How to iterate in simulink?
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Hi,
I have the following problem, I want to iterate two variables in Simulink. In normal code it would look like this:
X(i+1)=X(i)+4*(X(i)-Y(i));
Y(i+1)=Y(i)+2*(X(i)-Y(i));
I used For Iterate Block but it doesn't work. I'm getting an error:
"Trouble solving algebraic loop containing 'untitled/For Iterator Subsystem1' at time 0. Stopping simulation. There may be a singularity in the solution. If the model is correct, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)."
Here's what i have done in Simulink
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Accepted Answer
Azzi Abdelmalek
on 10 Nov 2013
Edited: Azzi Abdelmalek
on 10 Nov 2013
% x(i+1)=x(i)+4*(x(i)-y(i));
% can be written as
% x(i+1)-5x(i)=-4y(i)
% z X(z)-5X(z)=-4Y(z)
% H(z)=-4/(z-5)
To get the result you can use a discrete transfer function with
numerator=-4
denominator=[1 -5]
% input signal=y
% output signal x
3 Comments
Azzi Abdelmalek
on 11 Nov 2013
Edited: Azzi Abdelmalek
on 11 Nov 2013
set initial values of your unit delay block to 400 and 100
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