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| AHRS× | Attitude quaternion× | |
|---|---|---|
| Domaine | Aérospatiale | Aérospatiale |
| Famille | Process / pipeline | Process / pipeline |
| Année d'origine≠ | 1940s | 1843 |
| Auteur d'origine≠ | Aviation heritage | William Hamilton (quaternions), aerospace engineers |
| Type≠ | System | Mathematical framework |
| Source fondatrice≠ | Savage, P. G. (2007). Strapdown Inertial Integration Technology (2nd ed.). Strapdown Associates. link ↗ | Shuster, M. D. (1993). A survey of attitude representations. Journal of the Astronautical Sciences, 41(4), 439–517. link ↗ |
| Alias | AHRS system, attitude reference, heading sensor | quaternion representation, attitude kinematics, q-vector |
| Apparentées | 3 | 3 |
| Résumé≠ | An Attitude Heading Reference System (AHRS) is a complete inertial navigation subsystem that estimates and outputs the three-dimensional orientation (attitude) and heading of a vehicle or platform. AHRS combines measurements from accelerometers, gyroscopes, and often magnetometers through sensor fusion algorithms (typically Kalman filters or complementary filters) to provide a drift-free, fast attitude estimate. AHRS is standard in aviation, marine navigation, and modern autonomous systems. | Quaternion attitude representation is a mathematical framework for describing three-dimensional rotations using four-dimensional vectors (quaternions). Superior to Euler angles due to the absence of singularities (gimbal lock), quaternions are the standard representation in modern attitude estimation, spacecraft control, and 3D computer graphics. Quaternion kinematics elegantly expresses how attitude evolves under angular velocity measurements from gyroscopes. |
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