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The system 900 is be compensated such that its gain- (s + 1)(s + 9)
crossover frequency becomes same as its uncompensated phase-crossover frequency and provides a 45° phase margin. To achieve this, one may use
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- a lag compensator that provides an attenuation of 20 dB and a phase lag of 45° at the frequency of 3 √3 rad/s
- a lead compensator that provides an amplification of 20 dB and a phase lead of 45° at the frequency of 3 rad/s
- a lag-lead compensator that provides an amplification of 20 dB and a phase lag of 45° at the frequency of √3 rad/s.
- a lag-lead compensator that provides an attenuation of 20 dB and phase lead of 45° at the frequency of 3 rad/s
Correct Option: D
NA
