Algebraic loop Problem at Simulink

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Hi,

I am working on a problem containing 7 differential equations in which all the outputs of each equation are at the same time inputs of them. Therefore when I try solving the problem, it appears an error message "Trouble solving algebraic loop containing 'model_name' at time 2.10470..." Please how to use IC block on my model, or another solution ??

Find the model here: http://www.megaupload.com/?d=JZQYMIAS

Thanks for your answers.

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Titus Edelhofer 2011-11-3

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Hi,

the fact that the input is needed should not be a problem. I did not download the model (since I have no Simulink right here), but this problem typically arises when one uses differential blocks instead of integrators. If this is a case, take a look at model vdp as an example how to use integrators to build the differential equations.

Titus

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Victor 2011-11-3

I have used integrators block to describe the equations. This is not the problem, the problem is that simulink doesn't really know where exactly it has to start calculating( I guess) because all the equations have therms involving results from other equations, is like a big Loop.

Can you have a look at the model, and tell me something ??

Do you know if I can apply IC Block to my model ? How ?

Thanks !!!

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Algebraic loop Problem at Simulink

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