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Control Systems

Control Systems
In the cauer-2 form of LC network---------is series element and --------is shunt element respectively?

 C and L
 C and C
 L and L
 L and C

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Control Systems
The transfer function of phase lead compensator is given by , where, T > 0, α < 0. What is the maximum phase shift provided by this compensator?

 tan-1((1 - α)/(2√α)
 sin-1((1 - α)/(1 + α)
 both 1 and 3
 cos-1((1 - α)/(1 + α)

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Control Systems
The system is initially critical damped. If the gain of the system is doubled, then it will exhibit

 critical damped characteristics.
 undamped characteristics.
 under damped characteristics.
 over damped characteristics.

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Control Systems
The closed loop transfer function of a unity feedback control system is 9/(s² + 3s + 9), then the type of the system is

 3
 2
 1
 0

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Control Systems
The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its closed loop transfer function is

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

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Control Systems
A proportional plus integral controller

 increases the stability of the system
 it increases rise time
 both 2 and 3
 has high sensitivity

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