Procédé et appareil de calibration des gyromètres d'un satellite stabilisé 3-axes

• Main Authors: PIERRE-YVES RENAUD, MICHEL SGHEDONI, ISSAM-MAURICE ACHKAR, PIERRE GUILLERMIN
• Format: Patent
• Language: French
• Published: 03.02.1995
• Edition: 5
• Subjects: AIRCRAFT; AVIATION; CONTROLLING; COSMONAUTICS; GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PERFORMING OPERATIONS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; REGULATING; SURVEYING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TESTING; TRANSPORTING; VEHICLES OR EQUIPMENT THEREFOR

The procedure involves receiving position and attitude information from solar sensors (1), terrestrial and stellar sensors (3A,B) and gyroscopic meters (5). After treatment (21) the data and other orbital information (22) is processed by a Kalman filter which produces command signals to nozzle actuators (6). Since position and attitude information from earth may be lost at critical moments any constant gyroscopic drift must be regularly determined. This is done by using the command system to compare in real time attitude estimates from the gyroscopes with those derived from the other sensors, storing constant amounts of gyroscopic drift.