Transactions of Nanjing University of Aeronautics & Astronautics
Dynamic Analysis and Safety Study of Catapult Launch for UAV
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Abstract:
Aiming at the selection of structural parameters and layout of the launch method， which are concerned by technicians at the initial stage of designing a new unmanned aerial vehicle （UAV）， a dynamic model of catapult launch is established by taking a UAV as the research object. On this basis， the influence of the main parameters such as the length of the launch bar and the installation point of the launch bar on the fuselage on safety of the UAV catapult launch is analyzed， and the simulation results show that increasing the length of the launch bar， decreasing the horizontal distance and increasing the vertical distance between the installation point and the centroid of the UAV can increase the pitch angle of the UAV， reduce the axial load and slow down the oscillation of the nose landing gear during the process of catapult launch， which can effectively improve safety of catapult launch. When the length of the launch bar is increased to 800 mm， the horizontal distance is decreased to 289 mm or the vertical distance is increased to 365 mm， there is a risk that the nose landing gear will leave the track surface in advance. When the horizontal distance is increased to 589 mm or the vertical distance is decreased to 265 mm， the sudden-extension of the nose landing gear will appear.
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This work was supported in part by the Fundamental Research Funds for the Central Universities （No.NT2022002）， the National Natural Science Foundation of China （No.52202441）， the Natural Science Foundation of Jiangsu Province （No.BK20220910）， and the National Defense Outstanding Youth Science Foundation （No.2018-JCJQ-ZQ-053）.
Clc Number:
V226
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