Find the ultimate gain and frequency for a proportional controller in – McqOptions

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1.	Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1).
A.	w = 1/14, Kc = 45/714
B.	w = 7/6, Kc = 46/3
C.	w = 1, Kc = 13
D.	w = 7/8, Kc = 45/4
Answer» C. w = 1, Kc = 13

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