RESEARCH ON THE OVERALL DESIGN OF A HIGH-SPEED MORPHING UAV

Due to its broad application prospects in the military and civilian fields, air-launch high-speed aircraft is an important direction for the development of high-speed aircraft in the future. However, air-launch supersonic vehicles face the characteristics of limited volume, small lift-to-drag ratio, difficult trimming, and poor handling characteristics. A supersonic vehicle with morphing wing can flexibly change its aerodynamic shape according to different flight environments, which can improve the weakness of supersonic flight. This paper takes the air-launch high-speed aircraft with the outer wing folded as the research object and carries out the overall design research according to the proposed task requirements. The tailless aerodynamic layout combined with the strake wing and the multi-section swept wing was proposed. Aiming at the difficult problem of longitudinal moment trimming, a combined analysis method of pressure center position and pressure map is proposed. The research results show that the aircraft designed in this study has good aerodynamic performance in different speed domains, and it can maintain the longitudinal moment trim at the cruise angle of attack(AOA).