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ECE :: Automatic Control Systems

Automatic Control Systems - Section 1
Automatic Control Systems - Section 2
Automatic Control Systems - Section 3
Automatic Control Systems - Section 4
Automatic Control Systems - Section 5
Automatic Control Systems - Section 6
Automatic Control Systems - Section 7
Automatic Control Systems - Section 8
Automatic Control Systems - Section 9
Automatic Control Systems - Section 10
Automatic Control Systems - section-11

  1. Which dc servomotor requires strongest permanent magnet?

    2. A.
    Slotted armature
    B.
    Surface wound armature
    C.
    Surface wound with stationary rotor
    D.
    Either (a) or (b)

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  2. Nichols chart consists of

    3. A.
    constant magnitude loci
    B.
    constant phase angle loci
    C.
    magnitude and phase angle loci in log-magnitude versus phase diagram
    D.
    none of the above

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  3. Consider the following statements about root locus

    1. The intersection of root locus branches with the imaginary axis can be determined by the use of Routh criterion
    2. Segments of real axis having an odd number of real axis open loop poles plus zeros to their right are not parts of root locus
    3. The number of root locus branches terminating on infinity is always zero
    Which of the above statements are correct?

    4. A.
    1, 2 and 3
    B.
    1 and 2 only
    C.
    1 only
    D.
    2 and 3 only

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  4. Assertion (A): If f(t) = 1 - e-t,

    Reason (R):

    5. A.
    Both A and R are correct and R is correct explanation of A
    B.
    Both A and R are correct but R is not correct explanation of A
    C.
    A is correct but R is wrong
    D.
    R is correct but A is wrong

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  5. The system of the given figure

    6. A.
    is unstable for all values of K
    B.
    is stable for all values of K
    C.
    can be stable for some values of K
    D.
    data is insufficient to determine stability

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  6. The poles with greater displacement from the real axis correspond to

    7. A.
    higher frequencies of oscillations
    B.
    stable response
    C.
    lower frequencies of oscillations
    D.
    unbounded output

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  7. For a feedback system

    Then the velocity error constant Kv is given by

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  8. Which of the following is open loop system?

    9. A.
    Wind screen wiper
    B.
    Aqualing
    C.
    Respiratory system of animal
    D.
    System for controlling antirocket missiles

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