TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

CVGs [Coriolis vibrating gyroscope] have three features in common : a mechanical resonator, an oscillator and a force-displacement sensor. One mode of the resonator is maintained in resonance by an oscillator loop while oscillations are induced in a second vibration mode. The amplitude of the oscillations gives a signal proportional to the input angular rate. A wide variety of resonators, actuation and sensing schemes are possible. The simplest resonator is a tuning fork.  2, record 1, English, - mechanical%20resonator

Record number: 1, Textual support number: 2 CONT

... the following characteristics can be those of a rate gyro designed to measure a rate of turn up to 100 DEG per second. The mechanical resonator comprises four beams each having a cross-section of 6 mm by 6 mm, and each 30-35 mm long. The piezo-electric elements are constituted by pellets of PZT having a thickness of a few tenths of a millimeter, metal-coated on both faces, and bonded to the beams.  3, record 1, English, - mechanical%20resonator

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

En gyroscopie mécanique [...] on sait que le plan d'oscillation d'un pendule (on parlera plus loin d'un résonateur mécanique), ou l'axe d'une toupie en rotation rapide ont la propriété de conserver une direction fixe dans l'espace inertiel. [...] Mais, l'inertialité parfaite du pendule de Foucault est liée à la simplicité du résonateur et aux particularités de sa mise en œuvre. Aussi, dans les résonateurs mécaniques utilisés pour la fabrication des gyroscopes, la vibration mécanique est partiellement entraînée lors de la rotation du support mécanique.  1, record 1, French, - r%C3%A9sonateur%20m%C3%A9canique

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A device which makes use of a planet’s magnetic field to stabilise a satellite.  4, record 2, English, - magnetotorquer

Record number: 2, Textual support number: 1 CONT

The angular momentum of a tumbling orbiting satellite is changed to reduce the spinning of the spacecraft such that the spacecraft can operate in an essentially stabilized condition. The change in spin rate is accomplished by the development of a magnetic torque by commutation of magnetic air coils in response to Earth sensor signals controlled by spacecraft logic. The coils are disposed to produce magnetic dipoles transverse to the satellite spin axis such that by interacting with the Earth's magnetic field a torque is developed in a direction opposite the spin vector. The logic selects the proper magnetic dipole based upon data from sensors detecting the presence of the Earth for the development of the desired magnetic torque.  5, record 2, English, - magnetotorquer

Record number: 2, Textual support number: 1 OBS

magnetotorquer: term officially approved by the RADARSAT-2 Terminology Approval Group (ROAG).  6, record 2, English, - magnetotorquer

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Dispositif qui utilise le champ magnétique d'une planète pour stabiliser un satellite.  2, record 2, French, - g%C3%A9n%C3%A9rateur%20de%20couple%20magn%C3%A9tique

Record number: 2, Textual support number: 1 OBS

générateur de couple magnétique : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  2, record 2, French, - g%C3%A9n%C3%A9rateur%20de%20couple%20magn%C3%A9tique

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Stabilisation. This stage will start automatically upon detection of the spacecraft separation from the launch vehicle. Spacecraft initialisation consists of switching on sensors : GPS, Magnetometer, Gyro and Sun Sensor. At launcher release, the spacecraft will autonomously recognise its angular rate, damp it and acquire controlled attitude. Upon success of de-spin and first sun acquisition, RADARSAT-2 will start to acquire a coarse stable 3-axes attitude. This process should take 2-3 orbits.  2, record 3, English, - stabilisation

Record number: 3, Textual support number: 1 OBS

stabilisation: term officially approved by the RADARSAT-2 TerminologyApproval Group (RTAG).  3, record 3, English, - stabilisation

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Stabilisation. Cette étape débutera automatiquement lors de la détection de la séparation du satellite et du véhicule de lancement. L'initialisation du satellite consiste à allumer les capteurs tels le GPS, le magnétomètre, le gyro et le capteur solaire. Lors de la séparation, le satellite reconnaîtra automatiquement sa vitesse angulaire et l'amortira pour atteindre ensuite une attitude contrôlée. À la suite de l'arrêt de rotation et de la première acquisition solaire, RADARSAT-2 débutera l'acquisition d'une attitude stable sur trois axes. L'ensemble du processus devrait durer environ de 2 à 3 orbites.  2, record 3, French, - stabilisation

Record number: 3, Textual support number: 1 OBS

stabilisation : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  2, record 3, French, - stabilisation

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A sensor that measures rotational velocity around its sensitive axis; measured in degrees per second.  2, record 4, English, - angular%20rate%20sensor

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Principe d'une centrale inertielle [...] Mesure de la rotation [...] La plateforme [...] étant stabilisée en permanence, des capteurs angulaires (potentiomètres [...]) et des capteurs de vitesse angulaire (génératrices tachymétriques [...]), disposés sur les articulations des armatures de Cardan [...] mesurent en continu les angles d'orientation [psi, thêta, phi] et leur vitesse angulaire. Nous confirmons ainsi la possibilité de mesurer notamment le vecteur rotation absolu du véhicule dans un repère galiléen. Une des affirmations du principe d'Einstein-Galilée est donc vérifiée.  3, record 4, French, - capteur%20de%20vitesse%20angulaire

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

Rate gyroscopes provide a means for measuring angular rate about a particular axis and are traditionally used in a variety of high accuracy control and guidance systems in aircraft, missiles and ships. The conventional rate gyro, based on a high speed rotor, is a mature but relatively complex, delicate and expensive product. For these reasons and the increasing market for less expensive devices, a great deal of research effort has been invested into the development of a rate gyro with a vibrating sensitive element, which would eliminate the need for ball bearing suspensions and hence reduce the mechanical complexity and cost whilst greatly increasing life and robustness. The principle of operation of these devices is based on the coriolis force, which couples together two degenerate modes of vibration of the sensitive element when the sensor rotates.  1, record 5, English, - conventional%20rate%20gyro

Record number: 5, Textual support number: 1 OBS

rate gyro: A special kind of gyroscope that measures rotation rate around a fixed axis.  3, record 5, English, - conventional%20rate%20gyro

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 CONT

Les erreurs de mesure des gyromètres laser peuvent être représentées par des modèles mathématiques beaucoup plus simples que ceux intervenant dans l'étude des gyromètres classiques. Cela résulte essentiellement de l'insensibilité des gyromètres laser aux accélérations.  1, record 5, French, - gyrom%C3%A8tre%20classique

Record number: 5, Textual support number: 1 OBS

gyromètre : Capteur gyroscopique à un ou plusieurs degrés de liberté, utilisé pour la mesure de vitesses angulaires.  2, record 5, French, - gyrom%C3%A8tre%20classique

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 OBS

The Autopilot system consists of the following components :(...)-One three-axis angular rate sensor(...)  1, record 6, English, - three%2Daxis%20angular%20rate%20sensor

Record number: 6, Textual support number: 2 OBS

The complete source code is MECAR-SE-210E, 1970,1,22-01-0,2  2, record 6, English, - three%2Daxis%20angular%20rate%20sensor

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 OBS

L'ensemble du pilote automatique est composé des éléments suivants: (...) -1 détecteur de vitesse angulaire 3 axes (...)  1, record 6, French, - d%C3%A9tecteur%20de%20vitesses%20angulaires%20sur%203%20axes

Record number: 6, Textual support number: 2 OBS

Le code de source complet est MECAR-SE-210F,1972,1,22-01-0,2  2, record 6, French, - d%C3%A9tecteur%20de%20vitesses%20angulaires%20sur%203%20axes

Record 6,  Textual support,  Spanish