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Control Systems

Control Systems
When the system gain is doubled the gain margin becomes?

 1/2 times
 2 times
 Remains unaffected
None of these

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Control Systems
Force balancing equation for elastic element (K) is (where, x = displacement)

None of these
 K dx/dt
 K d2x/dt2
 K *x

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Control Systems
A second order control system is defined by the following equation: 4 d²c(t)/dt² + 8 dc(t)/dt + 16 c(t) = 16 u(t) The damping ratio and natural frequency for this system are respectively

 0.25 and 2 rad/s
 0.50 and 4 rad/s
 0.50 and 2 rad/s
 0.25 and 4 rad/s

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Control Systems
A second order control system has a transfer function 16/(s² + 4s + 16). Find the settling time for 2% tolerance?

 5 sec
 4 sec
 2 sec
 10 sec

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Control Systems
The magnitude of a transfer function G(jω)H(jω) at gain cross over frequency is

 1
 any of the above
 0
 infinity

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Control Systems
The amplitude spectrum of a Gaussian pulse is

 Uniform.
 Impulse function.
 A sine function.
 Gaussian.

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