Aircraft with changeable wing shape

Specific embodiment 1: This embodiment is described with reference to Figs. 1 and 2. This embodiment consists of a fuselage 1 and two wings 2; the two wings 2 are symmetrically arranged on the left and right sides of the fuselage 1. A wing 2 consists of a fixed wing 3, a sliding wing 4, a shape memory alloy rod 5, a cylinder 6, and a pulley 7. One end of the fixed wing 3 is fixed to the fuselage 1, and the skeleton of the wing 3 is fixed A cylinder 6 and a shape memory alloy rod 5 fixed to the cylinder 6 are arranged along the inner edge of the fixed wing 3 in the direction from the tail end to the head end. The outer surface of the cylinder 6 is provided along the length direction of the cylinder 6. Spiral groove 8, the sliding wing 4 is installed in the frame of the fixed wing 3, the sliding wing 4 is equipped with a pulley 7 at the head end, and the pulley 7 is installed in the spiral groove 8 to fix The materials used for the wing 3 and the sliding wing 4 are the same as those of the existing wing; the heating method of the shape memory alloy rod 5 is direct electric heating or heating by resistance wire.

Specific embodiment 2: This embodiment will be described with reference to FIGS. 1 and 2. The shape memory alloy rod 5 of this embodiment is a TiNi shape memory alloy rod, a Cu-Zn shape memory alloy rod, a Cu-Al-Ni shape memory alloy rod, One of Cu-Sn shape memory alloy rods, Mn-Cu shape memory alloy rods, Fe-Pt shape memory alloy rods or Fe-Mn-Si shape memory alloy rods. The shape memory alloy rod is subjected to external torsion force (the ambient temperature is lower than the martensite transformation temperature of the shape memory alloy), the shape memory alloy rod produces a certain torsional deformation (torsional strain is less than 10%), and then the shape memory alloy rod is heated , The shape memory alloy rod undergoes transformation from austenite to martensite, and the torsional deformation returns to its original shape. With this arrangement, the above shape memory alloy rod has the characteristics of large torque, large reversible torsion angle, fast response speed, and high repeatability of thermo-mechanical cycles. In addition, if energized heating is used, the above shape memory alloy rods also have electrical response characteristics, which is convenient for controlling the movement of the system. Other components and connection relationships are the same as in the first embodiment.