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

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

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

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Related questions

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°

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.

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 

For a system with derivative feedback, forward path transfer is G(s) = I / (s2 + s + 1) and feedback path

Description : For a system with derivative feedback, forward path transfer is G(s) = I / (s2 + s + 1) and feedback path transfer is H(s) = Ks. What is the value of K to obtain a critically-damped closed loop transient response.  (a) 0.5 (b) 0.707 (c) 1 (d) 1.414

Last Answer : For a system with derivative feedback, forward path transfer is G(s) = I / (s2 + s + 1) and feedback path transfer is H(s) = Ks. What is the value of K to obtain a critically-damped closed loop transient response.  (a) 0.5 (b) 0.707 (c) 1 (d) 1.414

Given a unity feedback system with G(s)=k/s (s+4), the value of k for damping ratio of 0.5 is

Description : Given a unity feedback system with G(s)=k/s (s+4), the value of k for damping ratio of 0.5 is

Last Answer : Given a unity feedback system with G(s)=k/s (s+4), the value of k for damping ratio of 0.5 is 16

With negative feedback, the system stability and system gain respectively

Description : With negative feedback, the system stability and system gain respectively (a) Increases and increases (b) Increases and decreases (c) Decreases and increases (d) Decreases and decreases

Last Answer : increases and decreasses

The transient response, with feedback system,?

Description : The transient response, with feedback system,?

Last Answer : The transient response, with feedback system, decays quickly.

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.

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

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

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

The effect of negative feedback on distortion and bandwidth is A) Both distortion and bandwidth get

Description : The effect of negative feedback on distortion and bandwidth is A) Both distortion and bandwidth get decreased B) Both distortion and bandwidth get increased C) Distortion is reduced and bandwidth is increased D) Distortion is increased and bandwidth is decreased 

Last Answer : The effect of negative feedback on distortion and bandwidth is Distortion is reduced and bandwidth is increased

With feedback _____ increases.

Description : With feedback _____ increases.

Last Answer : With feedback system stability increases.

_________is the reference input minus the primary feedback.

Description : _________is the reference input minus the primary feedback.

Last Answer : Actuating signal is the reference input minus the primary feedback.

Regenerative feedback implies feedback with?

Description : Regenerative feedback implies feedback with?

Last Answer : Regenerative feedback implies feedback with a positive sign.

If a step function is applied to the input of a system and the output...

Description : If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is?

Last Answer : If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is not necessarily stable.

Basic operating characteristics of the operational amplifier such as gain and stability are the function of its _____________. A. differential input stage B. power output stage C. feedback circuit D. supply voltages

Description : Basic operating characteristics of the operational amplifier such as gain and stability are the function of its _____________. A. differential input stage B. power output stage C. feedback circuit D. supply voltages

Last Answer : Answer: C

Consider a continuous-time system with input x(t) & output y(t) are related by y(t) = x (sin t). This system is

Description : Consider a continuous-time system with input x(t) & output y(t) are related by y(t) = x (sin t). This system is (A) causal & linear (B) non-causal & linear (C) causal & non-linear (D) non-causal & non-linear

Last Answer : Consider a continuous-time system with input x(t) & output y(t) are related by y(t) = x (sin t). This system is non-causal & linear

Which terminology deals with the excitation or stimulus applied to the system from an external source for the generation of an output? a. Input signal b. Output signal c. Error signal d. Feedback signal

Description : Which terminology deals with the excitation or stimulus applied to the system from an external source for the generation of an output? a. Input signal b. Output signal c. Error signal d. Feedback signal

Last Answer : Ans: A

Draw typical wiring details & four specifications of AC output module of PLC.

Description : Draw typical wiring details & four specifications of AC output module of PLC.

Last Answer : The below figure show the basic field wiring for digital 120V AC output module. The Wiring diagrams show how wires of output devices are connected to screw terminals of PLC modules. As per the wiring ... excessive current from damaging the wiring to the field devices.  Specifications:-

List any four input and four output devices used with PLC.

Description : List any four input and four output devices used with PLC.

Last Answer : Input device: 1. Push button. 2. Temperature switches. 3. Limit switches. 4. Pressure switches. 5. Level Switches. 6. Proximity Switches. Output devices: 1. Motor. 2. Display. 3. Heater coil. 4. Relay. 5. Lamp. 6. Buzzer.

A phase lag lead network introduces in the output?

Description : A phase lag lead network introduces in the output?

Last Answer : A phase lag lead network introduces in the output lag at low frequencies and lead at high frequencies.

Any externally introduced signal affecting the controlled output is called a?

Description : Any externally introduced signal affecting the controlled output is called a?

Last Answer : Any externally introduced signal affecting the controlled output is called a stimulus.

The initial response when the output is not equal to input is called?

Description : The initial response when the output is not equal to input is called?

Last Answer : The initial response when the output is not equal to input is called Transient response.

The conversion of the throttle command voltage to the signal necessary to achieve the desired shaft RPM is accomplished by the _____________. A. ahead or astern function generator of the throttle control circuit B. feedback resistor of the summing amplifier circuit C. operational amplifiers in the autorotation circuit D. long time constant amplifier circuit

Description : The conversion of the throttle command voltage to the signal necessary to achieve the desired shaft RPM is accomplished by the _____________. A. ahead or astern function generator of the ... circuit C. operational amplifiers in the autorotation circuit D. long time constant amplifier circuit

Last Answer : Answer: A

Benefits of negative feedback include A. less distortion B. increased bandwidth C. low output resistance D. all of above

Description : Benefits of negative feedback include A. less distortion B. increased bandwidth C. low output resistance D. all of above

Last Answer : all of above

Part number, partdescription, and number of parts ordered are examples of– (A) contro(B) output (C) processing (D) feedback (E) inputl

Description : Part number, partdescription, and number of parts ordered are examples of– (A) control (B) output (C) processing (D) feedback (E) input

Last Answer : input

select the correct response from the choices given in the parentheses. Q-20. In a closed-loop configuration the output signal is determined by (the input signal, the feedback signal, both).

Description : select the correct response from the choices given in the parentheses. Q-20. In a closed-loop configuration the output signal is determined by (the input signal, the feedback signal, both).

Last Answer : Both the input signal and the feedback signal.

Comment on the effect of negative feedback on the gain, input and output resistance of the feedback amplifiers.Describe the gain bandwidth product term used in this context and its importance.

Description : Comment on the effect of negative feedback on the gain, input and output resistance of the feedback amplifiers.Describe the gain bandwidth product term used in this context and its importance.

Last Answer : Effect of negative feedback: 1. Gain decreases with negative feedback. 2. Input resistance increases with negative feedback. 3. Output resistance decreases with negative feedback. Explanation ... feedback bandwidth increases which means it is stable output on more range of frequency.

An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ.

Description : An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 would be: (1) 1/11 kΩ (2) 1/5 kΩ (3) 5 kΩ (4) 11 kΩ

Last Answer : An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 would be: 1/11 kΩ

The driving point impedance with poles at ω = 0(zero) and ω = ∞ (infinity) must have the

Description : The driving point impedance with poles at ω = 0(zero) and ω = ∞ (infinity) must have the  (a) s term in the denominator and an excess term in the numerator (b) s term in the ... the numerator and denominator (d) s term in the denominator and equal number of terms in the numerator and denominator

Last Answer : The driving point impedance with poles at ω = 0(zero) and ω = ∞ (infinity) must have the s term in the denominator and an excess term in the numerator

The gain of an ideal amplifier must be

Description : The gain of an ideal amplifier must be

Last Answer : The gain of an ideal amplifier must be infinity

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

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

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. 

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.

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.

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.