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Control Systems

Control Systems
The impulse response of the system described by the differential equation will be

 e6t.
 e-3t u(t).
 (1/3) × (1-e-3t).
 1/3.

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Control Systems
When the polynomial is Routh Hurwitz,

 none of these.
 the roots of function have real parts which are to be zero/negative.
 the function is not real.
 all zeroes lie in the right half of the s-plane.

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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

 4/13
 13/4
 4/9
 9/4

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Control Systems
The closed loop transfer function of a system is 25/(s² + 25). The settling time of the system is

 ∞ sec
 1 sec
 25 sec
 5 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.
 GM -ve.
 PM - ve.
 GM and PM both +ve.

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

 1.18.
 0.9.
 0.707.
 1.414.

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