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Control SystemsNyquist Stability

The Nyquist plot is a mapping of a contour from the?

  • As-plane through the loop transfer function
  • BTime domain directly into the z-plane only
  • COutput plane into the input plane
  • DRoot locus into the Routh array
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Correct Answer: A. s-plane through the loop transfer function
Explanation: Nyquist analysis maps the Nyquist contour in the s-plane through the loop transfer function L(s)=G(s)H(s).
Reference: Standard control systems: nyquist stability
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