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The Government of Canada’s terminology and linguistic data bank.
RAIDEUR GYROSCOPIQUE [9 records]
Record 1 - internal organization data 2002-07-16
Record 1, English
Record 1, Subject field(s)
- Flight Instruments and Equipment (Aeroindustry)
- Aircraft Piloting and Navigation
- Navigation Instruments
Record 1, Main entry term, English
- erecting mechanism
1, record 1, English, erecting%20mechanism
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
In a skidding turn, the gyro precesses towards the inside of the turn. After return on the aircraft to straight and level flight, the instrument shows a turn in the direction of the skid. In a normal turn, the gyro precesses towards the inside of the turn. The precession error is quickly corrected by the erecting mechanism. 2, record 1, English, - erecting%20mechanism
Record number: 1, Textual support number: 2 CONT
The only really tricky part of the attitude indicator is its erecting mechanism. When power (vacuum) is first applied to the instrument, the mechanism quickly erects the gyro spindle to plumb-vertical in order to align the artificial horizon with the natural horizon. In flight, the erecting mechanism continually compensates the gyro for precession errors in order to keep it aligned throughout the course of a long flight. The design of the erecting mechanism is quite clever. In an air-driven attitude gyro, there are "pendulous vanes" suspended from pivots attached to the lower portion of the sealed gyro housing, one vane for each exhaust port. The vanes are positioned so that, when the gyro is erect, each vane half-covers its associated exhaust port. If the gyro tilts so that its axle is not plumb, the pendulous vanes shift so that one exhaust port is more-than-half-covered and the opposite exhaust port is less-than-half-covered. The resulting imbalance of discharge air exerts a force on the rotor housing at right angles to the direction of tilt, causing the gyro to precess to the erect position. As soon as the gyro is erect, the pendulous vanes return to a balanced condition to remove the precessing force. Pure magic! The erecting mechanism can erect the gyro quite quickly at initial power-up because the gyro doesn't exhibit much gyroscopic rigidity at low rotor RPMs. Typically, the horizon bar becomes level within the first 10 or 15 seconds, and then its oscillations (caused by precessional nutation of the gyro) are damped out within a minute or so as the rotor comes up-to-speed. 3, record 1, English, - erecting%20mechanism
Record 1, Key term(s)
- gyroscope erecting mechanism
- gyro erecting mechanism
- erection mechanism
Record 1, French
Record 1, Domaine(s)
- Instruments et équipement de bord (Constructions aéronautiques)
- Pilotage et navigation aérienne
- Instruments de navigation
Record 1, Main entry term, French
- mécanisme de redressement
1, record 1, French, m%C3%A9canisme%20de%20redressement
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- mécanisme d’érection 2, record 1, French, m%C3%A9canisme%20d%26rsquo%3B%C3%A9rection
correct, masculine noun
- système érecteur 3, record 1, French, syst%C3%A8me%20%C3%A9recteur
correct, masculine noun
- système d’érection 4, record 1, French, syst%C3%A8me%20d%26rsquo%3B%C3%A9rection
correct, masculine noun
- asservissement de verticale 5, record 1, French, asservissement%20de%20verticale
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Dans un virage dérapé, le gyroscope «précesse» du côté du virage. Une fois l’avion revenu au vol rectiligne en palier, l’instrument indique un virage dans la direction du dérapage. Dans un virage normal, le gyroscope «précesse» du côté du virage. Le mécanisme de redressement du gyroscope corrige rapidement l’erreur de précession. 1, record 1, French, - m%C3%A9canisme%20de%20redressement
Record number: 1, Textual support number: 2 CONT
Description d’un Épervier [drone] [...] d. Le gyroscope vertical: Dans ce cas, les deux axes, ROLL et PITCH sont terminés par les potentiomètres qui détectent les écarts de positions angulaires du corps par rapport aux horizons roll et pitch. Les mécanismes d’érection ne sont prévus que pour maintenir la verticalité parfaite de la masse en rotation. 6, record 1, French, - m%C3%A9canisme%20de%20redressement
Record number: 1, Textual support number: 1 OBS
