Kinematic and dynamic characteristics' analysis of a scissor multi-rod ring deployable mechanism

IF 1 4区工程技术 Q4 ENGINEERING, MECHANICAL Mechanical Sciences Pub Date : 2023-04-21 DOI:10.5194/ms-14-193-2023

Bo Han, Yuxian Yao, Yuanzhi Zhou, Yundou Xu, Jiantao Yao, Yongsheng Zhao

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Abstract

Abstract. In this paper, the authors developed a double-layer ring truss deployable antenna mechanism (RTDAM) based on a scissor unit, which can be used as the deployment and support mechanism in large-aperture satellite antenna. Firstly, three configuration state diagrams of the scissor multi-rod RTDAM were displayed: folded, half-deployed, and deployed. The mechanism was decomposed into a closed-ring deployable mechanism unit and several non-closed-ring deployable mechanism units. The screw constraint topological diagram of the closed-ring deployable mechanism unit was drawn, and the number of degrees of freedom (DOFs) was calculated via the screw theory method. Then, the expressions for screw velocity and screw acceleration of each component in the resultant mechanism were analyzed, calculated, and solved. The screw velocity and screw acceleration of each component were obtained, and the six-dimensional velocity and acceleration of each component were obtained through screw conversion and recursion. Finally, using the Newton–Euler equation and virtual work principle, the dynamic equation of the RTDAM with an integral scissor multi-rod ring truss mechanism was established, and the theoretical analysis was validated through numerical calculation and simulation results. The RTDAM of the scissor multi-rod ring truss proposed in this paper has a single DOF and can be well applied to the large-aperture satellite antenna.

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剪刀式多杆环展开机构的运动学与动力学特性分析

摘要本文研制了一种基于剪刀单元的双层环桁架可展开天线机构(RTDAM)，可作为大口径卫星天线的展开和支撑机构。首先，给出了剪刀式多杆RTDAM的折叠、半展开和展开三种构型图。将该机构分解为一个闭合环展开机构单元和若干个非闭合环展开机构单元。绘制了闭环可展开机构单元的螺杆约束拓扑图，并利用螺杆理论方法计算了其自由度数。然后，对合成机构中各部件的螺杆速度和螺杆加速度表达式进行了分析、计算和求解。得到各部件的螺杆速度和螺杆加速度，通过螺杆转换和递推得到各部件的六维速度和加速度。最后，利用牛顿-欧拉方程和虚功原理，建立了带有整体剪叉式多杆环桁架机构的RTDAM动力学方程，并通过数值计算和仿真结果验证了理论分析。本文提出的剪刀式多杆环桁架的RTDAM具有单自由度，可以很好地应用于大口径卫星天线。

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来源期刊

Mechanical Sciences ENGINEERING, MECHANICAL-

CiteScore

2.20

自引率

7.10%

发文量

审稿时长

29 weeks

期刊介绍： The journal Mechanical Sciences (MS) is an international forum for the dissemination of original contributions in the field of theoretical and applied mechanics. Its main ambition is to provide a platform for young researchers to build up a portfolio of high-quality peer-reviewed journal articles. To this end we employ an open-access publication model with moderate page charges, aiming for fast publication and great citation opportunities. A large board of reputable editors makes this possible. The journal will also publish special issues dealing with the current state of the art and future research directions in mechanical sciences. While in-depth research articles are preferred, review articles and short communications will also be considered. We intend and believe to provide a means of publication which complements established journals in the field.