TERMIUM Plus^®

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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, fiche 1, Anglais, - mechanical%20resonator

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... 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, fiche 1, Anglais, - mechanical%20resonator

Fiche 1,  Justifications,  Français

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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, fiche 1, Français, - r%C3%A9sonateur%20m%C3%A9canique

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Fiche 2,  Justifications,  Anglais

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A vibration of large amplitude resulting from a forced or a semi-induced vibration to a mass in contact with, or resulting upon, the ground.  2, fiche 2, Anglais, - ground%20resonance

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The helicopter pilot will recognize ground resonance from the rocking motion of the fuselage.  2, fiche 2, Anglais, - ground%20resonance

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ground resonance: term officially approved by the Aeronautical Terminology Standardization Committee (ATSC) - Helicopters.  3, fiche 2, Anglais, - ground%20resonance

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résonance au sol : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Hélicoptères.  3, fiche 2, Français, - r%C3%A9sonance%20au%20sol

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Fiche 3,  Justifications,  Anglais

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Laser force microscope senses topography by moving a tungsten or silicon probe across a sample(typically a microelectronic component) at a height of a few nanometers. The tip is set vibrating at close to its resonance frequency. Attractive forces... called van der Waals attractions and the surface tension of water that condenses between tip and sample, pull on the tip, changing its resonance frequency and so reducing its vibration amplitude. The variation in the forces, and hence in tip travel, reveals surface relief. A laser probe tracks the tip by means of a beam that is split into two. One of the beams is reflected through a stationary prism; the other passes through a Bragg cell--a device that shifts the beam's frequency--and is reflected from the back of the probe. The beams are recombined, and their interference produces a signal(at the Bragg-cell frequency) that measures the tip vibration.  1, fiche 3, Anglais, - laser%20force%20microscope

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Scanning laser force microscope.  2, fiche 3, Anglais, - laser%20force%20microscope

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Term(s) taken from a Canadian laboratory-equipment company’s catalogue.  1, fiche 4, Anglais, - vibration%20amplitude

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Terme(s) tiré(s) du catalogue d'une compagnie canadienne d'équipement de laboratoire.  1, fiche 4, Français, - amplitude%20de%20la%20course%20d%27agitation

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Fiche 5,  Justifications,  Anglais

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... the magnetic-force microscope(MFM), enables us to look at the actual performance of such heads-the definition, uniformity and strength of the magnetic field they produce. In place of the tungsten or silicon needle, the MFM has a magnetized nickel on probe. When the vibrating probe is brought near a magnetic sample, the tip feels a force that changes its resonance frequency and hence its vibration amplitude. The MFM can trace the magnetic-field pattern emanating from data-recording heads at a resolution of better than 25 nanometers. The device can also study the structure of the magnetic bits that store data on disks and other media, giving insight into both head performance and the quality of the storage medium.  3, fiche 5, Anglais, - magnetic%2Dforce%20microscope

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[…] hay varios tipos de SPM [microscopios de exploración de sonda], entre ellos, se encuentra [el] microscopio de fuerza atómica (AFM), el microscopio de efecto de túnel (STM), el microscopio de fuerza magnética (MFM), el microscopio de fuerza de resonancia magnética (MRFM), […]  3, fiche 5, Espagnol, - microscopio%20de%20fuerza%20magn%C3%A9tica

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En el caso de un microscopio de fuerzas magnéticas (MFM) una punta magnética rastrea la superficie de la muestra magnética interaccionando con el campo de dispersión de ésta […]  4, fiche 5, Espagnol, - microscopio%20de%20fuerza%20magn%C3%A9tica

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A device that reduces the amplitude of the vibration disturbance... It may also serve to reduce the communication of vibration energy from the vibrator to its surroundings and thus in a sense isolate it.  6, fiche 6, Anglais, - vibration%20damper

