Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / www.islamqa.com
Actually we can make it simple:
# P:
it's a controller gain which modify the controller o/p
proportional to the error.
# I:
it's a controller gain which modify the controller o/p
proportional to the integral of the error.
# D:
it's a controller gain which modify the controller o/p
proportional to error rate of change.
We have 4 parameters in our control loop to focus on:
1 - the rise time: the period of time during which the pv
get 90% of the desired sp value
2 - max overshoot
3 - settling time: the period of time during which the pv
get the desired sp value and saturate.
4 - error/offset
we can get it clear from this pic:
http://controls.ame.nd.edu/ame437/S2003/hw1/specifications.j
pg
Now we will take a look about the effect of each controller
gain on these parameters:
# P gain:
decrease rise time
increase max.overshoot
increase settling time
decrease error (but not eliminate)
# I gain:
decrease rise time
increase max.overshoot
increase settling time
eliminate error.
# D gain:
no effect on rise time
decrease max.overshoot
decrease settling time
decrease error.
the previous is guidelines to be in background while
dealing with PID,but they are not sharp limits.
Regards,
Ahmed Sabry
Control and Instrumentation Engineer
GPC - General Petroleum Company
ahmedsabry.online@gmail.com
CELL.: 00 2 0121367310
| Is This Answer Correct ? | 7 Yes | 0 No |
Post New Answer View All Answers
can u briefly explain aboutan aryton shunt multirange DC ammeter?
How to Calibrate Vibration Probe (Axial, Redial) in field
What are different type of instrument cable
why we are not using the turbine flow meter in the steam service?
please tell no. & add. of consultancy who recruit me in power plant as instrumen engg. present i m working in power plant as ass.t instrument engg. thanku mahesh 09226562826
i have done DAE in Instrumentation and Process Control. i have applied for an apprentice training in chemical company after three day my interview will be conduct but i need more information about industrial process control and controller. my e mail is imran_dilsetu@yahoo.com please tell me interview question relative to instrumentation ?
plz tell me clearly about PID.."when v have to change I value,D value,GAIN??
how 3 out of 2 Logic/interlocks works? give brief explanation with help of diagram.
Describe the functions of the Operator Interface including the considerations related to alarming and display layout/configuration/layers.
Pl send the model question paper of mahagenco account officer post
how to work static pressure sensore how to work dpt
i want to find out iffco get test paper
What is megering????
Sir , i have completed my M.Sc In Instrumentation and presently working in Maintenance department 3 yrs Exp , is there is any possible for work in offshore ..
all questions related to instrument technician in any offshore oil and gas company.
