The closed loop transfer function of a unity negative feedback system is 100/(s2+8s+100). Its open loop transfer function is:
A. 100/s+8
B. 1/s2+8s
C. 100/s2-8s
D. 100/s2+8s
Answer:D
The closed loop transfer function of a unity negative feedback system is 100/(s2+8s+100). Its open loop transfer function is:
A. 100/s+8 B. 1/s2+8s C. 100/s2-8s D. 100/s2+8s
Explanation: For unity feedback system the closed loop transfer function is: G/1+GH and the open loop transfer function can be calculated by balancing the value of G.