5/28/2012 9:18 AM | |
Joined: 9/8/2009 Last visit: 7/17/2023 Posts: 1410 Rating: (152) |
Yes, and how could we know that? You said that you have a transfer funcion, so where is the problem? |
10/12/2015 2:58 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4769 Rating: (123) |
New question published by ASHRAF2015 is split to a separate thread with the subject How to use FB1 , FB2 - in standard pid control- to implement four control loops. Best regards |
10/12/2015 3:06 PM | |
Posts: 4 Rating: (0) |
THANKS FOR YOUR REPLY , BUT I NEED TO KNOW HOW THE SCHEDULAR FUNCTION AND THE DB_SCHEDULAR WILL BE THANKS A LOT |
10/12/2015 3:46 PM | |
Posts: 4 Rating: (0) |
THANKS A LOT SIR |
10/13/2015 12:27 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4769 Rating: (123) |
New question published by ASHRAF2015 is split to a separate thread with the subject Question to PID controllers. Best regards |
10/21/2015 11:21 AM | |
Joined: 10/22/2008 Last visit: 7/26/2024 Posts: 369 Rating: (5) |
Hi, As I undtrstand Your question is that You want to keep the right pressure in amonia compressor. My advice is to translate SP (temperature) to SP (pressure) for Your PID controller. You can find the equestion in interent. Vapor pressure formula for ammonia:[2]
where P is pressure in kPa and T is temperature in Kelvin
(https://en.wikipedia.org/wiki/Ammonia_%28data_page%29) In PID SP(pressure caluclated) and PV(pressure from sensor). Hope helped. |
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