| Citation: | ZHANG Zhao, PENG Yiming, ZHOU Fuliang, et al. Analysis and optimization of dynamic characteristics of air-cooled launcher for fold-rotor UAV[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(10): 1951-1959. doi: 10.13700/j.bh.1001-5965.2021.0059(in Chinese)
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In order to solve the coupling nonlinear dynamics problem of the mechanical system and pneumatic system in the process of a new air-cooled launch device, an analysis method and optimization design method for the air-cooled launching dynamic characteristics of folding-rotor unmanned aerial vehicle (UAV) were proposed to satisfy the requirements of its structural form and launching technology. Taking a folding-rotor UAV as the research object, the dynamics model of the compressed gas launch system of UAV was established based on co-simulation, and the test prototype of the cold air launch system was built, the compressed gas launch experiment was completed to verify the accuracy of the simulation model. The effect of the main system parameters of UAV and air-cooled launcher on the dynamic performance of UAV launch is analyzed. Finally, the parameter optimization design is carried out for the system. Results show that the volume of the air cylinder and the inflation pressure are the key parameters influencing the dynamic characteristics of the UAV air conditioning launch, with air cylinder volume and air pressure, the largest launch speed and overload increasing, air cylinder volume increased from 15 L to 30 L, the largest launch speed increased by 52.7%, the largest launch overload grew by 60.9%, were positively correlated; When the charging pressure increases from 0.4 MPa to 0.7 MPa, the maximum launch velocity increases by 50.5% and the maximum launch overload increases by 69.9%. The launch angle has little effect on UAV launch performance and can be ignored.
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