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Control Systems

Control Systems
What is the order of a closed loop control system for a plant with a transfer function equal to G(s) = k/s²(1+Ts) and with unity feedback

 2
 0
 1
 3

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Control Systems
What is the open loop DC gain of a unity feedback control system having closed loop transfer function as

 4/9
 13/4
 9/4
 4/13

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Control Systems
At which frequency does the Bode magnitude plots for the functions K/S2 have gain crossover frequency

 ω = √K rad/sec.
 ω = 0 rad/sec.
 ω = K2 rad/sec.
 ω = K rad/sec.

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Control Systems
A system is stable for (where GM = Gain Margin and PM = Phase Margin):

 GM and PM both +ve.
 PM - ve.
 GM -ve.
 GM and PM both -ve.

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Control Systems
The unit impulse response of second order system is 1/6 * e-0.8t sin(0.6t). THen the natural frequency is

 1 rad/s
 2 rad/s
 0.6 rad/s
 0.8 rad/s

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Control Systems
Which system is also known as automatic control system?

 Open loop control system
 Closed loop control system
 Nether 1 nor 2
 Either 1 or 2

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