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Compensation method for torsional stiffness of flexible wing

Morphing aircraft can sense load and attitude in real time and adaptively deformed according to different flight environments and tasks. They can achieve excellent performance in different environments and tasks. It is one of the main hotspots in recent years. However, the torsional stiffness of deformable wing structure with flexible skin will be greatly reduced, so the wing is prone to torsion during flight, which is not conducive to flight. In this paper, a stiffness compensate device is proposed. When the wing is subjected to torque, the rotating torque is transmitted to the stiffness compensation device, which is transformed and transmitted inside the device, and finally balanced by the spring inside the device, so as to compensate for the reduced torsional stiffness of the wing due to the use of flexible skin and increase the torsional resistance of the wing.The mechanical properties of the device are studied by theoretical analysis and a case is analyzed. The ability of the device to improve the torsional stiffness of the wing and its influencing factors are analyzed in this paper. The feasibility of the device is verified. The torsion resistance of the deformable wing can be greatly enhanced by this device.