Frequency Response (step response method)

[ds_1]

  Hi Guys,   I wish to use this method (this appears as an example vi) for determining the freq response of my system, with my input signal (step response : square wave) I will first need to "derive" the impulse response. Can anyone explain what "derive" means in this occasion. In the example it uses a library call but I need more detail.                                                                                                             Thanks ,ds1

[Darin.K]

Haven't seen the example, but I'll assume they refer to the fact that you can find the frequency response from the FFT of the impulse response which in turn is found by taking the derivative of the step response.  The impulse is simply the derivative of the step.

[Barp · Accepted solution]

If you are trying to obtain a frequency response of a system, I strongly recommend to look into the following toolkit:

https://www.ni.com/en/shop/labview/select-edition.html 

Here is the manual:

https://www.ni.com/docs/en-US/bundle/372458d/page/download.html

Here are some tutorials:

https://www.ni.com/docs/en-US/bundle/labview-control-design-and-simulation-module/page/lvsysidconcep...

https://forums.ni.com/t5/LabVIEW/Where-is-the-System-Identification-Toolkit/td-p/4185414

Hope this helps