SMAactuated Morphing Wing with Varying Spanwise Curvature and SweptAngle * In this paper, a new morphing wing mechanism with two degrees of freedom is presented, which can realize the varying spanwise curvature and swept angle of the wing. The wing consists of segmented beams, flexible hinges, and a SMA actuator. A theoretical model of hingexe2x80x99s compliance matrix is established based on linear elastic material and small displacement. A finite element analysis (FEA) is used to analyze the flexible hinge in order to produce the compliance matrix. The results validates the theoretical model. A heating method is developed to improve the output response of the SMAactuator. The presented mechanism is fabricated and the experimental results demonstrates the potential of this mechanism.

Design and Analysis of a Variablespan and Cambered Span Morphing Wing for UAV The variablespan and cambered span morphing wing for unmanned aerial vehicle (UAV) can greatly improve its flight efficiency. In this work, a new extendable and bendable morphing wing with double driving is designed. The morphing skeleton of wing is composed of the basic unit module which is sevenbar mechanism in series. The rubberfilled corrugated sandwich corrugated skin is designed according to the requirement of morphing skeleton. The kinematics model of morphing skeleton that is composed of three modules in series is established, then the kinematics analysis of morphing skeleton is carried out, at last the expressions of the deformed position and driving angle are obtained. In the case of the same wing span, the influence of different rod length ratio on the maximum extension length of the morphing wing is analyzed, and the influence of different driving speed on the maximum bending angle under the same rod length ratio is compared and analyzed.