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Control system miscellaneous

  1. The Bode magnitude plot of H(jω) =
    104 (1 + jω)
    is
    (10 + jω)(100 + jω)2



Correct Option: A

H(jω) =
104(1 + jω)
(10 + jω)(100 + jω)2

=
104 (1 + s)
10 1 +
s
(100)2 1 +
s
2
10200

=
0.1 (1 + s)
1 +
s
1 +
s
2
10200

∴ Value of K = + 20 log10 (0.1)
= – 20 db.
So plot will start from – 20 db ft.



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