Parachute dynamics and perturbation analysis of precision airdrop system

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Abstract

To analyze the parachute dynamics and stability characteristics of precision airdrop system, the fluid-structure interaction (FSI) dynamics coupling with the flight trajectory of a parachute-payload system is comprehensively predicted by numerical methods. The inflation behavior of a disk-gap-band parachute is specifically investigated using the arbitrary Lagrangian-Euler (ALE) penalty coupling method. With the available aerodynamic data obtained from the FSI simulation, a nine-degree-of-freedom (9DOF) dynamic model of a parachute-payload system is built and solved to simulate the descent trajectory of the multi-body dynamic system. Finally, a linear five-degree-of-freedom (5DOF) dynamic model is developed, the perturbation characteristics and the motion laws of the parachute and payload under a wind gust are analyzed by the linearization method and verified by a comparison with flight test data. The results of airdrop test demonstrate that our method can be further applied to the guidance and control of precision airdrop systems.

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APA

Gao, X., Zhang, Q., & Tang, Q. (2016). Parachute dynamics and perturbation analysis of precision airdrop system. Chinese Journal of Aeronautics, 29(3), 596–607. https://doi.org/10.1016/j.cja.2016.04.003

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