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Control Systems

Control Systems
The optimum values of damping ratio is --------------

 0.3 to 5
 0.9 to 1.1
 0.3 to 0.7
 0 to 2

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Control Systems
Which of the following combinations is/are correct electrical analogous elements in force-current analogy?

 Spring element (K) --------- Inverse inductance (1/L)
All of these
 Force (f) --------------------- Current (i)
 Velocity (v) ----------------- Voltage (V)

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Control Systems
Consider a point S = -3 + j4 in the s-plane. Then for a system with the open loop transfer function ?

 either 1 or 2
None of these
 S is on root locus
 S is not on root locus

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

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

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Control Systems
Which of the following controller is also known as anticipatory controller?

 proportional controller
 derivative controller
 integral controller
 both 1 and 3

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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 the gain k is increased to infinity, then damping ratio will tend to become

 infinite
 0.707
 zero
 unity

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