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

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

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Related questions

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

Asynchronous circuits are usually faster than synchronous circuits because

Description : Asynchronous circuits are usually faster than synchronous circuits because

Last Answer : Asynchronous circuits are usually faster than synchronous circuits because they are free running and do not depend on the frequency of the clock

increases the steady state accuracy. (a) Integrator (b) Differentiator (c) Phase lead compensator (d) Phase lag compensator Ans:A 10.As a result of introduction of negative feedback which of the following will not decrease ? (a) Band width (b) Overall gain (c) Distortion (d) Instability

Description : increases the steady state accuracy. (a) Integrator (b) Differentiator (c) Phase lead compensator (d) Phase lag compensator Ans:A 10.As a result of introduction of negative feedback which of the following will not decrease ? (a) Band width (b) Overall gain (c) Distortion (d) Instability

Last Answer : Ans: A

What are the limitations of the basic differentiator circuit?

Description : What are the limitations of the basic differentiator circuit?

Last Answer : 1.At high frequency, a differentiator may become unstable and break into oscillations  2,The input impedance decreases with increase in frequency , thereby making the circuit sensitive to high frequency noise.

What is the difference between an RC and an RL differentiator in terms of where the output is developed?

Description : What is the difference between an RC and an RL differentiator in terms of where the output is developed? is developed?

Last Answer : . In an RC circuit the output is taken across the resistor. In the RL circuit the output is taken across the inductor.

State the condition for RC differentiator. Draw the output waveform of RC integrator for square wave input.

Description : State the condition for RC differentiator. Draw the output waveform of RC integrator for square wave input.

Last Answer : Condition for RC differentiator: If the time duration T of the input waveform is comparable with the RC time constant (product of R and C) then the output waveform of the differentiator gets distorted. Hence for proper differentiator the condition is as follows: T >>RC

Compare Integrator and differentiator.

Description : Compare Integrator and differentiator.

Last Answer : Sr. No. Integrator Differentiator 1 A circuit that gives an output voltage directly proportional to the integral of its input is known as an integrating circuit. A circuit that gives an output voltage directly ... is a low pass filter. It is a high pass filter. 5

Draw RC differentiator circuit.

Description : Draw RC differentiator circuit.

Last Answer : RC differentiator circuit :

With the help of circuit diagram and waveforms, explain working of RC differentiator.

Description : With the help of circuit diagram and waveforms, explain working of RC differentiator.

Last Answer : Fig: RC differentiating circuit Figure shows a RC differential circuit. It is also known as high pass filter. The reactance of a capacitor decreases with increasing frequency. The higher ... i.e. the output signal is directly proportional to the derivative of the input signal.  

Compare RC integrator with RC differentiator

Description : Compare RC integrator with RC differentiator

Last Answer : Compare RC integrator with RC differentiator

In an op-amp differentiator

Last Answer : In an op-amp differentiator the amplitude of output is proportional to rate of change of input.

Draw the labeled block diagram of process control system and explain each block.

Description : Draw the labeled block diagram of process control system and explain each block.

Last Answer : Explanation - Process control system consists of process or plant, sensor, error detector, automatic Controller, actuator or control element. 1) Process or plant- process means some manufacturing sequence ... process which changes the process variable. Output of this block is denoted by u .

Explain the significance of the Laplace transform in control system.

Description : Explain the significance of the Laplace transform in control system.

Last Answer : Significance of Laplace Transform- * Laplace transform convert higher order integral differential equation into simple algebraic form. * Laplace transform converts the differential equation into an algebraic ... equations. * Laplace transform convert time domain to frequency domain (s-plane). 

The open loop control system is one in which _____.

Description : The open loop control system is one in which _____.

Last Answer : the output is independent of output

In a control system, the comparator measures the difference between

Description : 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  

Last Answer : B

For a stable feedback control system, the phase margin is

Description : For a stable feedback control system, the phase margin is  a) always positive b) always negative c) may be positive or negative d) always greater than 180o

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

Description : For a feedback control system of type 2, the steady error for a rap input is  A) Infinite B) Constant C) Zero D) Indeterminate

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

Description : For a 2nd order feedback control system, the peak resonance magnitude should be Mp ≤ 1.15. Hence the damping ratio (δ) is  (a) 0.1 (d) 0.5 (c) 0.707 (d) 1

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

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

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

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.

