How to draw bode diagram with measured data?

Question

Tianji Li 2015-1-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/170042-how-to-draw-bode-diagram-with-measured-data

回答： Victor Tibanlombo 2018-2-27

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.

if true
  % code
end

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Arkadiy Turevskiy 2015-2-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/170042-how-to-draw-bode-diagram-with-measured-data#answer_167795

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.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Mehdi Ghasem Moghadam 2017-4-20

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

请先登录，再进行评论。

Answer 2

Victor Tibanlombo 2018-2-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/170042-how-to-draw-bode-diagram-with-measured-data#answer_307336

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