State Space model using ident

I did an experiment on an induction motor. I applied the voltage from zero to 400 in steps of 5. I got speed for each voltage. So input is voltage and output is speed. I wish to get a state space model of the motor using system identification tool ident. I loaded my input and output using time domain data but could not get the model. What mistake I am doing? Please help. Thanks in advance.

Answer 1

[Arkadiy Turevskiy]

What did you try to do already? Can you post your code, or snapshots of what you did in the app? If you want to get help you need to be more specific about what exactly did not work.