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.

A control system working under unknown random actions is called

Description : A control system working under unknown random actions is called 

Last Answer : A control system working under unknown random actions is called stochastic control system.

In closed loop control system, with positive value of feedback gain the overall gain of the system will

Description : In closed loop control system, with positive value of feedback gain the overall gain of the system will

Last Answer : In closed loop control system, with positive value of feedback gain the overall gain of the system will decrease.

A control system in which the control action is somehow dependent on the output is known as

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Last Answer : A control system in which the control action is somehow dependent on the output is known as Closed loop system.

In an open loop control system?

Last Answer : In an open loop control system Output is independent of control input.

What are the advantages of open loop control system?

Description : What are the advantages of open loop control system?

Last Answer : Open loop control system are simple to design. Open loop control system are generally stable.

what is open loop and close loop control system?

Description : what is open loop and close loop control system?

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State the principle of ON-OFF control action. Write its standard equation & define neutral zone.

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The standard for long distance analog signal transmission in process control industry is

Description : The standard for long distance analog signal transmission in process control industry is (A) 4-20 mV (B) 0-20 mA (C) 4-20 mA (D) 0-5 V

Last Answer : The standard for long distance analog signal transmission in process control industry is 4-20 mA

In pneumatic control systems the control valve used as final control element converts

Description : In pneumatic control systems the control valve used as final control element converts 

Last Answer : In pneumatic control systems the control valve used as final control element converts pressure signal to position change.

Define servo system. Draw the block diagram of DC Servo System.

Description : Define servo system. Draw the block diagram of DC Servo System.

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Define stability. Sketch the root locations in the s-plane for stable and unstable system.

Description : Define stability. Sketch the root locations in the s-plane for stable and unstable system.

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What will happen to the gain margin if the gain of the open loop system is doubled?

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Last Answer : What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth 

What is the time response of a system whose poles lie on the right hand side of s-plane?

Description : What is the time response of a system whose poles lie on the right hand side of s-plane? A) Exponentially increasing B) Exponentially decreasing C) Sinusoidal oscillations D) Step response 

Last Answer : What is the time response of a system whose poles lie on the right hand side of s-plane? A) Exponentially increasing B) Exponentially decreasing C) Sinusoidal oscillations D) Step response 

What is the steady state error of type-0 system for ramp input?

Description : What is the steady state error of type-0 system for ramp input?  A) ∞ B) A/K C) A/(1+K) D) 0

Last Answer : What is the steady state error of type-0 system for ramp input?  A) ∞ B) A/K C) A/(1+K) D) 0

A system is critically damped. If the gain of the system is increased, the system will behave as:

Description : A system is critically damped. If the gain of the system is increased, the system will behave as: A) overdamped B) underdamped C) oscillatory D) critically damped

Last Answer : A system is critically damped. If the gain of the system is increased, the system will behave as: underdamped

A PD controller is used to compensate a system. Compared to the uncompensated system, the compensated

Description : A PD controller is used to compensate a system. Compared to the uncompensated system, the compensated system has: (1) A higher type number. (2) Reduced damping. (3) Higher noise amplification. (4) Larger transient overshoot. 

Last Answer : A PD controller is used to compensate a system. Compared to the uncompensated system, the compensated system has: Higher noise amplification.

Which one most appropriate dynamic system? (1) y(n) + y(n – 1) + y(n + 1) (2) y(n) + y(n – 1)

Description : Which one most appropriate dynamic system? (1) y(n) + y(n – 1) + y(n + 1) (2) y(n) + y(n – 1) (3) y(n) = x(n) (4) y(n) + y(n – 1) + y(n + 3) = 0 

Last Answer : Which one most appropriate dynamic system? (1) y(n) + y(n – 1) + y(n + 1) (2) y(n) + y(n – 1) (3) y(n) = x(n) (4) y(n) + y(n – 1) + y(n + 3) = 0 

Introduction of integral action in the forward path of a unity feedback system results in a

Description : Introduction of integral action in the forward path of a unity feedback system results in a  A) Marginally stable system B) System with no steady state error C) System with increased stability margin D) System With better speed of response

Last Answer : Introduction of integral action in the forward path of a unity feedback system results in a System with no steady state error