Nyquist stability criterion uses open loop frequency response characteristics.
Nyquist stability criterion uses open loop frequency response characteristics.
Temperature is analogous to
Temperature is analogous to
A lead compensator
A lead compensator
Which dc servomotor requires strongest permanent magnet?
Which dc servomotor requires strongest permanent magnet?
A system is highly oscillatory if
A system is highly oscillatory if
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.
Which control action can never be used alone?
Which control action can never be used alone?
Integral control action
Integral control action
Which of the following is correct?
Which of the following is correct?
For type 1 system the velocity lag error is
For type 1 system the velocity lag error is
In Bode plots the frequency at which two asymptotes meet is called corner frequency.
In Bode plots the frequency at which two asymptotes meet is called corner frequency.
Magnetic amplifier is used for
Magnetic amplifier is used for
Which of the following is open loop system?
Which of the following is open loop system?
If the poles lie in second quadrant, damping ratio is
If the poles lie in second quadrant, damping ratio is
If poles lie in first quadrant, damping ratio is
If poles lie in first quadrant, damping ratio is
The permanent magnet field system of brushless dc servo- motor is generally on
The permanent magnet field system of brushless dc servo- motor is generally on
A lag compensator
A lag compensator
Lag compensation permits a high gain at low frequencies.
Lag compensation permits a high gain at low frequencies.
In the field controlled motor the entire damping comes from
In the field controlled motor the entire damping comes from
M circles are symmetrical with respect to
M circles are symmetrical with respect to
Nichols chart consists of
Nichols chart consists of
The relative stability of a system is given by
The relative stability of a system is given by
The effect of adding poles and zeros can be determined quickly by
The effect of adding poles and zeros can be determined quickly by
Which of the following features is not associated with Nichols chart?
Which of the following features is not associated with Nichols chart?
In force current analogue, mechanical mobility is analogous to
In force current analogue, mechanical mobility is analogous to
In a two phasor servomotor, the direction of rotation of the rotating field depends on
In a two phasor servomotor, the direction of rotation of the rotating field depends on
A conditionally stable system is stable for the value of gain between two critical values. It is unstable if
A conditionally stable system is stable for the value of gain between two critical values. It is unstable if
In control systems the output of sensor usually, is
In control systems the output of sensor usually, is
In a simple on-off controller with differential gap, the magnitude of differential gap determines
In a simple on-off controller with differential gap, the magnitude of differential gap determines
For any transfer function, the constant phase angle loci are
For any transfer function, the constant phase angle loci are
If any term in the first column of a Routh array becomes zero, then
If any term in the first column of a Routh array becomes zero, then
Robotic manipulator arms mostly use
Robotic manipulator arms mostly use
In force current analogy, displacement x is analogous to
In force current analogy, displacement x is analogous to
The complicated shapes in the polar plots are only due to time constants in the numerator of transfer functions.
The complicated shapes in the polar plots are only due to time constants in the numerator of transfer functions.
The poles with greater displacement from the real axis correspond to
The poles with greater displacement from the real axis correspond to
The sensor generally used in incremental optical encoder is
The sensor generally used in incremental optical encoder is
Transport lag usually exists in
Transport lag usually exists in
Which of the following can be used as a rotating amplifier in a control system?
1. Amplidyne
2. Separately excited dc generator
3. Synchro
4. Self excited dc generator
Which of the following can be used as a rotating amplifier in a control system?
1. Amplidyne
2. Separately excited dc generator
3. Synchro
4. Self excited dc generator
Nichol’s chart is symmetric about – 180° axis.
Nichol’s chart is symmetric about – 180° axis.
DC tachogenerator can be used in
DC tachogenerator can be used in
Which of the following is used to obtain output position in a position control system?
Which of the following is used to obtain output position in a position control system?
The addition of a pole to the open loop transfer function pulls the root locus
The addition of a pole to the open loop transfer function pulls the root locus
In root locus analysis the breakaway and break in points
In root locus analysis the breakaway and break in points
The distance of poles from origin depends on
The distance of poles from origin depends on
Bandwidth is proportional to speed of response.
Bandwidth is proportional to speed of response.
