Kinematics and dynamics characteristics of a double-ring truss deployable antenna mechanism based on triangular prism deployable unit

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2024-10-22 DOI:10.1016/j.tws.2024.112608

Bo Han , Yuanzhi Zhou , Meng Han , Xiaoyu Hu , Yundou Xu , Jiantao Yao

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Abstract

In order to effectively improve the single-ring truss deployable antenna mechanism due to the large aperture caused by the problem with low structural strength and low-profile accuracy, a series of double-ring truss deployable antenna mechanisms (DRTDAM) are proposed with constant height during folding and deployment process. First, a variety of DRTDAMs are proposed based on tetrahedral units and their topologies are analyzed. Secondly, degree-of-freedom (DOF) characteristics of DRTDAM proposed in this paper are analyzed based on the screw theory and screw-constrained topological graphs and based on this, the kinematic characteristics of DRTDAM is investigated. Thirdly, the dynamics of the whole DRTDAM is built with Newton-Euler equations of multi-rigid body system. Finally, the correctness of above analysis is verified through dynamics analysis software ADAMS and numerical analysis software MATLAB, and the principle prototype is produced to verify the correctness of DOF analysis. The mechanism proposed in this paper enriches the configuration of DRTDAM, and the process of kinematic characterization method is clear and simple, which is meaningful for the research in space complex mechanism.

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基于三角棱柱可展开单元的双环桁架可展开天线机构的运动学和动力学特性

为了有效改善单环桁架可展开天线机构因大孔径造成的结构强度低、外形精度低等问题，提出了一系列在折叠和展开过程中高度不变的双环桁架可展开天线机构（DRTDAM）。首先，提出了多种基于四面体单元的 DRTDAM，并对其拓扑结构进行了分析。其次，基于螺钉理论和螺钉约束拓扑图分析了本文提出的 DRTDAM 的自由度（DOF）特性，并在此基础上研究了 DRTDAM 的运动学特性。第三，利用多刚体系统的牛顿-欧拉方程建立了整个 DRTDAM 的动力学模型。最后，通过动力学分析软件 ADAMS 和数值分析软件 MATLAB 验证了上述分析的正确性，并制作了原理样机来验证 DOF 分析的正确性。本文提出的机构丰富了DRTDAM的配置，运动学表征方法过程清晰、简单，对空间复杂机构的研究具有重要意义。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.