In a control system, the comparator measures the difference between

In a control system, the comparator measures the difference between (a) output and input (b) output of controller and system (c) actual and desired performance (d) input and error signal  
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Description : The open loop control system is one in which _____.

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For a stable feedback control system, the phase margin is

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Last Answer : For a stable feedback control system, the phase margin is always positive

For a feedback control system of type 2, the steady error for a rap input is

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Last Answer : For a feedback control system of type 2, the steady error for a rap input is Zero 

For a 2nd order feedback control system, the peak resonance magnitude should be Mp ≤ 1.15. Hence the

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Last Answer : For a 2nd order feedback control system, the peak resonance magnitude should be Mp ≤ 1.15. Hence the damping ratio (δ) is 0.5

In order to regulate steady state error to zero, in a negative feedback control system, one employs

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Last Answer : In order to regulate steady state error to zero, in a negative feedback control system, one employs Integral control

A differentiator is not usually used in control system, because it : -

Description : A differentiator is not usually used in control system, because it : - (A) reduces damping  (B) increases error  (C) reduces gain margin  (D) increases input noise

Last Answer : A differentiator is not usually used in control system, because it : - increases input noise

A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the

Description : A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system (A) crosses the real axis at +0.1 (B) crosses the real axis at -0.1. (C) crosses the imaginary axis at -0.1 (D) crosses the imaginary axis at +0.1

Last Answer : A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system crosses the real axis at -0.1.

Negative feedback in a closed-loop control system DOES NOT

Description : Negative feedback in a closed-loop control system DOES NOT (A) reduce the overall gain (B) reduce bandwidth (C) improve disturbance rejection (D) reduce sensitivity to parameter variation

Last Answer : Negative feedback in a closed-loop control system DOES NOT reduce bandwidth

In the Bode plot of a unity feedback control system, the value of phase of G(jw) at the gain cross -over...

Description : In the Bode plot of a unity feedback control system, the value of phase of G(jw) at the gain cross -over frequency is - 125°.. The phase margin of the system is (a) - 125° (b) - 55° (c) 55° (d) 125°

Last Answer : In the Bode plot of a unity feedback control system, the value of phase of G(jw) at the gain cross -over frequency is - 125°.. The phase margin of the system is 55°

For a type three-control system the asymptote at lower frequency will have a slope...

Description : For a type three-control system the asymptote at lower frequency will have a slope  A) – 6 db per octave B) – 18 db per octave C) – 20 db per octave D) – 60 db per octave

Last Answer : b

In a closed loop control system ...

Description : In a closed loop control system  (a) control action depends upon the output and also on the input command (b) output signal is fed back to be compared with the reference signal (c) the accuracy is better than in the open loop system (d) all of the above

Last Answer : In a closed loop control system control action depends upon the output and also on the input command , output signal is fed back to be compared with the reference signal , the accuracy is better than in the open loop system. 

In a closed-loop system in which the output is the speed of a motor, the output rate control can be used to_________.

Last Answer : In a closed-loop system in which the output is the speed of a motor, the output rate control can be used to limit the acceleration of the motor.

The first order control system, which is well designed, has a?

Description : The first order control system, which is well designed, has a?

Last Answer : The first order control system, which is well designed, has a large negative transfer function pole.

In a control system integral error compensation _______ steady state error.

Description : In a control system integral error compensation _______ steady state error.

Last Answer : In a control system integral error compensation minimizes steady state error.

A differentiator is usually not a part of a control system because it?

Last Answer : A differentiator is usually not a part of a control system because it increases input noise.

In a control system the output of the controller is given to?

Description : In a control system the output of the controller is given to?

Last Answer : In a control system the output of the controller is given to final control element.

A control system with excessive noise, is likely to suffer from?

Description : A control system with excessive noise, is likely to suffer from?

Last Answer : A control system with excessive noise, is likely to suffer from saturation in amplifying stages.

_____is an open loop control system.

Description : _____is an open loop control system.

Last Answer : Field controlled D.C. motor is an open loop control system.

The output of a feedback control system must be a function of?

Description : The output of a feedback control system must be a function of?

Last Answer : The output of a feedback control system must be a function of reference and output.

An automatic toaster is a ______ loop control system.

Description : An automatic toaster is a ______ loop control system.

Last Answer : An automatic toaster is an open loop control system.