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Control Systems

Control Systems
Find the Laplace transform for sinωt?

 s/(s²+ω²)
 ω/(s²+ω²)
 1/s²
 1/s

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Control Systems
The transfer function of the system described by d²/dt²(y(t)) + 3d/dt(y(t)) + 2y(t) = 5u(t) with u(t) as input and y(t) as output is

 5/(s²+3s+2)
 s(s²+3s+2)/5
 5/s(s²+3s+2)
 (s²+3s+2)/5

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Control Systems
The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the initial value?

 0
 3/9
 3/5
 1/4

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Control Systems
Which of the following is/are the example of actuator?

 All
 Pneumatic motor
 Electric motor
 Hydraulic motor

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

 1.18.
 0.707.
 1.414.
 0.9.

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Control Systems
The compensator would provide a maximum phase shift of

 30o.
 45o.
 60o.
 20o.

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