摘要
翼伞操纵力是精确空投系统伺服电机选取的关键指标。本文提出了一种基于任意拉格朗日欧拉(Arbitrary Lagrange Euler,ALE)的翼伞操纵力计算方法,以文献翼伞为例进行了不同操纵行程下操纵力计算,计算结果与试验结果规律一致,操纵力误差<5%。在此基础上,探究了空投工况下操纵力的耦合机理及动态变化规律,发现操纵绳下拉至目标操纵行程瞬间,操纵力最大,之后逐渐变小直至稳定。并考察了操纵参数对操纵力的影响,结果表明:操纵速率一定,随着操纵行程增加,最大操纵力及稳态操纵力增大,但增长率均减小;操纵行程一定,随着操纵速率增加,最大操纵力增大,稳态操纵力几乎不变;相比于操纵行程,操纵速率对最大操纵力的影响能力较弱。本文研究成果可为翼伞操纵绳设计及伺服电机选择提供理论依据。
The control force of the parafoil represents a crucial indicator in the selection of servo motors for precision airdrop systems.This paper proposes an Arbitrary Lagrange Euler(ALE)-based method for calculating the control force of the parafoil.The method is demonstrated through calculations of the control force within different control strokes.The calculated results are consistent with the experimental result,with the error being less than 5%.On this basis,the coupling mechanism and dynamic change law of the control force under the airdrop condition are investi⁃gated.It is found that the control force reaches the maximum when the control rope is pulled down to the target control stroke,and then gradually decreases until it reaches a steady state.The influence of control parameters on control force is examined.The findings indicate that when the control speed is fixed,an increase in control stroke results in a rise in both maximum control force and steady-state control force,but a decline in the control force rising rate.When the control stroke is held constant,an increase in control speed results in an increase in maximum control force,while the steady-state control force remains almost unchanged.In comparison to the control stroke,the control speed has less influence on the maximum control force.The findings of this study can provide a theoretical foundation for the de⁃sign of the parafoil control rope and the selection of servo motor.
作者
曹皓然
黄立家
李茜茜
余莉
CAO Haoran;HUANG Lijia;LI Xixi;YU Li(College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;AVIC Hongguang Airborne Equipment Co.,Nanjing 210012,China)
出处
《航空学报》
北大核心
2025年第1期141-151,共11页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(11972192)。
关键词
翼伞
ALE方法
流固耦合
操纵力
操纵行程
操纵速率
parafoil
Arbitrary Lagrange Euler(ALE)method
fluid structure interaction
control force
control stroke
control speed
作者简介
通信作者:余莉.E-mail:yuli_happy@nuaa.edu.cn。
