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Control Systems

Control Systems
The value of 'a' in to give phase margin = 45o will be

 0.707.
 1.414.
 1.18.
 0.9.

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Control Systems
Certain control system has input u(t) and output c(t). If the input is first passed through a block having transfer function e-s and unit gain is applied to the applied to the system. The modified output will be

 c(t-1).u(t-1)
 c(t-1).u(t)
 c(t).u(t-1)
 c(t)u(t)

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

 4T.
 2T.
 5T.
 3T.

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Control Systems
Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is

 LC.
 RC.
 RL.
 Any of the above.

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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?

 3/4
 1/2
 4/3
 1

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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 III
 TYPE I

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