剪叉伸缩竖杆式环形桁架机构设计与性能分析  

Design and performance analysis of scissors telescopic vertical rod hoop truss mechanism

作　　者：余力威 何柏岩[1] 聂锐[1] 范叶森[2] 马小飞[2] YU Liwei;HE Baiyan;NIE Rui;FAN Yesen;MA Xiaofei(School of Mechanical Engineering,Tianjin University,Tianjin 300354,China;Xi'an Institute of Space Radio Technology,Xi'an 710100,China)

机构地区：[1]天津大学机械工程学院,天津300354 [2]西安空间无线电技术研究所,西安710100

出　　处：《中国空间科学技术》2023年第1期119-128,共10页Chinese Space Science and Technology

基　　金：国家自然科学基金(52175027,52175242,51775369)。

摘　　要：空间可展开天线的展开平稳性是天线顺利展开的关键。天线的收展比是运载火箭空间配置的重要参考因素。为减小天线展开过程中的振动冲击,提高展开平稳性,降低空间可展天线收展比,梳理了可展开天线桁架机构的常见构型,提出一种剪叉伸缩竖杆式环形桁架机构,并详细介绍了该机构的基本单元及展开方式。对该机构的收展比进行具体分析,结果表明在相同口径和展开高度的情况下该机构的高径比比Astromesh天线桁架机构减小了35%左右。对该机构进行运动学和动力学建模,分析了机构展开平稳性,结果表明在相同大小驱动力作用下该机构的各节点加速度均方根是Astromesh天线桁架机构的30%左右,具有更好的展开平稳性。试制了缩比模型并进行了展开实验及相关参数测试,验证了机构设计的合理性及计算结果的准确性。The deployment smoothness is the key to the smooth deployment of space deployable antennas.The fold/deployment ratio of the antenna is a vital reference factor for the spatial configuration of launch vehicles.To reduce the vibration and shock during the deployment process, improve the deployment smoothness, and reduce the fold/deployment ratio, the common configurations of deployable antenna truss mechanism were combed.A kind of scissors telescopic vertical rod hoop truss mechanism was proposed, and the basic unit and deployable method were introduced in detail.A detailed analysis of the fold/deployment ratio shows that the height-to-diameter ratio of the mechanism was reduced by about 35% compared with the Astromesh antenna truss mechanism under the same caliber and deployment height.Through kinematics and dynamics modeling, the deployment smoothness of the mechanism was analyzed.The results indicate that under the same driving force, the root mean square value of the acceleration at each node is about 30% of the Astromesh antenna truss mechanism, with better deployment smoothness.A scaled model was developed.The experimental analysis and parameter test were carried out, demonstrating rationality of the designed mechanism and accuracy of the calculation results.

关 键 词：环形桁架 剪叉机构 动力学分析 平稳性 可展开结构 

分 类 号：V443.4[航空宇航科学与技术—飞行器设计]