Horizon gyroscopique [...] La verticalité de l'axe de toupie [delta] est approximativement assurée par un érecteur(mécanique, électro-mécanique, pneumatique) produisant une raideur en quadrature de signe convenable. 7, record 1, French, - m%C3%A9canisme%20de%20redressement
Record 1, Key term(s)
- mécanisme de redressement du gyroscope
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2002-07-05
Record 2, English
Record 2, Subject field(s)
- General Mechanics (Physics)
- Aircraft Piloting and Navigation
- Navigation Instruments
- Flight Instruments and Equipment (Aeroindustry)
Record 2, Main entry term, English
- gyroscopic stiffness
1, record 2, English, gyroscopic%20stiffness
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
Control Moment Gyros (CMGs) are torque-generating mechanisms that incorporate a single- or double-gimbaled spinning wheels. By rotating the gimbal axes, significant torques can be generated using the property of spinning bodies called gyroscopic stiffness. CMGs are often used for spacecraft attitude control, producing torques about all three of the spacecraft's orthogonal axes. 2, record 2, English, - gyroscopic%20stiffness
Record number: 2, Textual support number: 2 CONT
... although gyroscopic matrices are nonlinear, they can be written as constant matrices because of the conservation of mass and the fact that the convective components of transport velocity are constants. Therefore there is no need to update the gyroscopic inertia and gyroscopic stiffness matrix during an analysis. 3, record 2, English, - gyroscopic%20stiffness
Record 2, French
Record 2, Domaine(s)
- Mécanique générale (Physique)
- Pilotage et navigation aérienne
- Instruments de navigation
- Instruments et équipement de bord (Constructions aéronautiques)
Record 2, Main entry term, French
- raideur gyroscopique
1, record 2, French, raideur%20gyroscopique
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- phénomène dit de raideur gyroscopique 2, record 2, French, ph%C3%A9nom%C3%A8ne%20dit%20de%20raideur%20gyroscopique
masculine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
Gyroscopie [...] On peut [...] rappeler qu'en particulier si la rotation axiale se fait autour du grand axe d’inertie, l'orientation de cet axe reste fixe dans un repère inertiel. De plus dans le cas d’une grande vitesse de rotation axiale, le mouvement présente alors une très grande stabilité, appelée raideur gyroscopique, qui se manifeste par des mouvements très lents de l'axe du gyroscope, donc des vitesses angulaires très faibles et donc des accélérations angulaires encore plus faibles. 3, record 2, French, - raideur%20gyroscopique
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2002-04-17
Record 3, English
Record 3, Subject field(s)
- Flight Instruments and Equipment (Aeroindustry)
- Aircraft Piloting and Navigation
- Navigation Instruments
Record 3, Main entry term, English
- autoerection
1, record 3, English, autoerection
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
The process by which gimbal axis friction causes the spin axis of a free gyro to tend to align with the axis about which the case is rotated. The resulting drift is a function of the angular displacement between the spin axis and the rotation axis. 2, record 3, English, - autoerection
Record number: 3, Textual support number: 1 OBS
Honeywell Displacement Gyroscope. Model 0048B5, Series 19. Synchro outputs, and has onboard auto erection circuits to level gyro in normal flight conditions. 3, record 3, English, - autoerection
Record 3, Key term(s)
- auto-erection
- auto erection
Record 3, French
Record 3, Domaine(s)
- Instruments et équipement de bord (Constructions aéronautiques)
- Pilotage et navigation aérienne
- Instruments de navigation
Record 3, Main entry term, French
- auto-érection
1, record 3, French, auto%2D%C3%A9rection
correct, feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 OBS
L'horizon gyroscopique, ou horizon artificiel [...] est essentiellement un gyroscope à deux axes de cardan [...] La verticalité de l'axe de la toupie [delta] est approximativement assurée par un érecteur(mécanique, électro-mécanique, pneumatique) produisant une raideur en quadrature de signe convenable. 2, record 3, French, - auto%2D%C3%A9rection
Record 3, Key term(s)
- autoérection
