Helicopter engine control having yaw input anticipation

Details Helicopter engine control having yaw input anticipation Helicopter engine control having yaw input anticipation

G - Physics

05

D

G05D 1/08 (2006.01) G05D 1/00 (2006.01)

Patent

CA 2116340

A helicopter engine fuel control anticipates sudden changes in engine power demand during yaw inputs to thereby minimize engine and main rotor speed droop and overspeed during yaw maneuvers. The rate (121, 123) of yaw control (107) position change generates (10) a yaw component (104) of a helicopter fuel control (52) fuel command signal (70). The magnitude of the yaw component is also dependent upon the rate of yaw control position change (703). The fuel command signal yaw component (104) is overrides (113, 115) when rotor decay rate (209, 217) has been arrested during a sharp left hover turn (216); when the yaw component is removing fuel (239) during rotor droop (238); and when the yaw component is adding fuel (228) during rotor overspeed (227).

L'invention se rapporte à une commande pour moteur d'hélicoptère par amenée de carburant, qui anticipe les variations brusques de la demande d'énergie du moteur lors de l'introduction de lacets, afin de réduire au minimum les phénomènes de relâchement de régime et de surrégime du moteur et du rotor principal, lors de manoeuvres de lacet. La vitesse (121, 123) du changement de position de la commande de lacet (107) génère (110) une composante de lacet (104) d'un signal d'instruction de carburant (70) pour la commande (52) de l'hélicoptère par amenée de carburant. L'amplitude de la composante de lacet dépend également de la vitesse du changement de position (703) de la commande de lacet. La composante de lacet du signal d'instruction de carburant perd la priorité (113, 115), lorsque la vitesse de ralentissement (209, 217) de la rotation du rotor est arrêtée lors d'un virage stationnaire serré à gauche (216); lorsque la composante de lacet réduit l'amenée de carburant (239) pendant le relâchement (238) du rotor; et lorsque la composante de lacet ajoute du carburant (228) pendant un surrégime (227) du rotor.

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