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vibration damper; vibration absorber: terms officialized by the Aeronautical Terms Standardization Committee (ATSC) - Helicopters.  7, fiche 6, Anglais, - vibration%20damper

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amortisseur : Dispositif servant à amortir le mouvement provoqué par un choc ou par une vibration.  2, fiche 6, Français, - amortisseur%20de%20vibrations

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amortisseur de vibrations : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Hélicoptères; accepté par le Comité d'étude de la terminologie des cartes de travail du DC-9.  3, fiche 6, Français, - amortisseur%20de%20vibrations

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A mode in which the vibration amplitude of the pickoff is nulled by a signal whose amplitude is proportional to the rotation rate about the input axis.  1, fiche 7, Anglais, - force%2Drebalance%20mode

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Integrated Cantilever Beam Tunneling Sensor. Our researchers have exploited the extremely sensitive quantum tunneling effect between metals to design MEMS sensors that can sense a force applied to a silicon-based, surface micromachined structure with extraordinary sensitivity and six orders of magnitude of dynamic range. The force is applied to a micromachined cantilever (one electrode) and is sensed as a result of a tunneling current produced between the cantilever and a tunneling tip (the other electrode). The sensor is operated in a force rebalance mode such that the cantilever and tip do not actually move with respect to each other but are held in a servo-locked state with the voltage required to maintain the servo-lock proportional to the force being sensed by the cantilever.  2, fiche 7, Anglais, - force%2Drebalance%20mode

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Several different types of sensor devices have been designed, fabricated and demonstrated using this concept. These include extremely high dynamic range accelerometers, and high performance microgyroscopes that show the prospect of enabling very compact, inexpensive, precision inertial navigation and inertial measurement systems.  2, fiche 7, Anglais, - force%2Drebalance%20mode

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[Of a gyro] The ratio of the change in output due to angular vibration about a sensor axis divided by the amplitude of the angular vibration causing it.  1, fiche 8, Anglais, - angular%20vibration%20sensitivity

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Influence des vibrations angulaires de l'axe de rotation.  2, fiche 8, Français, - sensibilit%C3%A9%20aux%20vibrations%20angulaires

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Fiche 9,  Justifications,  Anglais

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Of an oscillatory or vibratory system : the marked increase in the amplitude of oscillation or vibration when the system is subjected to an impressed frequency that is the same as(or very close to) the natural frequency of the system.  2, fiche 9, Anglais, - resonance

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Resonance occurs in acoustical, mechanical, atomic, electrical, magnetic, optical, and radio systems, for example; and the term has also been extended to cover, by analogy, certain chemical and nuclear phenomena.  2, fiche 9, Anglais, - resonance

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De façon générale, accroissement de l'amplitude d'un phénomène de vibration lorsque la période devient égale à la période propre de vibration du système. Résonance acoustique, résonance optique, résonance magnétique.  2, fiche 9, Français, - r%C3%A9sonance

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Les phénomènes de résonance se rencontrent dans les diverses branches de la physique: en physique nucléaire, en électronique, en optique, en acoustique, en mécanique.  3, fiche 9, Français, - r%C3%A9sonance

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Cualidad de un sistema mecánico, [acústico] o eléctrico que se caracteriza por la vibración de gran amplitud provocada por un estímulo periódico relativamente pequeño cuya frecuencia es la misma, o muy parecida, que la frecuencia propia del sistema.  1, fiche 9, Espagnol, - resonancia

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A... line... where the vibration amplitude is at its maximum.  2, fiche 11, Anglais, - antinodal%20line

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[...] ligne [...] où, dans un système d'ondes stationnaires, une grandeur caractéristique spécifiée a une amplitude maximale.  2, fiche 11, Français, - ligne%20ventrale

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Procedure for balancing flexible rotors in which unbalance corrections are made to reduce the amplitude of vibration in the separate significant principal flexural modes to within specified limits.  1, fiche 12, Anglais, - modal%20balancing

