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Control Systems

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

 0.
 20.
 infinity.
 50.

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Control Systems
In polar plots if the critical point '-1+j0' is enclosed then the system is --------

 stable
 marginally stable
 critical stable
 unstable

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Control Systems
The low frequency and high frequency asymptotes of Bode magnitude plot are respectively -60dB/decade and -40dB/decade. What is the type of the system?

 TYPE II
 TYPE 0
 TYPE I
 TYPE III

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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

 etu(t).
 et.
 e-tu(t).
 e-t.

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Control Systems
Find the relation of damped natural frequency (ωd)

 (ωn) √(1-ζ²)
 (ωn) √(1-4ζ²)
 (ωn) √(1-2ζ²)
 (ωn) √(1-1/ζ²)

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Control Systems
Angle of asymptotes for complimentary root locus is

 (2q+1)*180/(P-Z)
 (2q+1)*180/P
 (2q)*180/(P-Z)
 (2q)*180/P

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