What electro-mechanical device can be used to move a control surface?

What electro-mechanical device can be used to move a control surface?

• A. Gyroscope
• B. Barometer
• C. Altimeter
• D. Servo

Answer: (D)

Moving a control surface requires an actuator that converts electrical control signals into precise mechanical motion. A servo is exactly this: an electro-mechanical device that receives a signal, uses an internal motor and gears to position the surface at the commanded angle, and provides feedback to hold or adjust that position as needed. In drones, servos (or similar electric actuators) physically drive the rudder, elevator, or ailerons. The other options are sensors rather than actuators. A gyroscope measures angular velocity or orientation; a barometer measures atmospheric pressure; an altimeter measures altitude. They supply information to help you decide how to move the surface, but they don’t physically move it.

Moving a control surface requires an actuator that converts electrical control signals into precise mechanical motion. A servo is exactly this: an electro-mechanical device that receives a signal, uses an internal motor and gears to position the surface at the commanded angle, and provides feedback to hold or adjust that position as needed. In drones, servos (or similar electric actuators) physically drive the rudder, elevator, or ailerons.

The other options are sensors rather than actuators. A gyroscope measures angular velocity or orientation; a barometer measures atmospheric pressure; an altimeter measures altitude. They supply information to help you decide how to move the surface, but they don’t physically move it.