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Control Systems

Control Systems
Find the Laplace transform for sinωt?

 1/s²
 1/s
 s/(s²+ω²)
 ω/(s²+ω²)

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Control Systems
Which of the following controller is also known as anticipatory controller?

 both 1 and 3
 derivative controller
 proportional controller
 integral controller

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Control Systems
Find the corner frequency for the following transfer function? G(s) = 1/(s+2)

 1/2 rad/s
 4 rad/s
 2 rad/s
 1/4 rad/s

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Control Systems
The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its closed loop transfer function is

 (2s+2)/(s+1)²
 (2s+1)/(s+1)²
 (2s+1)/s²
 (2s+2)/s²

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Control Systems
A system is stable for (where GM = Gain Margin and PM = Phase Margin):

 GM -ve.
 PM - ve.
 GM and PM both +ve.
 GM and PM both -ve.

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Control Systems
A transfer function is given as The steady state sinusoidal response will become zero at a frequency response of

 9 rad/s
 3 rad/s
 2 rad/s
 4 rad/s

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