How to find Transfer Function using Bode plot data points..?

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Varun Chitransh
Varun Chitransh il 4 Giu 2016
Risposto: Star Strider il 4 Giu 2016
Hi, I have simulated a dc-dc converter in PSIM and found its bode plot using PSIM AC Sweep.I have saved bode plot data points (Frequency, Amplitude and Phase values)in a .txt file. Now I want to use MATLAB SYSTEM IDENTIFICATION TOOLBOX to get 's' domain transfer function expression of my dc-dc converter by using the frequency response (Bode Plot) data points? The data points .txt file is attached, please help me, how to proceed?

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Star Strider
Star Strider il 4 Giu 2016
That does not appear to be possible. The functions that would do that in the System Identification Toolbox, iddata and tfest, require time-domain inputs. I have never attempted to do system identification on Bode plot data.

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