MATLAB: Insert a function in Simulink

Question

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!

Answer 1

The Clock block gives you time t for simulation. The rest is to use multiplication, sum and Devide.