• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (9): 1-8.doi: 10.3901/JME.2020.09.001

• 机构学及机器人 •    下一篇

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形状记忆索网结构型面精度优化设计

潘逢群1, 蒋翔俊1, 范叶森2, 李智1, 巴静静1   

  1. 1. 西安电子科技大学电子装备结构教育部重点实验室 西安 710071;
    2. 西安空间无线电技术研究所 西安 710100
  • 收稿日期:2019-05-25 修回日期:2019-10-14 出版日期:2020-05-05 发布日期:2020-05-29
  • 通讯作者: 蒋翔俊(通信作者),男,1979年出生,博士,硕士研究生导师。主要研究方向为智能材料与结构设计。E-mail:xjjiang@xidian.edu.cn
  • 作者简介:潘逢群,女,1980年出生,博士研究生。主要研究方向为智能材料与大型天线优化设计。E-mail:fqpan@stu.xidian.edu.cn
  • 基金资助:
    国家自然科学基金(51775406,51675398)、陕西省自然科学基金(2017JM5035)和中央高校基本科研业务费专项资金(JB180412)资助项目。

Optimization Design of Structural Surface Precision of Shape Memory Cable Mesh

PAN Fengqun1, JIANG Xiangjun1, FAN Yesen2, LI Zhi1, BA Jingjing1   

  1. 1. Key Laboratory of Electronic Equipment Structure Design of Ministry of Education, Xidian University, Xi'an 710071;
    2. Xi'an Institute of Space Radio Technology, Xi'an 710100
  • Received:2019-05-25 Revised:2019-10-14 Online:2020-05-05 Published:2020-05-29

摘要: 大型周边桁架可展开天线的索网结构随卫星运动过程中长期受到太阳和行星的热辐射,会产生较大的热变形及力学松弛,从而导致天线性能衰退。以索网结构型面精度为目标,提出形状记忆合金和索网结构集成优化的设计方法,利用形状记忆拉索的形状记忆效应提高索网天线的型面精度。建立了形状记忆索网结构几何非线性有限元分析模型,采取型面精度主动调节策略,计算拉索的预张力,对温度影响下的型面变形进行主动优化计算。研究结果表明,合理选择形状记忆拉索的材料与结构参数,可以明显改善形状记忆索网结构的型面精度,实现索网结构天线的在轨保形设计。最后通过一个数值算例验证了该方法的可行性。

关键词: 形状记忆合金, 索网结构, 主动控制, 型面调整

Abstract: The cable mesh of the large circumjacent truss deployable antenna has been subjected to heat radiation from the sun and planets for a long period of time with the satellite movement, which will produce greater thermal deformation and mechanical relaxation, resulting in a decline in the performance of the antenna. Aiming at the precision of cable mesh structures, a designed method for structural integration optimization of shape memory alloy and cable mesh structure is proposed, improving the surface precision of cable antenna by using shape memory effect of shape memory cable. A geometric nonlinear finite element analysis model of the shape memory cable mesh structure is established, the pretension of the cable are calculated and an active adjustment strategy is adopted to optimize the deformation of the surface under the influence of temperature. The results show that reasonable selection of the parameters of shape memory alloy can obviously improve the surface accuracy of shape memory cable structure and realize the on-orbit shape preservation of large deployable antennas. A numerical example is presented to demonstrate the feasibility of the method.

Key words: shape memory alloy, cable mesh structures, active control, shape adjustment

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