Question

An ideal PID controller has the transfer function [1 + 1/0.55 + 0.25 ]. The frequency at which the magnitude ratio of the controller is 1, is

a.

A

b.

B

c.

C

d.

D

Answer: (d).D

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Q. An ideal PID controller has the transfer function [1 + 1/0.55 + 0.25 ]. The frequency at which the magnitude ratio of the controller is 1, is

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