摩擦力对空间非导电绳系释放动力学的影响

doi:10.12382/bgxb.2022.0916

摘要/Abstract

摘要：

当前空间非导电绳系释放过程因摩擦力数据缺乏,导致释放动力学仿真结果不能有效反映真实情况。为此,基于绳系地面释放平台,开展非导电绳系释放摩擦力测量实验,研究了系绳材料、直径、缠绕方向和释放速度对系绳释放所受摩擦力的影响,阐明非导电绳系释放过程影响球形效应不稳定现象的主要因素,确定非导电绳系释放摩擦力与释放条件之间的定量关系。进一步建立考虑摩擦力的绳系释放动力学模型。仿真结果表明,非导电绳系释放摩擦力对释放过程影响较大,对于500m长的系绳,初始释放速度为2m/s,在未考虑释放摩擦力时,绳系释放完成时间与考虑摩擦力的实际情况相差约20%。

关键词: 空间绳系, 释放摩擦力, 地面实验, 释放速度, 动力学仿真

Abstract:

The simulation results of the deployment dynamics of non-conductive space tether are inconsistent with the actual situation due to the lack of deployment friction data. To solve this problem, the deployment friction measurement experiments of non-conductive space tether are conducted based on a ground tether deployment platform, the effects of different materials, diameters, winding direction, and deployment velocity of tether on the deployment friction are studied, the main factors affecting the “ball effect” unstable phenomenon during the deployment process are clarified, and the quantitative relationship between the deployment friction and the deployment conditions is determine. By further study of tether deployment dynamics simulation, it is found that deployment friction has a significant influence on the tether deployment: for a 500m long tether, the difference between the deployment duration without considering deployment friction and the deployment duration with considering deployment friction is about 20% at an initial deployment velocity of 2m/s.

Key words: space tether, deployment friction, ground experiment, deployment velocity, dynamics simulation

中图分类号:

梁福文, 苗龙, 田丰, 宋家辉, 白松, 何梓豪, 王宁飞. 摩擦力对空间非导电绳系释放动力学的影响[J]. 兵工学报, 2024, 45(4): 1158-1167.

LIANG Fuwen, MIAO Long, TIAN Feng, SONG Jiahui, BAI Song, HE Zihao, WANG Ningfei. Effect of Friction on Deployment Dynamics of Non-conductive Space Tether[J]. Acta Armamentarii, 2024, 45(4): 1158-1167.

图/表 15

图1 水平和垂直两种系绳出口方向的绳系释放平台示意图

Fig.1 Schematic diagram of ground tether deployment experimental platform

图2 绳系释放地面实验平台主要组成部分实物图

Fig.2 Composition of ground tether deployment experimental platform

图3 系绳释放所受摩擦力受力分析

Fig.3 Force analysis on tether deployment friction

图4 绳系释放中的球形效应[27]

Fig.4 Ball effect in the process of tether deployment[27]

图5 系绳在绳轴上两种缠绕方向设置

Fig.5 Different tether winding directions on tether spool

图6 不同材料的系绳释放过程

Fig.6 Deployment processes of tethers made of different materials

图7 不同直径系绳下释放摩擦力变化

Fig.7 Changes of deployment friction of tethers with different diameters

表1 不同系绳直径下绳系释放过程摩擦力数据统计

Table 1 Friction result statistics of tethers with different diameters

系绳直径/mm	摩擦力平均值/N	摩擦力标准差/N
2	0.615	0.084
3	2.846	0.274
4	7.424	0.676

图8 不同缠绕方向下绳系释放摩擦力变化

Fig.8 Change of deployment friction in different winding directions

表2 缠绕方向不同对绳系释放摩擦力数据统计

Table 2 Statistics of friction results in different winding directions

缠绕方向	摩擦力平均值/N	摩擦力标准差/N
正向	0.674	0.108
反向	0.663	0.115

图9 典型释放速度下的系绳所受摩擦力变化测量结果

Fig.9 Change of deployment friction under typical deployment velocities

图10 不同释放速度下释放摩擦力平均值变化情况

Fig.10 Change in the average value of deployment friction under different deployment velocities

图11 绳系释放动力学仿真模型示意图

Fig.11 Schematic diagram of tether deployment dynamics model

图12 释放摩擦力对绳系释放的影响

Fig.12 Effect of deployment friction on tether deployment

图13 释放摩擦力随速度变化的拐点对释放动力学的影响

Fig.13 Change of tether deployment dynamicseffected by the inflection point in the deployment friction curve

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