Question: A unity feedback system has a loop transfer function of L ( s ) = G c ( s ) G ( s ) =

A unity feedback system has a loop transfer function of
L(s)=Gc(s)G(s)=K(s-1)(s+3)
(a) Determine the range of K for which the system is stable using the Nyquist plot.
(b) Obtain the gain margin as a function of K, and then find the range of K for system stability.
A unity feedback system has a loop transfer

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