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Control Systems

Control Systems
The following transfer function represents a phase-lead compensator?

 1/s
 (s+4)/(3s+6)
 (s+4)/(s+6)
 (4s+2)/(6s+1)

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Control Systems
The characteristic equation for closed loop system is given as . The value of k for which the system becomes just stable is

 8
 4
 6
 2

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Control Systems
Which of the following is/are the example of actuator?

 Pneumatic motor
 All
 Electric motor
 Hydraulic motor

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Control Systems
Force balancing equation for elastic element (K) is (where, x = displacement)

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

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Control Systems
Certain control system has input u(t) and output c(t). If the input is first passed through a block having transfer function e-s and unit gain is applied to the applied to the system. The modified output will be

 c(t).u(t-1)
 c(t-1).u(t)
 c(t-1).u(t-1)
 c(t)u(t)

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Control Systems
For a second order under damped system subjected to unit step input the time response has first peak value to be 4 times the second over shoot. Determine the damping ratio ξ ?

 0.707
 0.07
 0.87
 0.087

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