MCQ Practice Question

A phase-lag compensator is commonly used mainly to improve?

ASteady-state accuracy by increasing low-frequency gain
BHigh-frequency noise amplification
CNatural frequency to infinity
DPhase lead at all frequencies

Correct Answer: A. Steady-state accuracy by increasing low-frequency gain

Explanation: Lag compensation can raise effective low-frequency loop gain relative to high-frequency gain, improving steady-state accuracy with modest transient impact.

Reference: Standard control systems: compensators