Question: A unity feedback control system given by = L(s) G(s) H(s) - Se-st = s(s+3)(s + 4) Determine (a) phase margin for T = 0,

A unity feedback control system given by

= L(s) G(s) H(s) - Se-st = s(s+3)(s + 4) Determine (a)

= L(s) G(s) H(s) - Se-st = s(s+3)(s + 4) Determine (a) phase margin for T = 0, (b) limiting value of 7 for stability

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