Richard Hayes wrote:
Dear list,
I am thinking about creating an automatic control system.
The main purpose is to maintain an established relationship between say,
temperature and pressure.
E.g. If the temperature is too high, reduce pressure
You need to specify a bit more about what accuracy of control you need and what
response time is required.
Simple on/off control (e.g. temp over x Celsius so reduce pressure by y
milliBars) could be done via some simple code on a serial line.
But if you have a need to limit overshoot and require accuracy then you might need "Proportional- Integral- Derivative (PID) control".
http://www.netrino.com/Publications/Glossary/PID.html
That is much harder and would probably require you to use a pre-written library.
There will be a number of real time data feeds.
1. Would it be better if each data feed / sensor had it own independent
'agent' / servlet to monitor its function or is a single integrated
system to monitor all the sensors?
2. What free tools exist to monitor systems?
Don't know.
Any other suggestions.
Things like LabView or LabNoteBook are setup to do this. They have a GUI programming environment and
have PID control algorithms.
Using those would be much easier. Ask them for the Linux version.
Mike
--
Michael Lake
Chemistry, Materials & Forensic Science, UTS
Ph: 9514 1725 Fx: 9514 1460
[pls ignore idiot lawyer's msg below]
--
UTS CRICOS Provider Code: 00099F
DISCLAIMER: This email message and any accompanying attachments may contain
confidential information. If you are not the intended recipient, do not
read, use, disseminate, distribute or copy this message or attachments. If
you have received this message in error, please notify the sender immediately
and delete this message. Any views expressed in this message are those of the
individual sender, except where the sender expressly, and with authority,
states them to be the views the University of Technology Sydney. Before
opening any attachments, please check them for viruses and defects.
--
SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/
Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
