how to vary parameters in Simulink

Hello, I have the attached system and I would like to vary the frequency of the AC source, to make a frequency sweep. Can anyone help with that?

Thank you.

[Muhammed Fasil]

Near RUN(green) button , there is a left side directed button. Click on that and enter a time in that Pause block. So when simulation reaches that time, it pauses. At that time u manually change input frequency

[Gabriel Oliviero]

when you press pause during the simulation, the parameters of the blocks are blocked and you can't change.

Answer 1

[Sebastian Castro]

Do you mean changing frequency during simulation, or being able to run multiple simulations with different frequencies each?

• If you want to change frequency during simulation, you can change the input with a Controlled Voltage Source block and pass in a Sine wave of varying frequency into this block.
• If you want to change frequency between simulations, you can set the AC Voltage Source's frequency to a MATLAB variable and change the value of the variable between simulations. This lends itself well for scripting, too.

Also, what is your end goal? Simulink Control Design has a way to automatically perform frequency response estimation and get an experimental Bode plot.

- Sebastian

[Gabriel Oliviero]

Hello Sebastian, actually what I want is to change the block parameters during the simulation, like the spring constant of the solenoid or the number of turns, in order to do a sensitivity analysis of the system.

[Sebastian Castro]

I see... did you see this new video on sensitivity analysis in R2016a?

http://www.mathworks.com/videos/design-exploration-using-the-sensitivity-analysis-tool-118699.html

[Fred Tabash]

Greetings, Sebastian...

In fact, I did see the video and am practicing on it right now...

however, I have a problem when I want to build a physical model, such as a circuit with diodes, resistors, capacitors, and so on...

My goal is to perform sensitivity analysis and Monte Carlo simulation... but I can't find these parameters in the App sensitivity analysis. Would you mind if I asked how I could specify the parameter as a variable for the app to be able to select and analyze it?

I appreciate your help.