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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

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

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Control Systems
When compared to a 1st order LPF, a 2nd order LPF has

 higher cut off frequency.
 lower voltage gain.
 higher voltage gain.
 faster drop in filter response.

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Control Systems
A function y (t) satisfies the following differential equation : Where, δ (t) is the delta function. Assuming zero initial condition and denoting the unit step function by u(t), y(t) can be formed as

 e-tu(t).
 etu(t).
 et.
 e-t.

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

 All
 Hydraulic motor
 Pneumatic motor
 Electric motor

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Control Systems
The poles of the second order system are at -3 ± j4. The damping ratio of the system is

 3/7
 4/5
 3/4
 3/5

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Control Systems
Consider a network function H(s) = 2(s+3)/{(s+2)(s+4)}. What is the steady state response due to step input?

 1
 3/4
 4/3
 1/2

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