Question: E9.8 Consider a unity feedback with the loop transfer function K L(s) = Ge(s)G(s) = s(s+2)(s+6) (a) For K=27, show that the gain margin is
E9.8 Consider a unity feedback with the loop transfer function

K L(s) = Ge(s)G(s) = s(s+2)(s+6) (a) For K=27, show that the gain margin is G.M. = 11 dB. (b) To achieve a gain margin G.M. = 28 dB, deter- mine the value of the gain K.
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