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Insert a function in Simulink

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Hi Community!!
I am modeling a differential equation in simulink, the set of block it is correctly, only need a help to consider a coefficient.
In my set of equation, there is a constant that depend o time, I did a curve fitting in MATLAB resulting the better adjust was a rational function (coefficient in function time),
Such as (C(t) = a/(b*t+c)),
I would like to ask, kindly, a way to insert this function to modify gain in my simulation.
Thank you very much for opportunity,
Hugs!

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Accepted Answer

Fangjun Jiang
Fangjun Jiang on 6 Jul 2020
The Clock block gives you time t for simulation. The rest is to use multiplication, sum and Devide.

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Guilherme  Lopes de Campos
Thank you very much Fangjun,
I am very grateful!

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