摘要:
A variable edge rotor blade (30) adapted to be driven by the rotor hub includes an airfoil section (30); a movable edge section (32) coupled to the airfoil section, and an actuator device (40) operating independently of the hub, disposed in the blade proximate the movable edge section, fixed to the airfoil section and coupled to the movable edge section for oscillating it between an increased lift and decreased lift position.
摘要:
A hub mounted actuation system (20) for providing control of a portion of a rotor blade, on a rotorcraft. The rotor blade is attached to a rotor shaft (104) that rotates with respect to an airframe. The hub mounted actuation system includes a stationary support (106) mounted to the airframe and a rotary support (110) attached to the rotor shaft for concomitant rotation therewith. At least one hub actuator (112) rotates in combination with the rotor blade and includes a piston (114) which is slidable within a housing (116). The piston and housing define a pressure chamber within the actuator which contains a fluid to be pressurized. A displacement control device is disposed between the stationary support and the rotary support for controlling movement of the piston within the housing. A linkage (26) connects the hub actuator to the portion of the blade to be controlled. The linkage is adapted to displace the blade portion as a function of the movement of the piston within the housing.
摘要:
Die vorliegende Erfindung betrifft eine piezokeramische Platte und ein Verfahren zur Herstellung derselben. Aufgabe ist es hierbei, eine piezokeramische Struktur zu schaffen, die einerseits ausreichend Festigkeit bzw. Steifigkeit aufweist und andererseits flexibel und elastisch verformbar ist, so dass sie für das Aufbringen auf gewölbte Flächen sowie die Integration in Verbundstrukturen geeignet ist. Eine derartige piezokeramische Platte findet beispielsweise zum Erfassen und / oder Bewirken von Verformungen von Rotorblättern, Tragflächen und dergleichen Anwendung.
摘要:
Die Erfindung umfaßt ein Rotorblatt (10) für einen Helikopter mit einer Blattwurzel zur Befestigung im Bereich des Rotormastes und einer radial außen liegenden Blattspitze, wobei zwischen Blattwurzel und Blattspitze eine im wesentlichen im Umriß des Blattprofils integrierte aerodynamische Steuerklappe (20) schwenkbar im Rotorblatt gelagert ist, wobei die Steuerklappe an ihren beiden Enden jeweils über Wälzlager (34,35) auf in Spannweitenrichtung des Rotorblatts ausgerichteten Lagerbolzen gelagert ist (32,31) und daß das radial äußere Lager (31) der Steuerklappe Mittel (33,36) aufweist, welche die aus der Rotation des Rotorblattes sich ergebenden Fliehkräfte der Steuerklappe auf das Rotorblatt abstützen.
摘要:
Rotorblatt (1) für einen Helikopter mit einer im wesentlichen im Umriß des Blattprofils integrierten, auf einer Drehachse schwenkbar gelagerten aerodynamischen Steuerklappe (10), insbesondere Wölbklappe, an welcher außerhalb der Drehachse ein Steuermittel (30), insbesondere eine Steuerstange, zur Umsetzung einer Linearbewegung in eine Schwenkbewegung der Steuerklappe (10) angelenkt ist, wobei das Steuermittel (30) über Wälzlager (46, 53a, 54a) und in Spannweitenrichtung ausgerichtete Bolzen (41, 51, 52) gelagert ist und Mittel vorgesehen sind, welche sich aus der Rotation des Rotorblattes ergebende Fliehkräfte des Steuermittels (30) über die Steuerklappe (10) aufnehmen.
摘要:
An actuating device (100) can change a position of an active member (102) that remains in substantially the same position in the absence of a force of a predetermined magnitude on the active member (102). The actuating device comprises a shape-memory alloy actuating member (104) for exerting a force when actuated by changing the temperature thereof, which shape-memory alloy actuating member (104) has a portion for connection to the active member (102) for exerting thereon a force having a magnitude at least as large as the predetermined magnitude for moving the active member (102) to a desired position. Actuation circuitry (200) is provided for actuating the shape-memory alloy actuating member (104) by changing the temperature thereof only for the time necessary to move the active member (102) to the desired position. The invention is particularly useful for changing the position of a camber-adjusting tab (104) on a helicopter rotor blade (102) by using two shape-memory alloy members (104) that can act against each other to adjust dynamic properties of the rotor blade (102) as it is rotating.
摘要:
A blade (11) of the rotor is attached to a main rotor shaft (12), and is rotated counterclockwise at a high speed when viewed from above. In the vicinity of the blade tip, a flap (13) having a wing shape in section is pivotally supported with a hinge (15) so as to be angularly displaceable and to the end a part of the rear end of the blade (11) is cut out. A hinge line (14) which indicates the center of the angular displacement of the hinge (15) is formed so as to be parallel to a straight line (L) passing through the rotation center (C) of the rotor and the center of gravity (G) of the flap. A helicopter rotor equipped with flaps is provided in which the influence of the centrifugal force acting on the center of gravity of a blade can be largely reduced, and a flap control mechanism can be reduced in size and weight.
摘要:
An aircraft comprising an airframe; a rotor system mounted to the airframe, the rotor system including a plurality of rotor blades, each of the plurality of rotor blades including a root portion extending to a tip portion through an airfoil portion, the airfoil portion having a leading edge and a trailing edge; at least one control surface mounted within the airfoil portion of at least one of the plurality of rotor blades; at least one actuator configured to actuate the at least one control surface; and at least one actuator configured to pitch at least one of the plurality of rotor blades about a blade pitch axis