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2002-04-17
Record 4, English
Record 4, Subject field(s)
- Flight Instruments and Equipment (Aeroindustry)
- Aircraft Piloting and Navigation
- Navigation Instruments
Record 4, Main entry term, English
- ball erector
1, record 4, English, ball%20erector
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
- ball erecting mechanism 2, record 4, English, ball%20erecting%20mechanism
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
Navigation system... Thales informed airlines ... that a new design of erector subassembly had been introduced by SB 700-34-026 issued in August 1999. The ball erector subassembly has been replaced by a pendulum erector subassembly. 1, record 4, English, - ball%20erector
Record number: 4, Textual support number: 1 OBS
In a skidding turn, the gyro precesses towards the inside of the turn. After return of the aircraft to straight and level flight, the instrument shows a turn in the direction of the skid. In a normal turn, the gyro precesses towards the inside of the turn. The precession error is quickly corrected by the erecting mechanism. 3, record 4, English, - ball%20erector
Record 4, French
Record 4, Domaine(s)
- Instruments et équipement de bord (Constructions aéronautiques)
- Pilotage et navigation aérienne
- Instruments de navigation
Record 4, Main entry term, French
- système érecteur à billes
1, record 4, French, syst%C3%A8me%20%C3%A9recteur%20%C3%A0%20billes
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
- érecteur à billes 2, record 4, French, %C3%A9recteur%20%C3%A0%20billes
correct, masculine noun
- asservissement de verticale à billes 3, record 4, French, asservissement%20de%20verticale%20%C3%A0%20billes
masculine noun
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
Si l’avion suit un méridien terrestre sur une distance de 800 km, quel sera l’angle de l’axe gyro et de la verticale du point survolé? [...] [La question] conduit à réaliser un asservissement permanent de l’axe du gyro à la verticale du lieu de la Terre survolé. Un tel système s’appelle système érecteur ou asservissement de verticale. [...] Description d’un système érecteur à billes : Sur le cadre S2 est monté un moteur entraînant à vitesse très lente un tore en rotation autour de z3. Dans ce tore, des billes circulent et sont très légèrement entraînées par des petits crochets fournissant des forces faibles. Quand le tore est «à plat», c’est-à-dire horizontal, les billes sont uniformément réparties sur le tore grâce aux crochets qui les font circuler en les poussant par l’arrière. 1, record 4, French, - syst%C3%A8me%20%C3%A9recteur%20%C3%A0%20billes
Record number: 4, Textual support number: 1 OBS
Horizon gyroscopique [...] La verticalité de l'axe de toupie [delta] est approximativement assurée par un érecteur(mécanique, électro-mécanique, pneumatique) produisant une raideur en quadrature de signe convenable. 2, record 4, French, - syst%C3%A8me%20%C3%A9recteur%20%C3%A0%20billes
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2002-01-24
Record 5, English
Record 5, Subject field(s)
- Flight Instruments and Equipment (Aeroindustry)
- Aircraft Piloting and Navigation
- Navigation Instruments
Record 5, Main entry term, English
- pendulum erector
1, record 5, English, pendulum%20erector
correct
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 CONT
Navigation system... Thales informed airlines ... that a new design of erector subassembly had been introduced by SB 700-34-026 issued in August 1999. The ball erector subassembly has been replaced by a pendulum erector subassembly. 1, record 5, English, - pendulum%20erector
Record 5, French
Record 5, Domaine(s)
- Instruments et équipement de bord (Constructions aéronautiques)
- Pilotage et navigation aérienne
- Instruments de navigation
Record 5, Main entry term, French
- érecteur à pendule
1, record 5, French, %C3%A9recteur%20%C3%A0%20pendule
correct, masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 CONT
Figure 4-12. Partie gyroscopique d’un horizon artificiel : érecteur à pendule. 1, record 5, French, - %C3%A9recteur%20%C3%A0%20pendule
Record number: 5, Textual support number: 1 OBS
Horizon gyroscopique [...] La verticalité de l'axe de toupie [delta] est approximativement assurée par un érecteur(mécanique, électro-mécanique, pneumatique) produisant une raideur en quadrature de signe convenable. 1, record 5, French, - %C3%A9recteur%20%C3%A0%20pendule
