Identifying the Mimo system using two inputs and two outputs

How to identify the system by using input and output signals (each input affects each output) so that finally a two-by-two matrix is ​​obtained, each of which is a transformation function.

Answer 1

[Paul]

Try ssest to identify the model as a state-space system. You can then convert that to transfer function if absolutely necessary. Usually, if not always, state-space is preferred over transfer function.

Answer 2

[shahin]

What method should I use?

Attached,i have two input and two output

[Paul]

Not sure why this is posted as an Answer. It should either be a comment on the original question or perhaps a comment on another answer. As previously suggested, try using ssest. If all you have are graphs of the data, then you'll have to figure out a way to digitize those graphs into numerical data that can be processed. If you do this and are still stuck, you're more likely to get help if you post a file with the numerical data and the code that you tried.

[shahin]

This is a comment on the original question of smell and the diagrams sent in the pdf file by which it performs the identification and I sent it. Look how it is. I want to know what command code or method to do and what command and code to identify in the state space. And whether the signals have a problem!?