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Control Systems

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

 3/4
 3/7
 3/5
 4/5

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

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Control Systems
Find the angles of asymptotes of the open loop transfer function G(s) = k(s + 1)/((s(s+2)(s+4)?

 90°,270°
 90°,180°
 60°,240°
 0°, 180°

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Control Systems
The characteristic equation of a control system is given below: The system is

 stable
 critical stable
 unstable
 marginally stable

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Control Systems
Weighting function is in terms of -----------------

 Laplace transform of the ramp response
 Laplace transform of the step response
 Laplace transform of the parabolic response
 Laplace transform of the impulse response

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Control Systems
A transfer function has a zero at s = -1 and poles at s = -1 ± j1. The multiplier being unity, if the input is step function, the steady state response is given by

 0.5∠10°
 0.5∠0°
 2∠90°
 1∠0°

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