The Definition of AHRS

AHRS is called the attitude reference system and includes many multiple axial sensors, which can provide aircraft with heading, roll and rollover information. Those systems are used to provide aircraft with accurate and reliable attitude and navigation information. The attitude reference system includes MEMS-based triaxial gyros, accelerometers, and magnetometers. The difference between the attitude reference system and the inertial measurement unit is that the attitude reference system (AHRS) includes the embedded attitude data solution unit and heading information, and the inertial measurement unit (IMU) only provides sensor data and does not provide the function of accuracy and reliable gesture data. At present, the heading solution unit of multi-sensor data fusion adopted in the AHRS is a Kalman filter.

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