Rotating seal for anti-stiction of hydraulic struts

G - Physics – 08 – B

Patent

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G08B 21/00 (2006.01) B64C 25/00 (2006.01)

Patent

CA 2603444

An onboard system for use in measuring, computing and displaying the weight and center-of-gravity for aircraft, while keeping aircraft movement to a minimum. Pressure sensors are mounted in relation to each of the landing gear struts. A motor and rotating seal are configured into each strut and are activated by a computer/controller, while landing gear strut pressures are monitored in the determination of strut stiction. The computer/controller calculates the stiction of each landing gear strut and compensates for the pressure distortions caused by landing gear strut stiction. Additional features include reducing strut stiction, measuring landing gear strut fluid levels, monitoring landing gear strut health, weight adjustments for external ice and de-icing fluids, weight adjustments for wind, monitoring aircraft landing gear strut movement.

L'invention concerne un système embarqué destiné à être utilisé pour mesurer, calculer et afficher le poids et le centre de gravité d'un avion, tout en maintenant le mouvement de l'avion à un minimum. Des capteurs de pression sont montés relativement à chacune des jambes de trains d'atterrissage. Un moteur et un joint rotatif sont conçus dans chaque jambe et sont activés par un ordinateur/contrôleur, tandis que des pressions des jambes de trains d'atterrissage sont surveillées afin de déterminer le frottement statique des jambes. L'ordinateur/contrôleur calcule le frottement statique de chaque jambe de trains d'atterrissage et compense les distorsions de pression causées par le frottement statique des jambes de trains d'atterrissage. Des caractéristiques supplémentaires comprennent la réduction du frottement statique des jambes, la mesure des niveaux de fluides des jambes de trains d'atterrissage, la surveillance de l'état des jambes de trains d'atterrissage, des réglages de poids pour le givre extérieur et des fluides de dégivrage, des réglages de poids pour le vent, la surveillance du mouvement des jambes de trains d'atterrissage de l'avion.

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