Is Matlab able to formulate a second order transfer function from just a dataset of 2 inputs and their 2 outputs or I still need to conduct a step response on my MIMO model to calculate the TF parameters?
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\$\begingroup\$ Please detail your question. (add a schematic of the system, explain briefly the context, name the variables and functions) \$\endgroup\$– MaximGiCommented Mar 16, 2016 at 8:41
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\$\begingroup\$ It was for theoretical knowledge @MaximGi \$\endgroup\$– Leb_BrothCommented Mar 16, 2016 at 8:49
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There is a identification toolbox in Matlab that can give you TF based on input and output data. System identification toolbox.
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\$\begingroup\$ I know this tool and i used it sometimes but how i can be sure it's doing a good fit for the TF model? \$\endgroup\$ Commented Mar 16, 2016 at 10:45
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1\$\begingroup\$ Toolbox provides the possibility to use half of data set for identification and second half for verification, then you can see a percentage of matching ( choose the highest one). Different methods of identification will give you different results, but it is hard to be 100% sure. When you have 90%+, you have a great identification. \$\endgroup\$– Haris778Commented Mar 16, 2016 at 10:54