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| Contrôleur B-Dot× | AHRS× | |
|---|---|---|
| Domaine | Aérospatiale | Aérospatiale |
| Famille | Process / pipeline | Process / pipeline |
| Année d'origine≠ | 1980s | 1940s |
| Auteur d'origine≠ | Spacecraft attitude control engineers | Aviation heritage |
| Type≠ | Control law | System |
| Source fondatrice≠ | Wertz, J. R. (Ed.). (2002). Spacecraft Attitude Determination and Control. Kluwer Academic. link ↗ | Savage, P. G. (2007). Strapdown Inertial Integration Technology (2nd ed.). Strapdown Associates. link ↗ |
| Alias | B-dot control, magnetic damping, momentum dumping | AHRS system, attitude reference, heading sensor |
| Apparentées | 3 | 3 |
| Résumé≠ | The B-Dot controller (magnetic B-dot control law) is a simple, robust spacecraft attitude control method that uses the rate of change of Earth's magnetic field measured onboard to generate a magnetic dipole moment. Developed in the 1980s, the B-Dot law damps spacecraft angular momentum without requiring a complex attitude estimate or external reference, making it ideal for initial momentum dumping after launch or in contingency scenarios. B-Dot is passive, simple to implement, and effective. | 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. |
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