3d autonomous integrity monitored extrapolation navigation

G - Physics – 05 – D

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G05D 1/00 (2006.01) B64D 45/04 (2006.01) G01C 5/00 (2006.01) G01C 21/16 (2006.01) G01S 1/02 (2006.01) G01S 5/14 (2006.01)

Patent

CA 2376120

In the 3D AIME mechanization (1) measurements of altitude above mean sea level are first referenced to AIME computer altitude by adder (3) and then pre- filtered by the pre-filter (5). The computer altitude is obtained from computing unit (11) through switch (4). The pre-filtered measurements pass through switch (6) to AIME Kalman filter (7) where they are used as observations in obtaining estimates of the barometric offset at the runway and the barometric scale factor offset from the runway to the aircraft present altitude.

Dans la mécanisation (1) AIME en 3D, les mesures au dessus du niveau moyen de la mer sont d'abord référencées en altimétrie AIME par un additionneur (3), puis elles sont pré-filtrées par le préfiltre (5). L'altimétrie est obtenue d'une unité de calcul (11) par commutateur (4). Les mesures pré-filtrées passent par le commutateur (6) dans le filtre (7) Kalman AIME, où elles sont utilisées comme observations permettant d'obtenir des estimations du décalage barométrique au niveau de la piste et du décalage de facteur d'échelle barométrique existant entre la piste et l'altitude présente de l'aéronef.

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