Plotting a bode diagram without transfer function, using only magnitude and phase and frequency

3 visualizaciones (últimos 30 días)
I have 15x specified frequencies and for each frequency I have the magnitude in dB and the phase. I don't have the transfer function but I am curious if its possible to plot a bode diagram using those data.
Phase is probably not completely correct because I calculated it using seconds not ms.
w = [0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 100 200 500]
Mag = [11.1 12.4 11.2 10.3 9.7 8.7 7.1 4.8 2.5 1.6 0.7 0.17 0.08 0.02 0.003]
Mag(dB) = [20.9 21.9 21.1 20.2 19.8 18.8 16.9 13.7 7.9 4.4 -2.9 -15.4 -22.6 -34.3 -49.4]
Phase = [10.5 5.9 5.0 1.5 10.2 40.8 47.6 81.5 108 165.6 230.4 324 543.6 925.9 2008.8]
  1 comentario
Mathieu NOE
Mathieu NOE el 9 de Mzo. de 2021
hello
by definition, plotting a Bode diagram requires somehow to have frequency / magnitude and phase
As you have those data, you can surely plot them. You can also use it for feedback control - as soon as it involves only plotting the open loop and closed loop tf

Iniciar sesión para comentar.

Respuestas (1)

Paul
Paul el 9 de Mzo. de 2021
You can use the data you have to make an frd model:
doc frd
Once you have the frd model you can make the bode plot using the bode() command as for any other dynamic system model.

Categorías

Más información sobre Time and Frequency Domain Analysis en Help Center y File Exchange.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by