Algebraic Loop Problem

Hi

i have a S-function block that works perfectly fine when i didnt feedback it as an input for the S-function.

When i feedback my results to the s-function, it comes out a algebraic loop error or the output becomes 0. What i want is just used the calculated value from the S-function block for the next time step.

Is there any other methods to get what i want other than looping back the value?

[Tan Edwin]

i dun need the matlab to calculate any convergence solution

Answer 1

[Tan Edwin]

Sry didnt notice that there were post on this already.

http://www.mathworks.com/matlabcentral/answers/925-loop-algebraic-and-variable-signal

Problem solved by using the unit delay block.

Answer 2

[Shpat]

the brutal solution is use a very small delay