What do you observe with a PI Controller if the system is already an Integrator system ?

Question

Answer

The PI controller is always necessary to eliminate the error of the control system even if the system is integrator.

Answer

The PI controller can not eliminate the error of the control system even if the system is integrator.

Answer

With 2 Integrator in the closed loop (Integrator System and PI Controller), the control system can easily oscillate and becomes instable.

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