Design and Analysis of a High Aspect Ratio Biomimetic Folding Wing Scheme

The folding and unfolding dimensions of folding wings are crucial to the storage volume and flight performance of aircraft. In order to the wings in a limited space and achieve a high aspect ratio after deployment, a double-joint folding wing scheme based on bird wing configuration is proposed, with a shoulder joint hinge folding at the wing root and an elbow joint hinge folding in the middle of the folding wing. Through analytical geometry calculation, the geometric modeling calculation of the shoulder joint axis and elbow joint axis of the folding wing is analyzed. Based on its structure and working principle, dynamic simulation is performed to study the influence of inner and outer torsion springs on the unfolding process of the folding wing under different torsional stiffness. The simulation results show that the folding wing responds quickly, the unfolding locking is reliable, and the positioning is accurate. There is no interference during the folding process. The results demonstrate the feasibility and effectiveness of the proposed folding wing scheme, which is expected to have broad application prospects in the field of aviation engineering.