To determine roll, pitch, and yaw, which device is used?

To determine roll, pitch, and yaw, which device is used?

• A. Barometric sensor
• B. Inertial Measurement Unit (IMU)
• C. GPS receiver
• D. Camera

Answer: (B)

Determining roll, pitch, and yaw relies on sensing how the device is rotating and how gravity acts on it. An Inertial Measurement Unit does this by combining a gyroscope, which measures angular rates around all three axes, with an accelerometer that senses linear acceleration including the gravity vector. By integrating the angular rates over time and using the gravity direction from the accelerometer, the system can compute roll and pitch; yaw (heading) is refined through sensor fusion, often with a magnetometer when available. This combination provides a stable attitude estimate for flight control. The other options don’t give the full attitude data: a barometric sensor measures altitude, GPS gives position/velocity, and a camera can assist with pose estimation but is not the primary source for instantaneous orientation in standard drone control.

Determining roll, pitch, and yaw relies on sensing how the device is rotating and how gravity acts on it. An Inertial Measurement Unit does this by combining a gyroscope, which measures angular rates around all three axes, with an accelerometer that senses linear acceleration including the gravity vector. By integrating the angular rates over time and using the gravity direction from the accelerometer, the system can compute roll and pitch; yaw (heading) is refined through sensor fusion, often with a magnetometer when available. This combination provides a stable attitude estimate for flight control. The other options don’t give the full attitude data: a barometric sensor measures altitude, GPS gives position/velocity, and a camera can assist with pose estimation but is not the primary source for instantaneous orientation in standard drone control.