino Sketch)?

11

It’s possible to implement a PID loop in any language. As for understanding how it works, I suggest PID Without a PhD.

12

PID is not a LabVIEW thing. It is a robust control algorithm that uses several mathematical terms based on proportional response, longer-term error accumulation, and how the current error compares to previous values.

LV does have an example called General PID Simulator that may be helpful to experiment with. It has a parameterized plant that allows you to model real-world elements and practice tuning them. But the model portion is pretty academic and not that approachable. Still, it allows you to experiment with typical tuning issues and identify the symptoms in the chart.

Greg McKaskle

13

Search is your friend.

http://www.chiefdelphi.com/forums/showthread.php?t=110268&highlight=Pid

Also, it is used in other languages. My team uses JAVA, and we used PID a lot this year. As for Arduino Sketch, I think you should be able to, because it is just a bunch of math, but I do not know what google sketch is nor am I a programmer, so you might want to take my word with a grain of salt. :rolleyes:

14

+1 for PID Without a PhD. Also, this article gives a good explanation of a PID controller with a practical example: an NXT based line-following robot. It’s targeted towards FLL aged kids, but still some good info.

15

Maybe they’ll include them in he KOP next year. Having to make our own PIDs was very stressful this year. :cool:

16

At worlds someone was asking for one on the PA.

-Hugh