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Control SystemsFrequency Response

For a minimum-phase stable loop, larger positive phase margin generally indicates?

  • AGreater relative stability and damping tendency
  • BGuaranteed instability
  • CZero bandwidth
  • DInfinite steady-state error
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Correct Answer: A. Greater relative stability and damping tendency
Explanation: Within ordinary design tradeoffs, a larger positive phase margin generally corresponds to greater relative stability and a more damped closed-loop response.
Reference: Standard control systems: frequency response
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