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Control Systems

Control Systems
Given the Laplace transform of f(t) = F(s), the Laplace transform of (f(t)e-at) is equal to

 e-as*F(s)
 F(s+a)
 eas*F(s)
 F(s)/(s+a)

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Control Systems
A second order control system has a transfer function 16/(s² + 4s + 16). What is the time for the first overshoot?

 π/4√3 sec
 π/2√3 sec
 π/√3 sec
 2π/√3 sec

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Control Systems
A second order control system is defined by the following equation: 4 d²c(t)/dt² + 8 dc(t)/dt + 16 c(t) = 16 u(t) The damping ratio and natural frequency for this system are respectively

 0.25 and 2 rad/s
 0.25 and 4 rad/s
 0.50 and 2 rad/s
 0.50 and 4 rad/s

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

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

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Control Systems
Settling time for 5% tolerance band is -------------

 2T.
 5T.
 4T.
 3T.

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Control Systems
Find the bandwidth of the system, when rise time of the system is give as 1msec?

 500 Hz
 1 kHz
 750 Hz
 350 Hz

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