Controller, cabin pressure control system and method of...

B - Operations – Transporting – 64 – D

Patent

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Details

B64D 13/04 (2006.01)

Patent

CA 2384268

The present invention relates to a controller (11), a cabin pressure control system (10) and a method for controlling pressure in a cabin (30), especially an aircraft cabin. In accordance with the invention the controller (11) comprises a channel (15; 16) and a pressure differential safety function (22). The channel (15; 16) calculates a first output signal (40) for actuating an overflow valve (17) in a closed loop control based on the pressure differential between the cabin (30) and the atmosphere and additional critical parameters. The safety function (22) calculates a second output signal (41) based only on the pressure differential. The two output signals (40, 41) are compared, and the second output signal (41) is selected, if said first output signal (40) is found inaccurate. The safety function (22) assures operation of the outflow valve (17) even if the channel (15; 16) is out of function. Accordingly, the number of additional safety valves (18) may be reduced so that the weight of the system (10) is minimized. A manual control panel (26) is provided for backup.

La présente invention concerne un régulateur (11), un système régulation de pression de cabine (10) et un procédé régulation de pression de cabine (30), en l'occurrence de cabine d'aéronef. Selon l'invention, le régulateur (11) comporte un canal (15, 16) et une fonction de sécurité à différentiel de pression (22). Le canal (15, 16) calcule un premier signal de sortie (40) servant à actionner une soupape de compensation (17) d'une boucle de régulation sur la base du différentiel de pression entre la cabine (30) et l'atmosphère et de paramètres critiques additionnels. La fonction de sécurité (22) calcule un second signal de sortie (41) reposant uniquement sur le différentiel de pression. Les deux signaux de sortie (40, 41) sont comparés, et si le premier signal de sortie (40) est considéré comme inapproprié, c'est le second signal de sortie (41) qui est choisi. La fonction de sécurité (22) assure le fonctionnement de la vanne de régulation d'échappement de cabine (17) même si le canal (15, 16) n'est plus en état de marche. L'invention permet ainsi de réduire le nombre de soupapes de sûreté (16) de façon à ramener à un minimum le poids du système (10). L'invention comporte un tableau de commande manuel (26) pour une mise en oeuvre de secours.

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