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Control Systems

Control Systems
Slope of asymptote in Bode plot of 2nd order system is _____________________ per octave.

 6 dB
 12 dB
 3 dB
 18 dB

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Control Systems
Lead compensator is used to improve ------------------

None of these
 Transient response
 Both 1 and 2
 Steady state response

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Control Systems
A proportional plus derivative controller

 increases the stability of the system
 improves the steady state accuracy
 has high sensitivity
 both 1 and 2

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Control Systems
Which of the following statements is/are true?

 Centroid may not be a part of root locus
 both 1 and 2
 nether 1 nor 2
 Centroid may be a part of root locus

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Control Systems
A open loop transfer function is given as G(s) = (s+2)/(s+1)(s-1). Find the number of encirclements about '-1+j0'?

 1
 0
 3
 2

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Control Systems
The value of 'a' in to give phase margin = 45o will be

 1.18.
 0.707.
 0.9.
 1.414.

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