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jyothi menon
Member

Join Date: Jul 2009
Posts: 5

PID Controls

07/24/2009 12:13 PM

friends i'vent studied instrumentation

but unfortunately m in this field

i want to know about pid (proportional integral derivative)

pls help me.......
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Anonymous Poster
#1

Re: pid

07/24/2009 12:29 PM

Start here:

http://en.wikipedia.org/wiki/PID_controller

Come back w/ specific questions.
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omar
Active Contributor
Egypt - Member - New Member

Join Date: Dec 2006
Posts: 18
#2

Re: PID Controls

07/25/2009 7:31 AM

Hello Dear,

I can't see such a reason to make you feel unhappy to be if this field :)

please check this link, you may find this tutorial useful for you isA

http://www.spiraxsarco.com/resources/steam-engineering-tutorials/basic-control-theory/basic-control-theory.asp

it helped me alot and if u find it not enough please let me know...

regards,,,
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ranjha
Active Contributor

Join Date: Jul 2009
Posts: 10
#3

Re: PID Controls

07/26/2009 12:31 AM

hi dear.

its mod of controller/

onoff controller. its mean when process variable increase or decrease from set point the control valve will fully open or full close

p controller. its mean the output of controller will increase/decrease propostionally with respect to process variable.

R controller. its mean this remove the off set.between sp and pv error.

D controller,it control the impedence,and often use for temperature loop

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