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Control system miscellaneous

  1. A system is described by the state equation
    Ẋ = AX + BU.
    The output is given by Y = CX,
    where, A = -4
    -1
    , B = 1 , C = [ 1  0 ]
    3-11

    Transfer function G(s) of the system is
    1. s
      s2 + 5s + 7

    2. 1
      s2 + 5s + 7

    3. s
      s2 + 3s + 2

    4. 1
      s2 + 3s + 2

Correct Option: A

Transfer function G
G(s) = C(sI – A)– 1 B

(sI - A) = s
0
- -4-1 = s + 4
1
0s3-1-3s + 1


Here , G(s) =
[1   0]
s + 1
-1
1
s2 + 5s + 7+3s + 41

=
s
s2 + 5s + 7



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