The open loop transfer function of a system is G(s) H(s)= K / (1+s)(1+2s)(1+3s) The phase cross over frequency ωc is
A. V2
B. 1
C. Zero
D. V3
Answer:B
The open loop transfer function of a system is G(s) H(s)= K / (1+s)(1+2s)(1+3s) The phase cross over frequency ωc is
A. V2 B. 1 C. Zero D. V3
Explanation: Phase crossover frequency is calculated as by calculating the magnitude of the transfer function and equating it to 1 and the frequency calculated at this magnitude is phase cross over frequency.