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Control Systems

Control Systems
Angle of asymptotes for complimentary root locus is

 (2q)*180/P
 (2q+1)*180/(P-Z)
 (2q)*180/(P-Z)
 (2q+1)*180/P

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Control Systems
The output of the system has an effect upon the input quantity, then the system is a

 closed loop control system.
 open loop control system.
 either 1 or 2.
None of these

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

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Control Systems
At which frequency does the Bode magnitude plots for the functions K/S2 have gain crossover frequency

 ω = K rad/sec.
 ω = √K rad/sec.
 ω = 0 rad/sec.
 ω = K2 rad/sec.

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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
 0.707
 infinite
 unity

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Control Systems
The characteristic equation of a feedback control system is given by s³ + 5s² + (k + 6)s + k = 0. In the root loci diagram, the asymptotes of the root loci for large 'k' meet at a point in the s-plane whose coordinates are

 (-2,0)
 (-1,0)
 (2,0)
 (1,0)

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