How to solve Differential Equation in Simulink Model

2011 5 15
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Hi, How to write this model into simulink :
{ dv/dt = -4.5 - 0.42v - 0.334v^2 }
I was unable how to write when model include 0.334v^2.
Someone pls help me.
tq...

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Arnaud Miege
Arnaud Miege 2011-5-16

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Use the Math Function block, and select square as the function. Once you have calculated dv/dt, you can then use the integrator block to calculate v and feed it back to the RHS of the equation.
HTH,
Arnaud

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