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Control Systems

Control Systems
If the magnitude of G(jω)H(jω) at phase crossover frequency is 0.5. Find the gain margin of the given system?

 1
 0.5
 4
 2

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Control Systems
For a lead compensator, the poles lie:

  on origin.
  on LHS.
  on RHS.
  on LHS before zero.

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Control Systems
Angle of asymptotes for complimentary root locus is

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

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Control Systems
Let P = Number of open loop poles and Z = Number of open loop zeros and P > Z, find the number of branches terminating at ∞?

 P - Z
 P
 Any of the above
 Z

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

 infinity.
 0.
 10.
 50.

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Control Systems
Settling time for 5% tolerance band is -------------

 4T.
 3T.
 2T.
 5T.

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