Need help answering a question
Need help answering a question
(OP)
Hi Guys,
I've been given some revision material for a control exam, but the one of the answers to the question is incomplete. Would someone help me answer it so i can start remembering it.
Q. For a general Direct Digital Control (DDC) system, discuss the practical hardware and software aspects that influence the selection of sampling increment, T.
This is the incomplete answer that was given:
A. Discussion should include computing speed, its relationship to sampling rate and characteristics of process quantity changes with time.
I must admit, I'm rubbish at control theory.. but can rely on my maths skills for the other questions. Could someone help answer this for me?
I've been given some revision material for a control exam, but the one of the answers to the question is incomplete. Would someone help me answer it so i can start remembering it.
Q. For a general Direct Digital Control (DDC) system, discuss the practical hardware and software aspects that influence the selection of sampling increment, T.
This is the incomplete answer that was given:
A. Discussion should include computing speed, its relationship to sampling rate and characteristics of process quantity changes with time.
I must admit, I'm rubbish at control theory.. but can rely on my maths skills for the other questions. Could someone help answer this for me?
RE: Need help answering a question
Keith Cress
kcress - http://www.flaminsystems.com
RE: Need help answering a question
And, the microcontrollers clock speed will put a cap on the sampling rate anyway.
Do you think this is close?
RE: Need help answering a question
If you assume a controller to start with, you might wind up with something that's completely useless. A control algorithm that's too laggy might was well not be there at all, since the lag will result in loop instability.
TTFN (ta ta for now)
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