One to one mapping between bode plot and transfer function

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Rupesh 2013-2-8

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https://ww2.mathworks.cn/matlabcentral/answers/62694-one-to-one-mapping-between-bode-plot-and-transfer-function

编辑： Arkadiy Turevskiy 2013-9-27

Is it possible that Bode plot can have multiple transfer functions in S domain or there is always one to one mapping between perticular bode plot and transfer function... Actually I have to design filter and I have its bode plot. I have derived corresponding transfer function .But it is of order 5 and I want to have transfer function with lower order. So is it possible to have lower order filter with same bode plot response

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Answer 1

Arkadiy Turevskiy 2013-9-27

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https://ww2.mathworks.cn/matlabcentral/answers/62694-one-to-one-mapping-between-bode-plot-and-transfer-function#answer_98016

编辑：Arkadiy Turevskiy 2013-9-27

Leaving aside the theoretical part of the question, you can use command tfest from System Identification Toolbox to identify a transfer function of specified order from frequency domain data.