I have a hard time understanding the differnce between the two techniques that are introduces in my textbook, a PID controller and Lead/Lag compensation.
Ultimately we add a new box to our "loop" and change the transfer function of our system(by multiplying the new box's transfer function with the old). And then tune the parameters to get the properties we want.
Are there examples of things that we can accomplish with a PID which we cant with a Lead or Lag or vise versa? To me it looks like not.
If they are really different could someone try to explain the difference between these control techniques?