Comprehensive optimization of a multi-modal morphing wing

Morphing wings can enable aircraft to have the advantages of a wide speed domain, wide airspace and a long voyage. However, it is difficult to make a balance between the characteristics of multi-modal shapes and high load-bearing capacity. A morphing wing is proposed in this article, which can achieve four morphing types in single actuation based on lockable joints. It also has continuous deformation to improve its aerodynamic performance. The design method and the working principle of the morphing wing are described. Moreover, a bar-beam coupling stiffness model is presented based on matrix displacement methods. The influence of lengths of specific links on the load-bearing capacity is analyzed. Based on the results of the motion optimization, a comprehensive dimension optimization of the morphing wing is carried out to improve its load-bearing performance.