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Control SystemsRoot Locus

An open-loop system has poles at 0, -2 and -4 and no finite zeros. The root-locus asymptote centroid is?

  • A-1
  • B-2
  • C-3
  • D-6
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Correct Answer: B. -2
Explanation: σa=[(0-2-4)-0]/3=-6/3=-2.
Reference: Standard control systems: root locus
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