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Control Systems

Control Systems
The characteristic equation has the following roots for over damped stable system?

 -2,-4
 -2,2
 -2±j4
 -2,-2

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Control Systems
The transfer function of a system is given as below, if a = 0.1, then the steady state error to unity ramp input will be

 0.49.
 0.16.
 0.35.
 0.25.

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Control Systems
In frequency response analysis of second order system, the error at corner frequency is

 -10 logξ
 -20 log2ξ
 20 log2ξ
 10 logξ

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Control Systems
Resonant peak of a marginally stable system is

 finite value
 any of the above
 0
 infinite

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Control Systems
The input-output relationship of a linear time invariant continuous time system is given by r(t) = d²c(t)/dt² + 3 dc(t)/dt + 2 c(t) Where r(t) and c(t) are input and output respectively. What is the transfer function of the system equal to?

 2/(s² + s + 2)
 1/(s² + 3s + 2)
 1/(s² + s + 2)
 2/(s² + 3s + 2)

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

 2
 3
 0
 1

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