- A. True
- B. False
Automatic Control Systems
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Nichol’s chart is symmetric about – 180° axis.
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Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.
- A. True
- B. False
-
In force current analogue, mechanical mobility is analogous to_____.
- A. Impedance Z
- B. Admittance Y
- C. Reactance X
- D. Conductance G
-
Which of the following is correct?
- A. Speed torque characteristics of permanent magnet dc servomotor is more flat than that of wound field dc servomotor
- B. Speed torque characteristics of wound field dc servo- motor is more flat than that of per-manent magnet dc servo motor
- C. Speed torque characteristics of wound field and permanent magnet dc servomotor are equally flat
- D. None of the above
-
The sensor generally used in incremental optical encoder is_____.
- A. LED
- B. LCD
- C. Photodiode
- D. Either (a) or (b)
-
Temperature is analogous to_____.
- A. Voltage
- B. Flux
- C. Charge
- D. None of the above
-
A system is highly oscillatory if_____.
- A. Gain margin is high
- B. Gain margin is close to 1
- C. Gain margin is close to 1 or phase margin is zero
- D. Gain margin is high and phase margin is 180°
-
A lag compensator_____.
- A. Speeds up the transient response of the system
- B. Improves steady state behavior of the system
- C. Improves steady state behavior and speeds up the transient response of the system
- D. Improves steady state behavior and preserves the transient response of the system
-
In control systems the output of sensor usually, is_____.
- A. Analog electrical signal
- B. Digital electrical signal
- C. Mechanical signal
- D. Analog or digital electrical signal
-
The addition of a pole to the open loop transfer function pulls the root locus_____.
- A. To the right
- B. To the left and making the system more stable
- C. Towards right or left depending on the position of new pole
- D. None of the above