LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

PID control + simulated controlled system

Hello!
 
I'm working on a PID control with a simulated controlled system and i have three big problems in it and i need admonitory help.
 
So here are the problems:
 
1. If i adjust T=3seconds at all filters (PT1/lowpass attitude) for example, the control device act oddly (look the jpg attachment). Are all
    filters adjust at T=9s however, the control  going off without a hitch?!?! It is possible, that "T" is calculated for digital IIR-filters
    differently to analog-filters resp. what's with the upper limiting frequency?
 
2. The time (in seconds) in my Graph only accords if i adjust the sample frequency at 1Hz. How can i realize it by using the looping
     iteration to calculate and implement the convenient time for the graph as to that?
 
3. Corresponding to that the abscissa from the Diadem report debit marked also such as the waveform graph...but anyhow i can't
    wangle it?!
 
 
I would be pleased if anybody point me in the right direction?!
 
With best regards from Germany...
 
Stonei
 
...enclosed my VI's (LV v8.2 / Diadem 10.1) and the jpg


Message Edited by Stonei on 04-02-2008 06:49 PM
0 Kudos
Message 1 of 2
(2,498 Views)
0 Kudos
Message 2 of 2
(2,436 Views)