# Arduino PID Practice Problems

A simple proportional control algorithm differs from a PID controller by NOT looking at:

a)The present

b)The past

c) The future

d) The past and the future

e) All of the above

Which one is correct?

Homework? Or are you sitting in the exam room now?

Homework,but I need the answer in 1 hour.

Plenty of time to read up about PID algorithms , you might learn something that way....

Come on guys, it's very important for me to know this answer. Just give me a little hint or help. I really need this one.

You will get an A on this. The answer should B easy. If you can C the future. Or Don't.

But I can't think of anything using E. (Sad face)

danailamarian99:
Homework,but I need the answer in 1 hour.

Looks like I'm too late.

But if not, and if the OP promises to say in his answer "The folks on the Arduino Forum told me the answer is ..." I may be persuaded to think about it.

...R

PID Control. Took 3 seconds with google, “PID present past future”.

The proportional part acts on the *** value of the error, the integral represents an average of *** errors and the derivative can be interpreted as *** errors.

JimEli:
The proportional part acts on the *** value of the error, the integral represents an average of *** errors and the derivative can be interpreted as *** errors.

Pity you're not doing the exam. I reckon you should get 40% just for that.

...R