期刊
JOURNAL OF AIRCRAFT
卷 -, 期 -, 页码 -出版社
AMER INST AERONAUTICS ASTRONAUTICS
DOI: 10.2514/1.C037390
关键词
Aeroelastic Stability; Actuators; Cessna Citation X; High Aspect Ratio Wing; Pressure-Actuated Cellular Structure; Mechanism Stiffnesses; Load Alleviation Control; Adaptive Compliant Wing; Morphing Wing; Wingtip Device
This study verifies the feasibility of the actuated adaptive wingtip concept through aeroelastic analysis and shows that the pressure-actuated cellular structures (PACS) made from glass-fiber-reinforced plastic can bear the loads acting on the wingtips of a Cessna Citation X. The adaptive-stiffness hinge reduces the wing root bending moment and maintains the wing's stability in flight.
Folding wingtips address the challenges posed by high-aspect-ratio wings, such as airport conformity and increased wing root bending moment. Actuated adaptive wingtips extend the functionalities of folding wingtips by using a stiffness-adaptive aeroelastic hinge that is actively adjustable in flight. The objective of this paper is the aeroelastic analysis of a wing equipped with an adaptive-stiffness hinge. While the structural design of the wingtip actuator based on pressure-actuated cellular structures (PACS) was developed in a previous study, in this study the authors verify the concept of actuated adaptive wingtips through aeroelastic analysis. This study shows that the investigated PACS actuator, structurally designed from glass-fiber-reinforced plastic, is capable of bearing the loads acting on the wingtips of a Cessna Citation X. The adaptive-stiffness hinge, positioned between 86.7 and 91.2% of the semispan, reduces the wing root bending moment by up to 7.8% in a 2.5g maneuver load case, while keeping the wing straight in cruise. A further increase in load alleviation potential can be achieved in the future by extending the actuator's operating envelope and thus increasing its load-bearing capacity. The functional verification of the actuated adaptive wingtip concept by means of aeroelastic analysis forms the basis for the manufacturing and testing of a functional prototype.
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