超大口径环形天线包带展开过程动力学仿真  

Dynamic simulation of the deployment process of super large loop antenna belt

作　　者：胡建峰[1] 杨军刚[1] 肖勇 万小平 冯涛 王勇 郑冰 HU Jianfeng;YANG Jungang;XIAO Yong;WAN Xiaoping;FENG Tao;WANG Yong;ZHENG Bing(China Academy of Space Technology(Xi’an),Xi’an 710100,China;Xi’an Jiaye Aviation Science&Technology Co.,Ltd.,Xi’an 710089,China)

机构地区：[1]中国空间技术研究院西安分院,西安710100 [2]西安嘉业航空科技有限公司,西安710089

出　　处：《中国空间科学技术》2021年第5期50-56,共7页Chinese Space Science and Technology

基　　金：国家自然科学基金(U1537213)。

摘　　要：中间柔性包带是环形可展开天线的重要组成部分。中间包带拔销器解锁后,复材包带与环形桁架同步展开。因复材包带柔性较强,它会绕根部固定端进行回弹,因此展开过程存在金属接头和桁架上复材薄壁管件碰撞风险。随着天线口径增大,该风险会持续增大。基于柔性多体动力学理论对超大型口径环形可展开天线包带展开过程进行动力学建模仿真,并在此基础上分析得出包带展开过程金属接头到环形桁架最小距离主要和复材包带阻尼率以及桁架预展速度相关。通过进一步研究发现:复材包带阻尼率越高,展开过程金属接头到环形桁架最小距离越大;桁架预展速度越快,展开过程金属接头到环形桁架最小距离越小。此外,对逆止回弹机构失效这一在轨极端条件下包带展开过程进行建模仿真,分析得出包带在该条件下展开过程金属接头到环形桁架最小距离变化规律。该研究可为超大口径环形天线结构优化设计及包带在轨展开预示提供依据。The middle flexible belt is an important part of the loop deployable antenna.With the explosion of retracting actuator,the composite belt and the loop truss are expanded synchronously.Due to the strong flexibility of the composite belt,it will rebound around the fixed end of the root.Therefore,there is a risk of collision between the metal joint and the composite thin-walled pipe on the truss during the deployment process.As the antenna diameter increases,the risk will continue to increase.Based on the flexible multibody dynamics theory,the dynamic modeling and simulation of the belt deployment process of the super large loop antenna were carried out.On this basis,the minimum distance between the metal joint and the loop truss during deployment process was mainly related to belt damping rate and the truss preview speed.After further research,it was found that the bigger the damping rate of the composite belt,the longer the minimum distance between the metal joint and the loop truss during deployment,and that the faster the truss preview speed,the shorter the minimum distance between the metal joint and the loop truss during deployment.In addition,the law of change of the minimum distance between the metal joint and the loop truss in the process of deployment under the condition of failure of ratchet device in space was obtained.This research can provide a basis for the optimal design of the super loop antenna structure and the prediction of the belt deployment in space.

关 键 词：超大口径环形天线 包带动力学建模仿真 阻尼率 预展速度 在轨预示 

分 类 号：TB122[理学—工程力学]