民用轻小型无人机跌落测试试验及损伤特性研究

In order to explore the drop damage characteristics of civil light and small unmanned aerial vehicles (UAVs), drop tests on two types of civil light and small UAVs were carried out to study the impact load, and the deformation modes during the falling from a certain height. The fall damage and load diversity caused by the structural differences of different types of UAVs were compared and analyzed. The results show that the effective landing gear buckling and deformation is able to achieve the effects of energy absorption and load reduction when the UAV adopts an integrated aluminum alloy landing gear, while the energy absorption effect of the embedded landing gear is relatively poor. When the multi-rotor UAVs fall in a vertical upright attitude, the damage is mainly concentrated on the landing gear, the arm and the bottom of the fuselage. In particular, the arm is at the risk of breaking at the root during the fall. The root structure of the UAVs arm should be appropriately optimized and strengthened. Compared with the built-in battery, the external snap-on battery may fly away from the body when subjected to an impact, and induce a secondary impact. The built-in batteries are safer than the external snap-on batteries.