Question: P5.19 A closed-loop control system with negative unity feedback has a loop transfer function L(s) = G(s)G(s) = 8 s(s+68+12) (a) Determine the closed-loop transfer

P5.19 A closed-loop control system with negative unity feedback has a loop transfer function

L(s) = G(s)G(s) = 8 s(s+68+12) (a) Determine the closed-loop transfer function

L(s) = G(s)G(s) = 8 s(s+68+12) (a) Determine the closed-loop transfer function T(s). (b) Determine a second-order approximation for T(s). (c) Plot the response of T(s) and the second-order ap- proximation to a unit step input and compare the results.

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