Question: A closed-loop feedback system is shown in Figure CP9.10. (a) Obtain the Nyquist plot and determine the phase margin. Assume that the time delay T

A closed-loop feedback system is shown in Figure CP9.10.
(a) Obtain the Nyquist plot and determine the phase margin. Assume that the time delay T = 0 s.
(b) Compute the phase margin when T = 0.05 s.
(c) Determine the minimum time delay that destabilizes the closed-loop system.

Time Delay Y(s) 10

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