The Boeing Company
Shape memory alloy active hinge actuator

Abstract:

Certain aspects of the present disclosure provide an apparatus. The apparatus includes a first hinge element configured to engage and secure to a fixed element; a second hinge element configured to engage and secure to a movable element and to pivot about an axis of rotation defined by a hinge pin passing through at least one bore of the first hinge element and at least one bore of the second hinge element; and a first shape memory alloy element disposed coaxially within a bore of the hinge pin; a first heating element disposed coaxially within the bore of the hinge pin and configured to heat the first shape memory alloy element, wherein the hinge pin includes a first flange configured to engage the first hinge element; and a second flange configured to engage the second hinge element.