Parachute dynamics and perturbation analysis of precision airdrop system

详细信息    查看全文

• 作者：Xinglong Gao ^{18674853560@163.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Qingbin Zhang ^{qingbinzhang@sina.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Qiangang Tang ; ^{kdtqg@sina.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Airdrop system ; Flight dynamics ; Fluid&ndash ; structure interaction ; Parachute ; Perturbation analysis
• 刊名：Chinese Journal of Aeronautics
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：29
• 期：3
• 页码：596-607
• 全文大小：2364 K

文摘

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.