Compensation for overflight velocity when stabilizing an...

G - Physics – 05 – D

Patent

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G05D 3/12 (2006.01) F16M 1/00 (2006.01) G03B 15/00 (2006.01) G06T 1/00 (2006.01) H04N 5/232 (2006.01) H04N 7/18 (2006.01)

Patent

CA 2513514

A method and system for maintaining the line of sight of an airborne camera fixed on a target by compensating for overflight velocity of the aircraft. The compensation system automatically commands an angular velocity of the line of sight to maintain the camera pointing at the target being overflown. This angular velocity of the line of sight is computed based upon the aircraft overflight velocity and upon a vector from the aircraft to the target. This automatic compensation for aircraft overflight velocity causes the line of sight to remain fixed upon the target. The compensation system drives a gimbal system upon which the camera is mounted to perform this compensation automatically.

L'invention concerne un procédé et un système permettant de maintenir la ligne de visibilité d'une caméra de bord fixée sur une cible, par la compensation de la vitesse de survol de l'aéronef. Ce système de compensation commande automatiquement une vitesse angulaire de la ligne de visibilité, de sorte à maintenir la caméra dirigée sur la cible survolée. La vitesse angulaire de la ligne de visibilité est calculée en fonction de la vitesse de survol de l'aéronef et d'un vecteur allant de l'aéronef à la cible. Cette compensation automatique de la vitesse de survol de l'aéronef permet à la ligne de visibilité de rester fixée sur la cible. Le système de compensation selon l'invention entraîne un système cardan sur lequel est montée la caméra, de sorte à effectuer automatiquement la compensation.

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