Automatic Control Systems
Which of the following features is not associated with Nichols chart?

It is symmetric about -180°
(0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)
The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system
M loci are centred about (0 dB, -180°) point

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Automatic Control Systems
A lag compensator

Improves steady state behavior of the system
Speeds up the transient response of the system
Improves steady state behavior and speeds up the transient response of the system
Improves steady state behavior and preserves the transient response of the system

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