Question

Question 13 10 poi Given the open loop gan Bode plot diagram of a system, Chose the best sentonce that describes the closed loop system Bode Diagram 50 45 35 30 25 20 15 45 30 15 0 -15 -30 45. -60 75 -105 -120 -135 10 10 10 Frequency (radsec) O The system is stable O The system is unstable only because the gain is greater than 0 when the phase is-180 O The system is unstable only because the phase is less than-180 when the gain is 0 O The system is unstable because the phase is less than-180 when the gain is 0, and the gain is greater than 0 when the phase is -180 DELL apraubep (0ap) aseud

Answer 1

"The system is stable the system is unstable because the phase is less than - 180 when the gain is 0 and the gain is greater than 0 when the phase is - 180 0.5 rad/sec 1 rad/sec 40 dB 30 rad/sec 0.5 rad/sec Note: Rightarrow the frequency at which magnitude 0 dB in magnitude plot is called ""gain cross over frequency"" Rightarrow the frequency at which the phase angle is - 180 degree in phase plot is called "" phase cross over frequency"" "