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Control Systems

Control Systems
The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no of roots in the right half of the s-plane is

 4.
 0.
 2.
 3.

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Control Systems
Which of the following represents the value of resonant frequency (ωr)?

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

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Control Systems
Consider the function F(s) = ω/(s²+ω²). Where F(s) = Laplace transform of f(t). The final value of f(t) is equal to

 a value between -1 and +1
 finite constant
 zero
 infinite

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Control Systems
The position and velocity error coefficient for the transfer function given below are respectively

 0 and infinity.
 50 and infinity.
 50 and 0.
 0 and 0.

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Control Systems
Force balancing equation of a dash-pot element is (where, x = displacement)

 B *x
 B d2x/dt2
None of these
 B dx/dt

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Control Systems
Which of the following is the analogous quantity for mass element in force-voltage analogy?

 Inductance.
All of these
 Resistance.
 Capacitance.

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