Which one of the following statements is correct in respect of the theory of stability?
A. Phase margin is the phase angle lagging, in short of 180°, at the frequency corresponding to a gain of 10
B. Gain margin is the value by which the gain falls short of unity, at a frequency corresponding to 90° phase lag
C. Routh's-Hurwitz criterion can determine the degree of stability.
D. Gain margin and phase margin are the measure of the degree of stability
Answer: Option D
This Question Belongs to Electronics And Communications Engineering >> Control Systems
In root locus analysis the breakaway and break in points
A. lie on the real axis
B. Either lie on the real axis or occur in complex conjugate pairs
C. Always occur in complex conjugate pairs
D. None of the above
Which of the following features is not associated with Nichols chart?
A. (0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)
B. It is symmetric about -180°
C. M loci are centred about (0 dB, -180°) point
D. The frequency at intersection of G (j$$\omega $$) locus and M = +3 dB locus gives bandwidth of closed loop system
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