How to draw bode diagram with measured data?

i get sampling data of motor's input x(t)[current] and output y(t)[position] with length [1x90000], sample frequency 2000.

But i don't know how to get the bode digram of the transfer function in frequncy domain(Y(s)/X(s)).[the plot with magnitude in y-axis(dB), frequency in x-axis(10^n)]

And also the angle of the transfer function.

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Answer 1

[Arkadiy Turevskiy]

There are a couple of options: you can use System Identification Toolbox, see here . Another option is tfestimate from Signal Processing Toolbox.

Lastly, you can compute FFTs on your own.

[Mehdi Ghasem Moghadam]

Hi Arkadiy. Would you please give me an example for sketching Bode diagram via FFT computation. Cheers

Answer 2

[Victor Tibanlombo]

Sorry; Could you solve your question? about: How to draw bode diagram with measured data? because i have the same question and I do not know how to graph the bode diagram via FFT computation.

Cheers