The characterstic equation of a feedback control system is given by s3+5s2+(K+6)s+K=0 Where K>0 is a scaler variable parameter. In the root-loci diagram of the system, the asymptotes of the root-locus for large values of K meet at a point in the s-plane, whose coordinates are

1.  (-3,0)

2.  (-2,0)

3.  (-1,0)

4.   (2,0)

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4
Correct Answer :

(-2,0)


Explanation :
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A unity feedback system ha an open-loop transfer function of the form KG(s)=; b>a Which of the loci shown in the figure can be valid root-loci for the system

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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A unity feedback system has an open loop transfer function, G(s)=The root locus plot is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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For a gain constant K, the phase-lead compensator

1.  reduces the slope of the magnitude curve in the entire range of frequency domain

2.  decrease the gain cross-over frequency

3.  reduce the phase margin

4.   reduce the reasonance peak Mp

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4
Correct Answer :

reduces the slope of the magnitude curve in the entire range of frequency domain


Explanation :
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Laplace transform of is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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Consider the following statements: Lead compensator 1.Increase the margin of stability 2.Speed up transient response 3.Does not affect the system error constant of these statements

1.  2 and 3 are correct

2.  1 and 2 are correct

3.  1 and 3 are correct

4.   1,2 and 3 are correct

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4
Correct Answer :

1 and 2 are correct


Explanation :
No Explanation available for this question

The maximum phase shift that can be provided by a lead compensator with transfer function G(s)=is

1.  150

2.  300

3.  450

4.  600

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4
Correct Answer :

300


Explanation :
No Explanation available for this question

A phase-lag compensation will

1.  improve relative stability

2.  increase the speed of response

3.  increase bandwidth

4.   increase overshoot

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4
Correct Answer :

increase overshoot


Explanation :
No Explanation available for this question

The maximum phase shift that can be obtained by using a lead compensator with transfer function Gc(s)=is equal to

1.  150

2.  300

3.  450

4.  600

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4
Correct Answer :

300


Explanation :
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A phase-lead compensator has the transfer function Gc(s)=The maximum phase angle lead provided by this compensator will occur at a frequency ωm is equal to

1.  50 rad/sec

2.  25 rad/sec

3.  10 rad/sec

4.   4 rad/sec

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4
Correct Answer :

50 rad/sec


Explanation :
No Explanation available for this question
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