• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (15): 129-137.doi: 10.3901/JME.2020.15.129

• 机器人及机构学 • 上一篇    下一篇

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空间可展开三棱柱伸展臂设计与优化

高明星, 刘荣强, 李冰岩, 郭宏伟, 邓宗全   

  1. 哈尔滨工业大学机器人技术与系统国家重点实验室 哈尔滨 150001
  • 收稿日期:2019-08-30 修回日期:2020-03-30 出版日期:2020-08-05 发布日期:2020-10-19
  • 通讯作者: 刘荣强(通信作者),男,1965年出生,博士,教授,博士研究生导师。主要研究方向为可展机构设计与控制、空间机械臂理论与应用和月球探测车关键技术。E-mail:liurq@hit.edu.cn
  • 作者简介:高明星,男,1991年出生,博士研究生。主要研究方向为空间可展开伸展臂及空间稳定性分析。E-mail:gaomx_hit@163.com
  • 基金资助:
    国家自然科学基金资助项目(51575119,51675114)。

Design and Optimization of Space Deployable Tri-prism Mast

GAO Mingxing, LIU Rongqiang, LI Bingyan, GUO Hongwei, DENG Zongquan   

  1. State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001
  • Received:2019-08-30 Revised:2020-03-30 Online:2020-08-05 Published:2020-10-19

摘要: 空间伸展臂作为空间折展机构中形式最丰富、研究最早、应用最广泛的一维空间折展机构,其主要作用是展开柔性太阳能帆板,支撑网状天线、合成孔径雷达、太空望远镜等。以三棱柱式伸展臂为研究对象,对伸展臂的展开方式和几何参数进行设计分析。基于几何非线性有限元理论,建立含空间桁架及预应力绳索的可展开伸展臂单元模型,然后建立含多可展开单元的大型伸展臂的几何非线性动力学模型。通过Matlab编程计算伸展臂的基频,得到影响伸展臂基频的关键因素,并以伸展臂的基频为优化目标,质量为约束条件,采用遗传算法对伸展臂进行优化设计。研制可展开三棱柱伸展臂样机,对伸展臂进行折展功能及参数优化设计验证试验。结果表明所设计的三棱柱伸展臂可顺利折展,所做的优化设计有效可行。通过该方法可以对特定任务需要的伸展臂进行优化设计,在满足约束条件的情况下,达到基频最高,对伸展臂的设计提供参考。

关键词: 三棱柱, 伸展臂, 非线性, 参数优化, 试验验证

Abstract: The space deployable mast, as the most diversified, earliest studied and most widely used one-dimensional space folding mechanism, is mainly used to drive flexible solar panels, support mesh antenna, synthetic aperture radar, space telescope and so on. Taking the tri-prism mast as the research object, the design and analysis of its deployed mode and geometric parameters are carried out. The model of deployable unit consist of space truss and prestressed rope is established, based on the geometric nonlinear finite element theory, and a geometric nonlinear dynamic model of a large deployable mast with multiple deployable units is established. The fundamental frequency of the deployable mast is calculated by Matlab programming, and the key factors affecting the fundamental frequency are obtained, further more, the genetic algorithm is used to optimize the design of the deployable mast, taking the fundamental frequency as the optimization target and the quality as the constraint condition. A prototype of tri-prism deployable mast is developed to verify the folding function and parameter optimization, the results show that the tri-prism mast can be folded smoothly and the optimized design is effective and feasible. This method can optimize the design of the deployable mast for specific tasks, and maximize fundamental frequency when the constraint conditions are satisfied, which providing a reference for the design of the deployable mast.

Key words: tri-prism, mast, nonlinear, parameter optimization, experimental verification

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