Abstract: A shape memory alloy (SMA) actuated aerostructure operable to dynamically change shape according to flight conditions is disclosed. Deformable structures are actuated by SMA actuators that are coupled to face sheets of the deformable structures. Actuating the SMA actuators produces complex shape changes of the deformable structures by activating shape changes of the SMA actuators. The SMA actuators are actuated via an active or passive temperature change based on operating conditions. The SMA actuated aerostructure can be used for morphable nozzles such as a variable area fan nozzle and/or a variable geometry chevron of a jet engine to reduce engine noise during takeoff without degrading fuel burn during cruise.

Abstract: A shape memory alloy (SMA) actuated aerostructure operable to dynamically change shape according to flight conditions is disclosed. Deformable structures are actuated by SMA actuators that are coupled to face sheets of the deformable structures. Actuating the SMA actuators produces complex shape changes of the deformable structures by activating shape changes of the SMA actuators. The SMA actuators are actuated via an active or passive temperature change based on operating conditions. The SMA actuated aerostructure can be used for morphable nozzles such as a variable area fan nozzle and/or a variable geometry chevron of a jet engine to reduce engine noise during takeoff without degrading fuel burn during cruise.

Abstract: An energy conversion apparatus having a pair of flexible beams that are supported at first ends thereof from a base. The beams each include at least one piezoelectric material layer. Second ends of each of the beams are operatively coupled to rigid links. The rigid links are in turn operatively coupled to a working element that may form, in one application, a drive member for a motor, or in a second application form a valve element for an electronic fuel injection system, or in a third application form a piston for a fluid pump. The working element is free to move linearly in a path generally parallel to the longitudinal axes of the flexible beams. As electrical signals are applied to and removed from the piezoelectric material layer(s) of each flexible beam, the beams flex repeatedly and uniformly over their full lengths. This causes a linear movement of the working element that can be used to help form a rotational motor output or a linearly moving fluid control element.

Abstract: An energy conversion apparatus having a pair of flexible beams that are supported at first ends thereof from a base. The beams each include at least one piezoelectric material layer. Second ends of each of the beams are operatively coupled to rigid links. The rigid links are in turn operatively coupled to a working element that may form, in one application, a drive member for a motor, or in a second application form a valve element for an electronic fuel injection system, or in a third application form a piston for a fluid pump. The working element is free to move linearly in a path generally parallel to the longitudinal axes of the flexible beams. As electrical signals are applied to and removed from the piezoelectric material layer(s) of each flexible beam, the beams flex repeatedly and uniformly over their full lengths. This causes a linear movement of the working element that can be used to help form a rotational motor output or a linearly moving fluid control element.