Question

6. (8 pts) Which of the root locus plots shown in Figure 1.4 is the correct plot for a unity feedback system with open-loop transfer function G(s) = 1 / (s^2(s+5)) (A) Figure (a) (B) Figure (b) (C) Figure (c) (D) None of the above 7. (8 pts) A unity feedback system has open-loop poles at s = -1 ± j2, s = -1, and s = 0, and a zero at s = -6. The angle made by the root-locus asymptotes with the real axis and the point of intersection of the asymptotes are, respectively: (A) (45°, -45°, 180°) and 1 (B) (60°, -60°, 180°) and 1

          6. (8 pts) Which of the root locus plots shown in Figure 1.4 is the correct plot for a unity feedback system with open-loop transfer function G(s) = 1 / (s^2(s+5))
(A) Figure (a)
(B) Figure (b)
(C) Figure (c)
(D) None of the above
7. (8 pts) A unity feedback system has open-loop poles at s = -1 ± j2, s = -1, and s = 0, and a zero at s = -6. The angle made by the root-locus asymptotes with the real axis and the point of intersection of the asymptotes are, respectively:
(A) (45°, -45°, 180°) and 1
(B) (60°, -60°, 180°) and 1

6. (8 pts) Which of the root locus plots shown in Figure 1.4 is the correct plot for a unity feedback system with open-loop transfer function G(s) = 1 / (s^2(s+5))
(A) Figure (a)
(B) Figure (b)
(C) Figure (c)
(D) None of the above
7. (8 pts) A unity feedback system has open-loop poles at s = -1 ± j2, s = -1, and s = 0, and a zero at s = -6. The angle made by the root-locus asymptotes with the real axis and the point of intersection of the asymptotes are, respectively:
(A) (45°, -45°, 180°) and 1
(B) (60°, -60°, 180°) and 1

Added by William S.

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