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Control Systems

Control Systems
Advantages of open loop control system is/are

All of these
 reliable.
 simple and economical.
 accurate.

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Control Systems
The second order system defined by 25/(s2 + 5s + 25) is given a step input. The time taken for the output to settle with in 2 % of input is

 1.6 sec.
 1.2 sec.
 0.4 sec.
 2 sec.

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Control Systems
A second order control system is defined by the following equation: 4 d²c(t)/dt² + 8 dc(t)/dt + 16 c(t) = 16 u(t) The damping ratio and natural frequency for this system are respectively

 0.50 and 2 rad/s
 0.25 and 2 rad/s
 0.50 and 4 rad/s
 0.25 and 4 rad/s

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Control Systems
Given a unity feedback system with G(s) = k/s(s+4), the value of k for damping ratio of 0.5 is

 16
 64
 1
 4

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

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

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Control Systems
A second order system has peak over shoot = 50% and period of oscillations 0.2 seconds. Find the resonant frequency?

 29.74 ra/s
 31.41 rad/s
 32.16 rad/s
 30.63 rad/s

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