Physics · Control Systems
According to the Nyquist stability criterion, if a Nyquist plot encircles the point (-1, 0) N times in the counter-clockwise direction, and P is the number of open-loop poles in the right-half of the s-plane, the number of closed-loop poles (Z) in the right-half plane is given by Z = P - N. Expressing the number of open-loop poles (P) in terms of N and Z, which of the following is correct?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1P = N - Z
- 2P = Z - N✓
- 3P = N + Z2
- 4P = Z + N
Correct answer
P = Z - N
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