Research On Individual Soldier Compressed Air UAV Catapult

Individual weapon has the characteristics of simple structure,simple operation,can be launched in limited space,flexible operation and so on.It is an effective weapon for short range operations and special terrain operations in modern war.The traditional individual weapon is launched by firework,which has obvious launch characteristics and is easy to be exposed.This paper studies a compressed air ejection device and a spring ejection device respectively.The compressed air catapult device can catapult the flapping wing UAV and reach the expected muzzle velocity.It has the advantages of no light,no smoke,no heat,low noise,good concealability and so on.It is of great significance to ensure the survival ability of the shooter and realize the "hidden" launch.The compressed air ejection device designed in this paper can catapult the flapping wing UAV with foldable wings out of the barrel and get the expected initial velocity.After ejecting out of the barrel,the flapping wing UAV can successfully open its wings to complete follow-up tasks such as reconnaissance and monitoring.The main work of this paper is as follows:(1)According to the background of the project,a compressed air ejection device of the catapult flapping wing UAV was designed.The internal ballistic design of the compressed air ejection device was carried out in combination with the classical internal ballistic theory,and the internal ballistic model of the ejection system was established.(2)According to the internal ballistic design data,the specific structure of the compressed air ejection device is designed,and the important components of the ejection device are analyzed,and the strength of the main force structure is checked.(3)The principle of spring ejection device is introduced,a spring ejection device is designed,and Adams software is used for dynamic analysis of spring ejection device,spring ejection device prototype is made and performance test is carried out.(4)The simplified model of the compressed air ejection device and flapping wing UAV was established by using ANSYS AUTODYN software,and the fluid-structure coupling simulation analysis of the ejection system was carried out to obtain the internal ballistic performance data of the ejection system.(5)Combined with internal ballistic design and fluid-structure coupling analysis,two generations of individual soldier compressed air UAV catapult prototypes were made,and the performance test was carried out,and the theoretical derivation and simulation analysis results were compared to verify the feasibility of the compressed air catapult device.In the performance test,the designed spring ejection system has slow trigger mechanism response,poor reliability,and the unlocking mechanism produces stress concentration and is easy to break.Compared with the compressed air ejection,it has great disadvantages,but it also provides a certain reference for the UAV ejection.The designed compressed air ejection system can meet the launch requirements,and the launch process is stable,low noise,no light,smokeless,and can realize the "secret" launch.