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Homework Statement
Problem:
We want a closed loop control loop for the given process (see bode plot), the control loop requirements are:
 Steady state error needs to be zero.
 The gain margin needs to be infinite.
 The phase margin needs to be 40 degrees.
 Which controller will be the best choice: P, PI, PID or PD and why?
 What are the controller settings needed to reach the requirements for the controller you have chosen.
Homework Equations
Standard controllers in de Laplace domain.
The Attempt at a Solution
My attempt to find a solution:
 Steady state error needs to be zero. ==> We need an integrator action
 The gain margin needs to be infinite. ==> the phase is not allowed to cross the 180°.
 The phase margin needs to be 40 degrees. ==> phase margin at 0 dB crossing.
How can I find the appropriate settings for my controller?
Thanks in advance for helping me out!
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