v = sine wave, how to realize v^2 in simulink ?

Hi,

I'm relatively new to the Simulink world.

I want to simulate a force (output) which changes its value according to following equation.

Fx = G * V^2;

where G is a simple gain block.

and V is the AC voltage.

the block diagram looks some thing like this

sine wave -----> ?????? --------> Gain block ---------> Force

I don't understand how can i realize Voltage sqaure block ??????

regards,

Harry

Answer 1

[Mischa Kim]

Harry, you could use a multiply block where both inputs are connected to the voltage signal.

Alternatively you can use a user-defined functions block, which looks like this:

To be found in: Simulink library browser > Simulink > User-Defined Functions

[Harry_108]

thanks Mischa,

previously I have used a math square function but i was not sure, if it's correct.

[Mischa Kim]

It is. Most likely it is the same block as the one I suggested. Double-click the User-Defined Functions block enter u^2 in the text box and you'll get the block you are showing in your model.