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Opération d'équilibrage des rotors flexibles au cours de laquelle sont effectuées des corrections de balourd en vue de réduire les amplitudes de vibrations des différents modes principaux de flexion à des valeurs inférieures aux limites spécifiées.  1, fiche 12, Français, - %C3%A9quilibrage%20modal

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A vibration machine in which the vibration table is forced, by a positive linkage, to undergo a displacement amplitude of vibration that remains essentially constant regardless of the load or frequency of operation.  1, fiche 13, Anglais, - mechanical%20direct%2Ddrive%20vibration%20generator

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Machine à vibrations dont la table vibrante, par un accouplement direct, engendre un déplacement vibratoire d'amplitude sensiblement constante en fonction de la charge ou de la fréquence de fonctionnement.  1, fiche 13, Français, - g%C3%A9n%C3%A9rateur%20de%20vibrations%20%C3%A0%20action%20m%C3%A9canique%20directe

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Random vibration having its frequency components within a narrow band only.  1, fiche 14, Anglais, - narrow%2Dband%20random%20vibration

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The waveform of a narrow-band random vibration has the appearance of sine wave the amplitude and phase of which vary in a unpredictable manner.  1, fiche 14, Anglais, - narrow%2Dband%20random%20vibration

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Vibration aléatoire dont le spectre de fréquences n'intéresse qu'une bande étroite.  1, fiche 14, Français, - vibration%20al%C3%A9atoire%20en%20bande%20%C3%A9troite

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La forme d'onde d'une vibration aléatoire en bande étroite ressemble à une vibration sinusoïdale dont l'amplitude et la phase varient de façon imprévisible.  1, fiche 14, Français, - vibration%20al%C3%A9atoire%20en%20bande%20%C3%A9troite

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A quasi-sinusoidal vibration has the appearance of a sinusoid, but varies relatively slowly in frequency and/or in amplitude.  1, fiche 15, Anglais, - quasi%2Dsinusoidal%20vibration

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Une vibration quasi sinusoïdale à l'apparence d'une sinusoïde, mais varie relativement lentement en fréquence et/ou en amplitude.  1, fiche 15, Français, - vibration%20quasi%20sinuso%C3%AFdale

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Fiche 16,  Justifications,  Anglais

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The non-dimensional ratio of the response amplitude of a system in steady-state forced vibration to the excitation amplitude. The ratio may be one of forces, displacements, velocities or accelerations.  1, fiche 16, Anglais, - transmissibility

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Rapport sans dimension du module de la réponse d'un système en régime stabilisé de vibration forcée au module d'excitation. Ce peut être un rapport de forces, de déplacements, de vitesses ou d'accélérations.  1, fiche 16, Français, - facteur%20de%20transmission

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Vibratory feeders. Vibrating-feed systems are used on free-flowing and relatively nonfree-flowing products to achieve controlled feed rates.... Fill volumes can be varied by changing the flow rate to the vibrator, time of feed, frequency, amplitude of vibration, or pitch angle of the vibrator tray. Vibrators are sometimes equipped with shut-off gates....  1, fiche 17, Anglais, - timed%20filler

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La doseuse temporisée ZD (...) Le principe consiste à répartir le produit dans un bol et un couloir vibrants. C'est le temps d'ouverture du clapet ainsi que la hauteur de la couche qui déterminent la dose. Cadence, poids et volume sont fonction des produits.  1, fiche 17, Français, - doseuse%20temporis%C3%A9e

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A vibrograph which records curves of greater amplitude than the actual vibration, and with a specified ratio to them.  1, fiche 18, Anglais, - amplifying%20vibrograph

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Random variations in observed amplitude, location, and Doppler of a target, caused by changes in target aspect angle, rotation or vibration of target scattering sources, or changes in radar wavelength.  2, fiche 19, Anglais, - target%20noise

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bureau veritas S.V.18 p. 85 5-75  1, fiche 20, Anglais, - transient%20amplitude%20of%20vibration

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