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Control Systems

Control Systems
Which of the following is/are represents the lead compensator?

 (s+2)/(s+5)
 both 2 and 3
 (s+2)/(s+1)
 (s+5)/(s+6)

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Control Systems
In which of the following controller band width is increased?

 nether 1 nor 2
 proportional plus derivative controller
 both 1 and 2
 proportional plus integral controller

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Control Systems
Angle condition for complimentary root locus or inverse root locus is

 ± (2q + 1) 180°
 ± (2q) 180°
 ± (2q) 360°
 ± (2q + 1) 360°

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Control Systems
Which one of the following is the response y(t) of a casual LTI system described by H(s) = (s+1)/(s²+2s+2) for a given input x(t) = e-t u(t)?

 e-t tant*u(t)
 e-t cost*u(t)
 e-t sint*u(t)
 e-t cott*u(t)

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If gain k is increased to infinity, then damping ratio will tend to become

 zero
 unity
 0.707
 infinite

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Control Systems
A second order control system has F(jω) = 100/(100 - ω² + 10√2 jω). Find the resonant peak?

 0.707
 0.5
 1
 1.5

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