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Control systems miscellaneous

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Control systems miscellaneous
  1. G (s) =
    1
    s(1 + 6s)

    the system is—
    1. stable
    2. unstable
    3. marginally stable
    4. conditionally stable
Correct Option: C

The poles at the origin, the phase angle may extend upto – 180º, limits the stability. Hence the system is marginally stable.


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