The open loop control transfer function of a unity feedback system is given by : G(s) =K/(s+2)(s+4)(s^2+6s+25) Which is the value of K which causes sustained oscillations in the closed loop system?
A. 590
B. 790
C. 990
D. 1190
Answer:A
The open loop control transfer function of a unity feedback system is given by : G(s) =K/(s+2)(s+4)(s^2+6s+25) Which is the value of K which causes sustained oscillations in the closed loop system?
A. 590 B. 790 C. 990 D. 1190
Explanation: The value of the sustained oscillations is calculated from the Rout-Hurwitz table by equation the quadratic equation=0.