What happens to the phase lag in an actuator as the frequency is increased?(a) Increases(b) Decreases(c) Constant(d) Cannot be determinedI had been asked this question by my school teacher while I was bunking the class.Origin of the question is Control Laws in FBW topic in portion Fly by Wire Flight Control of Avionics

What happens to the phase lag in an actuator as the frequency is incre

1.	What happens to the phase lag in an actuator as the frequency is increased?(a) Increases(b) Decreases(c) Constant(d) Cannot be determinedI had been asked this question by my school teacher while I was bunking the class.Origin of the question is Control Laws in FBW topic in portion Fly by Wire Flight Control of Avionics
Answer» Right choice is (a) INCREASES The best explanation: The response of the actuators at low frequencies is basically that of a low pass (or FIRST-order) filter, but as the frequency increases the lags in the first stage actuation system become dominant. The output/input ratio falls at an INCREASING RATE and the phase lag RAPIDLY increases.

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