I have a system compound by a BLDC motor and a linear actuator (see the figure attached) and i want to do the indentification of my system. So, using the steps showed at the figure Block Diagram for TF Estimation (attached), i got a TF but i do not know what it really represent. At figure Block Diagram for TF Estimation, where is writed motor at , i connected the output signal (Controlles Position) of my system. I would like to know if this TF estimated is only of my system (G(s) or motor+actuator). How can i verify if is it in open-loop or closed-loop? My system is in closed-loop (PID+G(s)) and this TF represents just G(s)? I need more details about that.
At the figure TF BLDC motor (attached), I simulated a step reference in the TF estimated. Analysing the response, seems that represent just the G(s). Please, tell me about that tools for identification of systems if you can.