Abstract
The batch launch of small folding-wing UAVs by high altitude balloon at high altitude is a new technology in recent years. The wing deployment process at 20km altitude is analyzed, and mathematical model of the wing delivery is established. Using the multibody dynamics analysis software ADAMS simulate the wing deployment process in order to verify the correctness of the model established. Then, the impact of the wing with final velocity on the fuselage is analyzed, and an elastic locking mechanism is designed to reduce the impact. The analysis process provides a certain reference for the task design of balloon-UAVs and the folding mechanism analysis.
Highlights
The near space of 20km -100km is between the traditional aeronautical area and the space flight area [1]
The mission profile of the UAVs launch by high altitude balloon is shown in Folding wing UAV is the application of folding wing technology in UAV design process
Through the folding wings changes the dimension of the UAV, improving its storage, transportation, launch, recovery and aerodynamic performance[2], which is beneficial to saving space and increasing the number of UAVs carried in one time
Summary
The near space of 20km -100km is between the traditional aeronautical area and the space flight area [1]. Through the folding wings changes the dimension of the UAV, improving its storage, transportation, launch, recovery and aerodynamic performance[2], which is beneficial to saving space and increasing the number of UAVs carried in one time. The research on folding wing UAV is mostly focused on the study of aerodynamic influence of the front and rear wing layout, or the aeroelastic flutter analysis during the folding and expanding process[3,4,5,6] .The study of dynamic analysis and return vibration of the wing process is less [7].The wing expansion performance is related to whether the UAV can fly normally after the launch. It is solved by ode function with the time chosen as the independent variable
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