How to get frequency resolution from bode plot or transfer function?

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Zhe Liu 2016-7-18

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https://ww2.mathworks.cn/matlabcentral/answers/296235-how-to-get-frequency-resolution-from-bode-plot-or-transfer-function

评论： Star Strider 2016-7-19

采纳的回答： Star Strider

I want to know the frequency resolution from bode plot I estimate by using system identification toolbox. But how?

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Answer 1

Star Strider 2016-7-19

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/296235-how-to-get-frequency-resolution-from-bode-plot-or-transfer-function#answer_229037

在 MATLAB Online 中打开

You have to ask it to return them as outputs:

[mag,phase,wout] = bode(sys)

In this example, ‘wout’ are, from the documentation:

Response frequencies, returned as a row vector of frequency points. Frequency values are in radians per TimeUnit, where TimeUnit is the value of the TimeUnit property of sys.

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Zhe Liu 2016-7-19

should frequency resolution be a value not a vector? Like fourier where resolution is just 1/window but in bode I really don't know....may be calculated by time step and transfer function?