A second-order system with 0<ζ<1 is classified as?

  • AUnderdamped
  • BCritically damped
  • COverdamped
  • DUndamped only
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Correct Answer: A. Underdamped
Explanation: A damping ratio between zero and one gives an underdamped response.
Reference: Standard control systems: second-order systems
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