摘要:
A system (401) and method to isolate vibrations from a vibrating structure (413). The system (401) includes an adjustable vibration isolator (409; 501; 701) that creates a reacting force matching the vibratory force of the vibrating structure. The method includes continuously monitoring the reacting force and vibratory force with a sensor system (403) operably associated with a control unit (405) having an algorithm (801; 901; 1001; 1101) to determine if adjustment of the vibration isolator (409; 501; 701) is required. If required, the control unit commands a driver to selectively adjust the vibration isolator (409; 501; 701).
摘要:
A lubrication system (200) is disclosed. The lubrication system (200) may have a collection area (300) for collecting lubricating media (120) and a pumping system (400) for transporting the lubricating media (120) from a withdrawal location of the collection area (300) to a distribution location (440) of the collection area (300). The lubricating media (120) may collect in the collection area (300) to a static level (380) when the pumping system (400) is off and to a dynamic level (370) when the pumping system (400) is on. The lubrication system (200) may also include a drain valve (500, 520, 550, 580) located between the static level (380) and the dynamic level (370). The drain valve (500, 520, 550, 580) may operable to open to drain a portion of the lubricating media (120) in response to the lubricating media (120) reaching a predefined threshold temperature and level. The valve (500, 520, 550, 580) may comprise a thermally-activated material (560), and the material (560) may substantially change phase or volume upon reaching a predetermined temperature.
摘要:
Embodiments refer generally to systems and methods for providing autorotative enhancement for helicopters (120) using an autorotative assist unit (110) coupled to the transmission (102) of the helicopter (120). Methods of utilizing an autorotative assist unit (110) as well as retrofitting an autorotative assist unit (110) to an existing helicopter (120) are also disclosed. By employing an autorotative assist unit (110), improved autorotation may be achieved without the need to increase the weight of the rotor (108).
摘要:
A system (301; 401) and method to change a spring rate of a damper (201) in real time. The damper includes a housing (203) having an inner surface that forms a cavity (204). An elastomeric material (205) is disposed within the cavity and fixedly attached to the inner surface (207) of the housing. A first chamber (215) is formed by a first end (217) of the elastomeric material (205) and the inner surface (207) of the housing. The method includes restricting movement of the elastomeric material by regulating the pressure within the first chamber, which in turn changes the spring rate of the damper.
摘要:
L'invention se rapporte à un procédé de sécurisation d'un aéronef (10) survolant un sol, le procédé comprenant les étapes de: - acquisition d'une première hauteur de l'aéronef (10) par rapport au sol à un premier instant, - acquisition d'une deuxième hauteur de l'aéronef (10) par rapport au sol à un deuxième instant, - enregistrement de l'intervalle de temps écoulé entre les deux instants d'acquisition de hauteurs, - calcul de la vitesse de rapprochement du sol de l'aéronef (10), - comparaison de la vitesse de rapprochement du sol de l'aéronef (10) avec une valeur de vitesse seuil, - détection d'un risque de collision de l'aéronef (10) avec le sol lorsque la vitesse de rapprochement du sol de l'aéronef (10) est supérieure à la vitesse seuil.
摘要:
According to one embodiment, a stability augmentation system 200 includes a master linkage 210, a stability augmentation motor 220, and three linkages 212, 214, 216. A first linkage 212, is coupled to the master linkage 210 and operable to receive movements representative of pilot commands from a pilot command system. A second linkage 214 is coupled between the stability augmentation motor 220 and the master linkage 210 and operable to receive movements representative of augmentation commands from the stability augmentation motor 220. A third linkage 216 is coupled to the master linkage 210 and operable to transmit movements representative of blade position commands to a blade control system 116 in response to the movements representative of pilot commands and the movements representative of augmentation commands. To be accompanied, when published, by Figure 3 of the drawings.