航空运输物资空投过程动力学模型

孙秀霞; 徐光智; 刘日; 董文瀚; 戚鹏春

doi:10.19818/j.cnki.1671-1637.2016.02.015

航空运输物资空投过程动力学模型

doi: 10.19818/j.cnki.1671-1637.2016.02.015

孙秀霞^1,,
徐光智^{1, 2},
刘日¹,
董文瀚¹,
戚鹏春²

1.
空军工程大学航空航天工程学院，陕西西安 710038
2.
中国人民解放军94106部队，陕西西安 710613

基金项目:

国家自然科学基金项目 61273141

航空科学基金资助项目 20141396012

详细信息

作者简介:
孙秀霞(1962-), 女, 山东潍坊人, 空军工程大学教授, 工学博士, 从事现代控制理论与鲁棒控制研究

中图分类号: V217
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- 被引次数: 0
出版历程
- 收稿日期: 2015-12-25
- 刊出日期: 2016-04-25

Dynamics model of airdrop process for air transportation cargo

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

More Information

Author Bio:
SUN Xiu-xia(1962-), female, professor, PhD, +86-29-84787726, gcxysxx@126.com

Article Text (Baidu Translation)

摘要

摘要: 针对当前航空物资空投过程的运输机动力学建模条件过于简化、严重脱离空投过程实际的现状, 研究了现有空投过程动力学模型的适用性, 确立了分离体建模的方法。在无需分析货物与飞机整体的质心变化的情况下, 分别以空投物资与飞机为对象进行受力分析, 简化了建模过程且有利于定性分析货物对飞机的作用过程。为验证动力学模型的合理性, 使用某型运输机数据进行了仿真试验。为验证空投过程中气动参数小扰动线性化的不合理性, 通过3种模式对气动参数进行处理, 对比分析了迎角响应曲线。对不同支持力、牵引力作用点、导轨模型、牵引力夹角模型、货物装载位置等条件下的空投过程运动学模型进行了量化分析, 并与现有模型进行对比。仿真结果表明: 气动参数小扰动线性化、视货物为运动规律已知的质点以及忽略舱内地板角等苛刻假设条件将导致较大的模型误差; 在进行大牵引比、大质量货物空投时, 应综合考虑牵引力数值与方向对空投动态响应的影响, 并尽量将货物安装在飞机舱门附近, 以缩短货物在舱内的运动时间, 降低干扰力矩幅值。
- 运输机 /
- 航空运输物资 /
- 空投 /
- 动力学特性 /
- 分离体建模 /
- 动态响应 /
- 牵引伞 /
- 刚体 /
- 模型误差
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 bigtraction 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.
- transport aircraft /
- air transportation cargo /
- airdrop /
- dynamic characteristic /
- separated-body modeling /
- dynamic response /
- extraction parachute /
- rigid body /
- model error

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图 1 坐标系定义

Figure 1. Definition of coordinates

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图 2 牵引阶段货物受力分析

Figure 2. Force analysis of cargo at traction stage

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图 3 不同气动参数处理模式的迎角响应曲线

Figure 3. Corresponding curves of AOA with different aerodynamic parameters processing modes

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图 4 建立模型与模型1的迎角响应曲线

Figure 4. Corresponding curves of AOA of built model and model 1

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图 5 不同支持力的迎角响应曲线

Figure 5. Corresponding curves of AOA with different support forces

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图 6 不同牵引力作用点的迎角响应曲线

Figure 6. Corresponding curves of AOA with different application points of traction force

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图 7 不同导轨模型的迎角响应曲线

Figure 7. Corresponding curves of AOA with different guide models

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图 8 不同牵引力夹角模型的迎角响应曲线

Figure 8. Corresponding curves of AOA with different traction force angle models

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图 9 不同货物装载位置的迎角响应曲线

Figure 9. Corresponding curves of AOA with different loading positions of cargo

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