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The transfer function of a closed-loop system is
Fk(s) = K(s + 3) 1 + s – s2 + s3
. This system is—
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- stable
- unstable
- marginally stable
- conditionally stable
- stable
Correct Option: B
Given closed loop system.
| Fk(s) = | |
| 1 + s – s2 + s3 |
C.E. = 1 + s – s2 + s3 = 0
since the coefficient of s2 is negative, therefore the given system is unstable.
