How can I output the bode plot of a closed control circuit in simulink?

Currently, we are learning about control systems in school. For example, we have a plant given and are supposed to find a controller.

I want to check my calculations by using a simulation tool.

Because the control circuit is closed, I can not simulate it using my easier tool from school.

Is it maybe possible to output the bode plot of a closed control circuit in simulink? Otherwise, my idea would be to take the FFT of input and output signals and divide them by each other, but as far as I know it would be more complicated, you would have to do some kind of sweep.

This would be an example of a possible closed control circuit which I would like to find the bode plot of:

Thanks for any answers or ideas on how to output the bode plot of a closed control circuit in simulink!

Answer 1

[Sam Chak]

Hi @3a4

In Calculus, we learned Laplace Transform as a strategy for resolving linear differential equation.

Applying Laplace Transform to the closed loop yields

You can find examples here:

https://www.mathworks.com/help/slcontrol/ug/visualize-bode-response-of-simulink-model-during-simulation.html

https://www.mathworks.com/help/slcontrol/gs/bode-response-of-simulink-model.html