Question:
Consider a feedback system with gain margin of about 30. At what point does the Nyquist plot cross the negative real axis?
Consider a feedback system with gain margin of about 30. At what point does the Nyquist plot cross the negative real axis?
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The gain margin in a feedback system is related to the frequency at which the Nyquist plot crosses the negative real axis.
Updated On: May 4, 2025
- -3
- -0.3
- -30
- -0.03
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The Correct Option is B
Solution and Explanation
In a Nyquist plot for a feedback system, the gain margin is defined as the amount of gain change required to make the open-loop transfer function equal to -1. A gain margin of 30 means the Nyquist plot crosses the negative real axis at -0.3.
Thus, the correct answer is -0.3.
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