TERMIUM Plus®

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ANGULAR MODULATION [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2010-12-02

English

Subject field(s)
  • Flight Instruments and Equipment (Aeroindustry)
  • Aircraft Piloting and Navigation
  • Navigation Instruments
CONT

The gyros are used to maintain the platform’s inertial orientation by sensing rotations of the platform caused by vehicle-rotation-induced friction at the gimbal pivot points ... One gyro - called the vertical gyro - is oriented so its input axes are aligned with the X and Y platform axes; its input axes provide IMU [Inertial Measurement Unit] platform roll and pitch stabilization. The second gyro is oriented so that one input axis lies along the platform’s Z axis and the other lies in the X-Y plane. This gyro - the azimuth gyro - provides platform yaw stabilization with the Z input axis, while the second input axis is used as a platform rate detector for built-in test equipment.

CONT

The sensors for angular velocity are vibrating gyroscopes(3 axes, to detect rotation and pitch/roll pendulations of the payload). An error signal is obtained differencing the signal from the azimuth gyroscope and a constant level settable from the telemetry, which controls the speed of rotation. Such error signal drives an analog PID [Proportional Integral Differential] circuit; the output of the PID is connected to the PWM [Pulse Width Modulation] driver supplying current to the pivot azimuth motors.

CONT

azimuth gyro: term used at Natural Resources Canada - Earth Sciences Sector.

PHR

Azimuth gyro drift rate.

French

Domaine(s)
  • Instruments et équipement de bord (Constructions aéronautiques)
  • Pilotage et navigation aérienne
  • Instruments de navigation
CONT

La plate-forme stabilisée [...] Trois gyroscopes sont utilisés : (a) Un gyroscope d'azimut qui, n'ayant aucun degré de liberté dans l'axe vertical, détecte tout déplacement de la plate-forme en azimut. (b) Deux gyroscopes d'inclinaison [...]

OBS

gyroscope d'azimut : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

PHR

Vitesse de dérive du gyroscope d'azimut.

Spanish

Save record 1

Record 2 2002-08-14

English

Subject field(s)
  • Telecommunications Transmission
  • Radio Waves
  • Radio Broadcasting
  • Computer Graphics
DEF

Modulation in which the phase angle is the characteristic varied.

OBS

Phase and frequency modulation are particular forms of angle modulation.

French

Domaine(s)
  • Transmission (Télécommunications)
  • Ondes radioélectriques
  • Radiodiffusion
  • Infographie
DEF

Modulation où la caractéristique que l'on fait varier est l'angle de phase de l'onde porteuse.

OBS

La modulation de phase et la modulation de fréquence sont des cas particuliers de la modulation d'angle.

Spanish

Campo(s) temático(s)
  • Transmisión (Telecomunicaciones)
  • Ondas radioeléctricas
  • Radiodifusión
  • Gráficos de computadora
DEF

Modulación en la que la característica que varía es el ángulo de fase.

OBS

La modulación de fase y la modulación de frecuencia son formas particulares de modulación angular.

Save record 2

Record 3 2001-04-10

English

Subject field(s)
  • Air Navigation Aids
  • Signalling and Illumination (Air Transport)
DEF

The angular or linear displacement of any point of zero DDM [difference in depth of modulation] with respect to the nominal course line or the nominal ILS [instrument landing system] glide path respectively.

OBS

displacement error: term and definition officially approved by the International Civil Aviation Organization (ICAO).

French

Domaine(s)
  • Aides à la navigation aérienne
  • Signalisation (Transport aérien)
DEF

Écart angulaire ou linéaire par rapport à l'alignement nominal de piste ou de descente ILS [système d'atterrissage aux instruments], d'un point de DDM [différence de modulation] nulle.

OBS

erreur d'écart : terme et définition uniformisés par l'Organisation de l'aviation civile internationale (OACI).

Spanish

Campo(s) temático(s)
  • Ayuda para la navegación aérea
  • Señales e iluminación (Transporte aéreo)
DEF

Desplazamiento angular o lineal de cualquier punto de DDM [diferencia de profundidad de modulación] cero respecto al eje de rumbo nominal o a la trayectoria de planeo ILS [sistema de aterrizaje por instrumentos] nominal, respectivamente.

OBS

error de desplazamiento : término y definición aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).

Save record 3

Record 4 2000-02-15

English

Subject field(s)
  • Aircraft Piloting and Navigation
DEF

The ratio of measured DDM [difference in depth of modulation] to the corresponding angular displacement from the appropriate reference line.

OBS

ILS: instrument landing system

French

Domaine(s)
  • Pilotage et navigation aérienne
DEF

Rapport de la DDM mesurée à l'écart angulaire correspondant à partir de la ligne de référence appropriée.

Spanish

Campo(s) temático(s)
  • Pilotaje y navegación aérea
DEF

La proporción de la DDM medida hasta el desplazamiento angular correspondiente, a partir de la línea de referencia apropiada.

Save record 4

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