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Control Systems

Control Systems
A ramp input applied to an unity feedback system results in 5% steady state error. The type number of the system is...........?

 1
 3
 2
 5

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Control Systems
Time constant is defined as the time taken by the response of the system to reach ----------- ?

 70.7% of the final value
 100% of the final value
 50% of the final value
 63% of the final value

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Control Systems
The transfer function of a plant is T(s) = 5/(s+5)(s² + 5 + 1). The second order approximation of T(s) using dominant pole concept is

 5/(s+1)(s+5)
 1/(s+1)(s+5)
 1/(s² + 5 + 1)
 5/(s² + 5 + 1)

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Control Systems
The following transfer function represents a phase-lead compensator?

 (s+4)/(s+6)
 1/s
 (s+4)/(3s+6)
 (4s+2)/(6s+1)

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Control Systems
Advantages of open loop control system is/are

 simple and economical.
All of these
 reliable.
 accurate.

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Control Systems
Find the relation of damped natural frequency (ωd)

 (ωn) √(1-2ζ²)
 (ωn) √(1-1/ζ²)
 (ωn) √(1-4ζ²)
 (ωn) √(1-ζ²)

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