摘要
超大口径空间载荷天线是未来空间可展机构发展的重要方向之一,而当前典型的天线构型方式很难同时兼顾其拓展性与折展比需求。为此,本文提出了一种由多周边桁架式模块并联组网的强拓展、超高折展比载荷天线设计方案,开展了运动学性能研究与模态分析,并进一步借助试验验证其折展性能。首先,提出了逆向生成的二层拓扑构型设计与改进的基于Denavit-Hartenberg(D-H)法的划分方法,完成了天线的组网与构型设计;其次,基于旋量理论和图论对天线进行机构拓扑分析与展开过程自由度分析,验证了机构设计的合理性;最后,基于理论推导与仿真,结合样机试验,对所设计天线的运动学性能、动力学性能与展开特性进行了进一步研究验证。研究表明:提出的组网方式可满足天线强拓展、超高折展比要求下的组网需求,所设计的折展机构具有良好的可展性能与运动学特性。研究结果为超大口径载荷天线折展机构设计和理论分析提供了相应方法。
Ultralarge deployable antennas are one of the important directions for the future development of space payload mechanisms.However,the existing antenna configurations are difficult to simultaneously meet the requirements of both expandability and folding ratio.Therefore,a design scheme for deployable antennas with strong expansion,ultrahigh folding ratio,and multiple hoop truss modules grouped in parallel is proposed.The kinematic performance is investigated,a modal analysis is carried out,and the folding performance is verified with the help of tests.First,a twolayer topology configuration design based on inverse generation and an improved Denavit-Hartenberg(D-H)method for partitioning are proposed to complete the antenna grouping and configuration design.Then,the topology analysis of the antenna and the analysis of the degrees of freedom of the unfolding process are carried out based on the screw theory and graph theory to verify the rationality of the design.Finally,based on the theoretical derivation and simulation,along with the prototype tests,the kinematics and folding characteristics of the antenna are investigated and verified.The results show that the proposed grouping method can meet the requirements of strong expansion and ultra-high folding ratio,and the designed space deployable mechanism has good deployable performance and kinematic characteristics.The research results provide a method for the design and theoretical analysis of deployable mechanisms for ultra-large deployable antennas.
作者
薛宁
陈晓峰
郑光
陈传志
陈金宝
XUE Ning;CHEN Xiaofeng;ZHENG Guang;CHEN Chuanzhi;CHEN Jinbao(National Key Laboratory of Aerospace Mechanism,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,Jiangsu,China;Shanghai Aerospace Systems Engineering Institute,Shanghai 201109,China;Key Laboratory of Impact and Safety Engineering,Ningbo University,Ningbo 315211,Zhejiang,China)
出处
《上海航天(中英文)》
2025年第3期61-71,共11页
Aerospace Shanghai(Chinese&English)
基金
国家自然科学基金资助项目(52275113)
上海航天科技创新基金资助项目(SAST2021-017)。
关键词
可展开天线
机构设计
拓扑构型
螺旋理论
运动学分析
deployable antenna
mechanism design
topology configuration
screw theory
kinematic analysis
