How to find the equivalent transfer function(poles and zeros) having the Body diagram ?

Hello everyone,

I have an Excel file where there are the datas expressed with frequency and gain steps, therefore a body diagram.

After having plotted it on Excel, they have a 'high pass' behaviour, so I would find the equivalent poles and zeros(and transfer function) with Matlab giving it the Excel datas.

Can you help me?

Thanks in advance.

Regards.

[Juster]

Any answer?

Thanks

[Ryan]

Determining the transfer function from the bode plots of the frequency response is a theory question in my opinion and not Matlab related. This should help you get started either way: http://www.ece.utah.edu/~ee3110/bodeplot.pdf

Answer 1

[Craig]

The System Identification Toolbox has functions that estimate a transfer function from freqeuncy response data. For example the tfest command.