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CALIBRATION EQUATION [2 records]

Record 1 2001-09-14

English

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

An inertial guidance system that makes use of a three-gimbal mounting whose inner gimbal is a stable platform on which three gyroscopes and accelerometers are mounted; the gyroscopes sense any rotation of the vehicle and drive the gimbals in the opposite direction, so that the inner platform remains fixed in inertial space.

CONT

Automatic Calibration of Transducers for Gimballed Inertial Navigation System on Uncontrolled Gyros. In the work a new approach to calibration of gimbaled Inertial Navigation system(INS) based on two electrostatically suspended gyros(ESG) is considered. The automatic calibration procedure of the inertial measuring unit(IMU) error models parameters, namely, the gimbal pick-off errors, is examined. The measurement errors for angle rotor position are described by equation. The gimbal pick-off errors are described by equation. The relationship between the gimbal pick-off errors and INS output errors is described by equation.

OBS

Gimballed.

OBS

Gimbaled.

Key term(s)
  • gimballed inertial system

French

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

Un nouveau type de centrale inertielle, déjà utilisée sur des avions comme les Airbus A 310 et A 320 [...] vient concurrencer les centrales inertielles à cardans (gimbaled inertial system). Il s'agit d'une centrale dite à composants liés (sous-entendu à la structure de l'avion) appelée en anglais «strap down inertial system». Dans ce cas, en effet, les accéléromètres et les gyromètres (ou les gyroscopes) sont fixés rigidement sur la structure.

Key term(s)
  • centrale inertielle gyrostabilisée

Spanish

Save record 1

Record 2 1999-03-16

English

Subject field(s)
  • Statistical Graphs and Diagrams
  • Computer Mathematics
CONT

Shading the space below the curve produces a shaded area--but not an area chart. For it to be defined as an area chart, the two plotting variables would have to be functionally related in some way. That is, it should be possible to express their relationship by an equation of some sort.... But regardless of the area shape, its value can be determined by the product of some vertical value and some horizontal value. This therefore relates the area to the name and calibration of the vertical and horizontal axes.

OBS

The common types of area graphs are squares, rectangles, and circles. ... In the construction of area ... charts, certain mathematical knowledge [of squared surfaces] is necessary.

OBS

Compare with "line chart".

French

Domaine(s)
  • Diagrammes et graphiques (Statistique)
  • Mathématiques informatiques
DEF

Graphique de surface ayant pour objet de représenter l'importance relative de certaines valeurs au cours d'une période. Le graphique en aires est semblable au graphique en courbes, mais met en évidence l'amplitude de la variation ou la grandeur des valeurs plutôt que l'écoulement du temps et le taux de variation.

Spanish

Campo(s) temático(s)
  • Diagramas y gráficos estadísticos
  • Matemáticas para computación
Save record 2

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