TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 DEF

... a system of mutually perpendicular reference axes fixed in an aircraft ... and moving with it.  3, fiche 1, Anglais, - body%20axis%20system

Record number: 1, Textual support number: 1 CONT

A good understanding of the basic axis system used to describe aircraft motion is necessary to fully appreciate flight test data, since all measurements are referenced to this axis system. Aircraft translational motion is described in terms of motion in three different directions, each direction being perpendicular to the other two (orthogonal). Motion in the X direction is forward and aft velocity. The Y direction produces sideways motion to the left and right, and up and down motion is in the Z direction... There are several slightly different versions of the basic axis system just described. They differ primarily in the exact placement of the zero reference lines, but are generally similar in their directions. (For example, the body-axis system uses the fuselage center line as the x axis, while a wind-axis system uses the direction that the aircraft is moving through the air as the x axis.)  4, fiche 1, Anglais, - body%20axis%20system

Record number: 1, Textual support number: 1 OBS

body axis system: term standardized by ISO.  5, fiche 1, Anglais, - body%20axis%20system

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Principe de fonctionnement des centrales inertielles à composants liés [...] La connaissance des vitesses angulaires instantanées permet par intégration de connaître en permanence la position angulaire du trièdre avion par rapport au repère géographique local. Les composantes du vecteur force spécifique, mesurées par les accéléromètres dans le trièdre avion peuvent alors être projetées dans le trièdre géographique local.  2, fiche 1, Français, - tri%C3%A8dre%20avion

Record number: 1, Textual support number: 1 OBS

trièdre avion : terme normalisé par l’ISO.  3, fiche 1, Français, - tri%C3%A8dre%20avion

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 CONT

Gyrometers and gyroscopes. Gyrometers measure the angular velocity. Such measurement is based on the measure of Coriolis forces for a mobile in linear motion, when an additional rotation occurs... Gyroscopes are made of a solid body with high angular velocity around an axis of symmetry ... which induces a high angular stability in presence of perturbations. Such a device is used to preserve a fixed inertial orientation, while the rest of the system in in motion. It must be noted that both devices provide an information about angular velocity. The first device output is the instantaneous angular velocity, while the second device output is the integration of the angular velocity during a period of time. Angular position information can be computed from gyrometers output by integration, while angular velocity information can be computed from gyroscopes output by derivation.  2, fiche 2, Anglais, - instantaneous%20angular%20velocity

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 CONT

Principe de fonctionnement des centrales inertielles à composants liés [...] La connaissance des vitesses angulaires instantanées permet par intégration de connaître en permanence la position angulaire du trièdre avion par rapport au repère géographique local. Les composantes du vecteur force spécifique, mesurées par les accéléromètres dans le trièdre avion peuvent alors être projetées dans le trièdre géographique local.  1, fiche 2, Français, - vitesse%20angulaire%20instantan%C3%A9e

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Français

Fiche 3,  Justifications,  Espagnol