EC > GATE 2017 SET-2 > Stability Analysis
A unity feedback control system is characterized by the open-loop transfer function
G(s)=2(s+1)/(s3+ks2+2s+1).
The value of k for which the system oscillates at 2 rad/s is
G(s)=2(s+1)/(s3+ks2+2s+1).
The value of k for which the system oscillates at 2 rad/s is
Correct : 0.75
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