need help to obtain TF of this circuit and design a controller( PID or root locus or digital ).
thank you

 

Before you can possibly find the transfer function, you need to know what is being transferred. Which signal is your input and which signal is your output?

 

Before you can possibly find the transfer function, you need to know what is being transferred. Which signal is your input and which signal is your output?

I have searched and find that the transfer function will be I2(s) /E(s)

 

I have searched and find that the transfer function will be I2(s) /E(s)

So now it is just a circuit analysis problem. What is I2(s)? Divide that by E(s). There's your transfer function.

Show your best attempt if you are still having problems.