How to implenet a timed loop in a Matlab function block

0
votes

I'm very new to Matlab Simulink and I'm trying to implement a loop in the Matlab Function Block that goes on non-stop during the whole simulation. Input:

"t" from a simple clock to make it go on until the simulation lasts.

"v" and "i" what gives a specific "p*" value, by changing the ouptut "D" a little bit I want to check if this "p*" value gets bigger or smaller (in the whole model "v" and "i" are influenced by "D")

function D = fcn(v,i,t)
%#codegen
p1 = v*i;
D = 0.5;
D = D + 0.05;

while t > 0

p2 = v*i;

if p1 > p2 
  D = D - 0.05;

else
  D = D + 0.05;

end;

p1 = p2;

end;

The Function Block says it is correct, but as I start to run it, it freezes. The next step I wanted to do (but never got there) is to put a little timer in it, to execute this loop lets say every 0.01 sec or something. Is that compliable with a Matlab Function Block or is there any way achieving this?

1
matlabfunctionloopsblocksimulink
There no break, no T incrementation ? – Vuwox
have you considered the If-action subsystem block and the While iterator subsystem blocks? They are very convenient to use. – Robert Seifert
You're freezing because you have an infinite loop. At the first simulation time step when t > 0, when this block is called, it will never exit the while loop. – Phil Goddard

1 Answers

0
votes

You probably want do do if t > 0 instead of while t > 0. Simulink already has the timer loop and it will call your function fcn at each time step t. You do not want to start your own loop inside that.