Home / ECE / Automatic Control Systems :: Section 3

ECE :: Automatic Control Systems

  1. The polar plot in the given figure is for the term

  2. A.
    jωT
    B.
    1 + jωT
    C.
    D.

  3. The compensator in the given figure is a

  4. A.
    lag compensator
    B.
    lead compensator
    C.
    lag-lead compensator
    D.
    none of the above

  5. If G(s) H(s) = , the closed loop poles are on

  6. A.
    negative real axis
    B.
    jω axis
    C.
    right half plane
    D.
    either (a) or (b)

  7. For the block diagram of the given figure, the equation describing system dynamics is

  8. A.
    (1 + RCs) Δθ0(s) = Δθi(s) + R Δ H(s)
    B.
    (1 + RCs) [ΔH(s)] = Δθ(s) - Δθ0(s)
    C.
    (1 + RCs) Δθ0(s) = RΔ H(s) - Δ θi(s)
    D.
    (1 + RCs) Δθi(s) = Δ H(s)[R] - Δθ0(s)

  9. For the given figure C(s)/R(s)

  10. A.
    K
    B.
    0.5 K
    C.
    2 K
    D.
    0.25 K

  11. The polar plot of

  12. A.
    does not cross real axis
    B.
    crosses real axis
    C.
    crosses real axis at ω = 0.7 rad/sec
    D.
    crosses real axis at ω = 1.4 rad/sec

  13. In a second order undamped system, the poles are on

  14. A.
    positive real axis
    B.
    imaginary axis
    C.
    negative real axis
    D.
    either (a) or (c)

  15. For the system of the given figure, the undamped natural frequency of closed loop poles is

  16. A.
    2 rad/sec
    B.
    1 rad/sec
    C.
    0.5 rad/sec
    D.
    0.25 rad/sec

  17. An open loop system has a forward path transfer function (42.25)/s(s + 6.5). The unit step response of the system starting from rest will have its maximum value at a time equal to

  18. A.
    0 sec
    B.
    0.56 sec
    C.
    5.6 sec
    D.
    infinity

  19. In the given figure