What is the operating principal of the sensing device used in an autopilot system?

What is the operating principal of the sensing device used in an autopilot system?

• A. Gyro
• B. Altimeter
• C. Magnetometer
• D. GPS

Answer: (A)

The sensing device relies on the gyroscopic principle. An autopilot stabilizes and controls the aircraft by knowing how fast it is rotating about each axis (roll, pitch, yaw). A gyroscope measures angular velocity, and the autopilot integrates those rates over time to determine the aircraft’s attitude and make the necessary surface adjustments to keep or return to stability. Modern systems use MEMS or other gyro technologies inside an inertial sensing unit, often together with accelerometers for better attitude reference. An altimeter looks at barometric pressure to determine altitude, not orientation. A magnetometer detects the Earth's magnetic field for heading but isn’t the primary means to sense aircraft rotation. GPS provides position and velocity, not real-time attitude.

The sensing device relies on the gyroscopic principle. An autopilot stabilizes and controls the aircraft by knowing how fast it is rotating about each axis (roll, pitch, yaw). A gyroscope measures angular velocity, and the autopilot integrates those rates over time to determine the aircraft’s attitude and make the necessary surface adjustments to keep or return to stability. Modern systems use MEMS or other gyro technologies inside an inertial sensing unit, often together with accelerometers for better attitude reference.

An altimeter looks at barometric pressure to determine altitude, not orientation. A magnetometer detects the Earth's magnetic field for heading but isn’t the primary means to sense aircraft rotation. GPS provides position and velocity, not real-time attitude.