how can in make this transfer fnunction block in simulink ?

I want to complete the following loop but I don't know how to create the sCv block.

how can i make this block in simulink?

Cv is a constant value (Cv=5)

Answer 1

[Sam Chak]

Hi @sajad Tarverdian

If your LPF has a strictly proper transfer function, you can incorporate 's*Cv' into the LPF transfer function block through multiplication. See the example below:

s   = tf('s');
fc  = 10e3;
LPF = fc/(s + fc)

LPF =
 
    10000
  ---------
  s + 10000
 
Continuous-time transfer function.

Cv  = 5;
Gf  = LPF*(s*Cv)

Gf =
 
   50000 s
  ---------
  s + 10000
 
Continuous-time transfer function.

Update: Block diagram

[sajad Tarverdian]

thanks a lot

how can i create this loop in simulink?

[Sam Chak]

Hi @sajad Tarverdian,

I've revised the answer and included a sketchy block diagram. Is this solution acceptable? You can replicate it in Simulink as shown, inserting the necessary parameters and values that you are aware of. Try it out on your Simulink.

[sajad Tarverdian]

Please open the Transfer Fcn block and tell me how to enter numerator coeffisient and denomiator coefiisient to make sCv

Cv=5

[Sam Chak]

Oh @sajad Tarverdian, I wasn't aware that you're unfamiliar with specifying coefficient parameter values in the Transfer Function block (you can click here to learn at your own pace). While I didn't save the Simulink file, the explanation below should be easy to comprehend. Please update me if you can follow it.

Because the term is improper (you can study this terminology here), it needs to be multiplied into the LPF transfer function (strictly proper), as demonstrated in my Answer above.

Given that the lumped transfer function, Gf, is , you can set the Numerator coefficient parameter values as [50000 0] and the Denominator coefficient parameter values as [1 10000]. If you enlarge the Transfer Function block, the block should display the equation according to the specified values.

[sajad Tarverdian]

very good

thank you

[Sam Chak]

@sajad Tarverdian, I'm glad it works out/ If you find the solution helpful, please consider clicking 'Accept' ✔ on the answer and voting 👍 for it. Thanks a bunch!

[sajad Tarverdian]

sure