• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (5): 72-79.doi: 10.3901/JME.2020.05.072

• 航天重器——空间大型可展机构与装备专刊 • 上一篇    下一篇

空间可展开结构静力多稳态分析

陈聪聪1, 李团结1, 马小飞2   

  1. 1. 西安电子科技大学机电工程学院 西安 710071;
    2. 西安空间无线电技术研究所 西安 710100
  • 收稿日期:2019-03-24 修回日期:2019-08-05 出版日期:2020-03-05 发布日期:2020-04-23
  • 通讯作者: 李团结(通信作者),男,1972年出生,博士,教授,博士研究生导师。主要研究方向为空间可展结构与天线、智能机器人和电子装备机电热技术。E-mail:tjli888@126.com
  • 作者简介:陈聪聪,女,1993年出生,博士研究生。主要研究方向为空间可展结构与天线。E-mail:ccchen_1@stu.xidian.edu.cn;马小飞,男,1980年出生,研究员,博士研究生导师。主要研究方向为可展开天线。E-mail:maxf041600@sina.com
  • 基金资助:
    国家自然科学基金资助项目(51775403,U1537213)。

Static Multiple-stable-state Analysis of Deployable Structures with Clearance Joints

CHEN Congcong1, LI Tuanjie1, MA Xiaofei2   

  1. 1. School of Mechano-Electronic Engineering, Xidian University, Xi'an 710071;
    2. Xi'an Institute of Space Radio Technology, Xi'an 710100
  • Received:2019-03-24 Revised:2019-08-05 Online:2020-03-05 Published:2020-04-23

摘要: 受装配与展开需求的影响,空间可展开结构的铰链中普遍存在着间隙。空间可展开结构展开到位锁死后,由于铰间隙的存在,可展开结构在外载作用下的静力平衡位置不唯一,即存在静力多稳态现象。为了揭示静力多稳态现象的内在机理,以某伞状可展开天线为研究对象,利用无质量杆间隙模型对含间隙可展开结构进行静力学建模。分析了间隙尺寸、摩擦因数与杆长配置等对含间隙可展开结构静力平衡位置的影响规律。分析结果表明,间隙与摩擦是静力多稳态现象产生的原因;间隙尺寸越大,摩擦因数越大,含间隙可展开结构在特定外力下的静力平衡位置越多;不同位置的间隙与摩擦因数对静力多稳态现象的影响程度不同;杆长配置影响静力多稳态现象;通过施加合适的预紧力,可有效控制静力多稳态现象。

关键词: 空间可展开结构, 静力多稳态, 间隙铰, 伞天线, 无质量杆模型

Abstract: Clearances are widely existed in joints of space deployable structures for the needs of assembly and deployment. Because of the existence of clearance joints, after space deployable structures are locked in the deployed state, the position of the deployable structures is not unique under the action of external loads, that is, the static multiple-stable-state phenomenon. In order to reveal the intrinsic mechanism of static multiple-stable-state phenomenon, taking the deployable structure of an umbrella-shaped deployable antenna as an example, the static model of the deployable mechanism with clearance joints is established using the mass-less rod model. The influence of clearance size and friction coefficient on static equilibrium position of deployable structure with clearance joints is analyzed. The numerical results indicate that clearance and friction are the reasons of static multiple-stable-state phenomenon. The larger the clearance size is, and the larger the friction coefficient is, the more static equilibrium positions of deployable structures with clearance are. The influences of clearance and friction on static multiple-stable-state phenomenon differ by position. The phenomenon is also influenced by the collocation of bar lengths. The distribution of static equilibrium position can be effectively controlled by applying appropriate preloading forces.

Key words: space deployable structures, static multiple-stable-state phenomenon, clearance joints, umbrella shaped antenna, mass-less rod model

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