|Table of Contents|

Dynamics model of airdrop process for air transportation cargo(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2016年02期
Page:
125-131
Research Field:
交通运输规划与管理
Publishing date:

Info

Title:
Dynamics model of airdrop process for air transportation cargo
Author(s):
SUN Xiu-xia1;  XU Guang-zhi1; 2;  LIU Ri1;  DONG Wen-han1;  QI Peng-chun2
1. School of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi’an 710038, Shaanxi, China; 2. The 94106 Troops of Chinese PLA, Xi’an 710613, Shaanxi, China
Keywords:
transport aircraft;  air transportation cargo;  airdrop;  dynamic characteristic;  separated-body modeling;  dynamic response;  extraction parachute;  rigid body;  model error
PACS:
V217
DOI:
-
Abstract:
In view of the status that the modeling condition of transport aircraft dynamic model in airdrop process for air transportation cargo was too much simplified, which was far away from the real airdrop project, the current airdrop process dynamic models and their applicabilities were systematic researched, and a separated-body modeling method was established. The forces of airdrop cargoes and aircraft were respectively analyzed without attention on the centroid of cargoes and aircraft, which simplified the modeling process and benefited the qualitative analysis of mechanism of the cargoes to the aircraft. In simulation experiment, the reasonability of dynamic model was verified by using the data of a certain-type transport aircraft. In order to verify the irrationality of small disturbance linearization of aerodynamic parameters, the aerodynamic parameters were processed through 3 modes, the corresponding curves of AOA were comparative analyzed. Under the conditions of different support forces, the application points of traction force, guide models, traction force angle models, and the loading positions of cargo, the built dynamic model of airdrop process was quantitative analyzed and compared with existed models. Simulation result shows that with the assumed conditions including the small disturbance linearization of aerodynamic parameters, assuming the cargoes with known motion law as particles, and ignoring the cabin angle, large model errors are introduced. In the missions of big traction ratio and heavy weight airdrop, the influence of the value and direction of traction force on the airdrop dynamic response should be considered. Furthermore, it is significant to install the cargoes near the cabin door of aircraft, which can shorten the moving time of cargoes and reduce the amplitude of interference torque. 9 figs, 24 refs.

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Last Update: 2016-04-20