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 2001-09-19
Record 6, English
Record 6, Subject field(s)
- Astrophysics and Cosmography
- General Mechanics (Physics)
- Flight Instruments and Equipment (Aeroindustry)
Record 6, Main entry term, English
- axial rotation
1, record 6, English, axial%20rotation
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 CONT
Referring to Fig. 6, the central, axially oriented, gyro-wheel 32 is then spun-up as illustrated by spin symbol 36. This causes the magnifying glass 10 to counter-rotate as illustrated by spin symbol 34 and to deploy under centrifugal force. An example such a gyro-wheel is Honeywell's commercial gyro, model HM-I 800. After deployment, the continuing axial rotation stiffens the magnifying glass membrane, holding it taut and maintaining the necessary optical tolerances. 2, record 6, English, - axial%20rotation
Record number: 6, Textual support number: 2 CONT
Solar system syllabus ... explains the concept of the Earth's axial rotation giving day and night. 3, record 6, English, - axial%20rotation
Record 6, French
Record 6, Domaine(s)
- Astrophysique et cosmographie
- Mécanique générale (Physique)
- Instruments et équipement de bord (Constructions aéronautiques)
Record 6, Main entry term, French
- rotation axiale
1, record 6, French, rotation%20axiale
correct, feminine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 CONT
Gyroscopie [...] On peut [...] rappeler qu'en particulier si la rotation axiale se fait autour du grand axe d’inertie, l'orientation de cet axe reste fixe dans un repère inertiel. De plus dans le cas d’une grande vitesse de rotation axiale, le mouvement présente alors une très grande stabilité, appelée raideur gyroscopique, qui se manifeste par des mouvements très lents de l'axe du gyroscope, donc des vitesses angulaires très faibles et donc des accélérations angulaires encore plus faibles. [...] Le corps tournant appartient à un système complexe et présente soit un moment d’inertie axial très important, soit une rotation axiale très rapide, par rapport aux rotations possibles des autres parties du système, soit les deux. Dans tous les cas on parlera d’un «moment cinétique H=I [oméga] important», avec une rotation de 250 à 3000 t/s et un moment cinétique de 10 [puissance 3] à 1 N-m/s. 2, record 6, French, - rotation%20axiale
Record number: 6, Textual support number: 2 CONT
Un gyrostat [...] est un mobile en rotation axiale, comme par exemple une toupie. 3, record 6, French, - rotation%20axiale
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - internal organization data 2001-09-19
Record 7, English
Record 7, Subject field(s)
- General Mechanics (Physics)
- Flight Instruments and Equipment (Aeroindustry)
- Navigation Instruments
Record 7, Main entry term, English
- axial inertia moment
1, record 7, English, axial%20inertia%20moment
correct
Record 7, Abbreviations, English
Record 7, Synonyms, English
- axial moment of inertia 2, record 7, English, axial%20moment%20of%20inertia
correct
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
... we conclude ... that the inertia forces main moment for the rigid body rotation around the fixed axis has three components: the first one is purely rotatory around the rotation axis collinear with it if the angular acceleration is different from zero and it is proportional to the angular acceleration [xxx] and the body mass axial inertia moment for the rotation axis, [yyy]; and the second deviational component is normal to the rotation axis which also depends on the angular acceleration and the vector [zzz] of the deviation load of the rotation axis; and third component depending on the angular velocity squared of the rigid body rotation around the fixed axis and on the magnitude of the mass deviation moment vector of the rotation axis at the pole in the stationary bearing. 1, record 7, English, - axial%20inertia%20moment
Record 7, French
Record 7, Domaine(s)
- Mécanique générale (Physique)
- Instruments et équipement de bord (Constructions aéronautiques)
- Instruments de navigation
Record 7, Main entry term, French
- moment d’inertie axial
1, record 7, French, moment%20d%26rsquo%3Binertie%20axial
correct, masculine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
