A plant is controlled by a proportional controller, if time delay element is introduced in the loop its:
A. Phase margin remains the same
B. Phase margin increases
C. Phase margin decreases
D. Gain margin increases
Answer:C
A plant is controlled by a proportional controller, if time delay element is introduced in the loop its:
A. Phase margin remains the same B. Phase margin increases C. Phase margin decreases D. Gain margin increases
Explanation: When a delay element is introduces in a control system, it only affects the phase margin of the system and new value of the phase margin is decreased.