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Control Systems

Control Systems
The closed loop transfer function of a system is 25/(s² + 25). The settling time of the system is

 ∞ sec
 1 sec
 25 sec
 5 sec

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

 0.707.
 1.18.
 0.9.
 1.414.

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Control Systems
A second order system has peak over shoot = 50% and period of oscillations 0.2 seconds. Find the resonant frequency?

 30.63 rad/s
 31.41 rad/s
 29.74 ra/s
 32.16 rad/s

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Control Systems
Which of the following is/are represents the lead compensator?

 (s+2)/(s+5)
 (s+2)/(s+1)
 (s+5)/(s+6)
 both 2 and 3

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Control Systems
For a unity feedback control system open loop transfer function then acceleration error constant is

 0.
 50.
 20.
 infinity.

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Control Systems
Which of the following is/are the advantages of a closed loop control system?

 nether 1 nor 2.
 The closed loop systems are less affected by noise.
 The closed loop systems are accurate.
 both 1 and 2.

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