Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
757220 | Chinese Journal of Aeronautics | 2016 | 12 Pages |
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.