- moment d’inertie axial du gyroscope 2, record 7, French, moment%20d%26rsquo%3Binertie%20axial%20du%20gyroscope
correct, masculine noun
Record 7, Textual support, French
Record number: 7, Textual support number: 1 CONT
Gyroscopie [...] On peut [...] rappeler qu'en particulier si la rotation axiale se fait autour du grand axe d’inertie, l'orientation de cet axe reste fixe dans un repère inertiel. De plus dans le cas d’une grande vitesse de rotation axiale, le mouvement présente alors une très grande stabilité, appelée raideur gyroscopique, qui se manifeste par des mouvements très lents de l'axe du gyroscope, donc des vitesses angulaires très faibles et donc des accélérations angulaires encore plus faibles. [...] Le corps tournant appartient à un système complexe et présente soit un moment d’inertie axial très important, soit une rotation axiale très rapide, par rapport aux rotations possibles des autres parties du système, soit les deux. Dans tous les cas on parlera d’un «moment cinétique H=I [oméga] important», avec une rotation de 250 à 3000 t/s et un moment cinétique de 10 [puissance 3] à 1 N-m/s. 3, record 7, French, - moment%20d%26rsquo%3Binertie%20axial
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - internal organization data 2001-09-19
Record 8, English
Record 8, Subject field(s)
- General Mechanics (Physics)
- Aircraft Piloting and Navigation
- Navigation Instruments
- Flight Instruments and Equipment (Aeroindustry)
Record 8, Main entry term, English
- transverse angular velocity
1, record 8, English, transverse%20angular%20velocity
correct
Record 8, Abbreviations, English
Record 8, Synonyms, English
- angular transverse velocity 2, record 8, English, angular%20transverse%20velocity
correct
Record 8, Textual support, English
Record 8, French
Record 8, Domaine(s)
- Mécanique générale (Physique)
- Pilotage et navigation aérienne
- Instruments de navigation
- Instruments et équipement de bord (Constructions aéronautiques)
Record 8, Main entry term, French
- vitesse angulaire transversale
1, record 8, French, vitesse%20angulaire%20transversale
correct, feminine noun
Record 8, Abbreviations, French
Record 8, Synonyms, French
- vitesse angulaire transverse 2, record 8, French, vitesse%20angulaire%20transverse
feminine noun
Record 8, Textual support, French
Record number: 8, Textual support number: 1 CONT
Raideur gyroscopique : Appelons [oméga] la mesure de la vitesse angulaire transversale qui est engendrée par le couple. Cette vitesse porte le nom de précession du gyroscope, c'est elle qui engendre la nutation. 1, record 8, French, - vitesse%20angulaire%20transversale
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - internal organization data 2001-08-21
Record 9, English
Record 9, Subject field(s)
- General Mechanics (Physics)
- Aircraft Piloting and Navigation
- Navigation Instruments
- Flight Instruments and Equipment (Aeroindustry)
Record 9, Main entry term, English
- principal axis of compliance
1, record 9, English, principal%20axis%20of%20compliance
correct
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, Textual support, English
Record number: 9, Textual support number: 1 DEF
[Of a gyro or accelerometer] an axis along which an applied force results in a displacement along that axis only. 2, record 9, English, - principal%20axis%20of%20compliance
Record 9, French
Record 9, Domaine(s)
- Mécanique générale (Physique)
- Pilotage et navigation aérienne
- Instruments de navigation
- Instruments et équipement de bord (Constructions aéronautiques)
Record 9, Main entry term, French
- axe principal d’inertie
1, record 9, French, axe%20principal%20d%26rsquo%3Binertie
correct, masculine noun
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record number: 9, Textual support number: 1 CONT
Principe mécanique : La stabilisation par «SPIN» ou encore «raideur gyroscopique», repose sur le résultat capital du mouvement de Poinsot, qui indique que si la rotation du solide est portée par un axe principal d’inertie, cet axe restera fixe dans l'espace inertiel. Nous avons aussi montré que le mouvement libre est stable si cet axe est celui de plus grande inertie, notamment en présence de dissipations internes. 2, record 9, French, - axe%20principal%20d%26rsquo%3Binertie
Record 9, Spanish
Record 9, Textual support, Spanish
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