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Which one of the following methods can determine the closed loop system resonance frequency operation?

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Which one of the following methods can determine the closed loop system resonance frequency operation?

(a) Root locus method

(b) Nyquist method

(c) Bode plot

(d) M and N circle

This question was addressed to me in a job interview.

Question is taken from Frequency Response in chapter Frequency Response Analysis of Control Systems

1 Answer

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Best answer
Right choice is (d) M and N circle

For explanation I would say: Closed loop system resonance frequency is the frequency at which maximum peak occurs and this frequency of operation can best be determined with the help of M and N circle.

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