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Control SystemsStatic Error Constants

For a unity-feedback system, the position error constant Kp is?

  • Alim s->0 G(s)
  • Blim s->0 sG(s)
  • Clim s->0 s²G(s)
  • Dlim s->infinity G(s)
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Correct Answer: A. lim s->0 G(s)
Explanation: For unity feedback, Kp=lim(s→0)G(s).
Reference: Standard control systems: static error constants
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