Problems

12.1The characteristic equations of linear control system are given below. Construct the root loci for k ≥ 0

  1. s3 + 3s2 + (k + 2)s + 5k = 0

  2. s4 + 6s3 + 9s2 + k(s2 + 4s + 5) = 0

12.2The forward path transfer functions of a unity feedback control system are given below. Construct the root loci for k ≥ 0.
(a)

(b)

(c)

12.3Draw the root loci for the unity feedback open-loop systems whose transfer functions are given below:
(a)

(b)

(c)

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