Asynchronous deployment scheme and multibody modeling of a ring-truss mesh reflector antenna

IF 3.8 2区工程技术 Q1 ENGINEERING, MECHANICAL

Acta Mechanica Sinica Pub Date : 2024-11-13 DOI:10.1007/s10409-024-24147-x

Baiyan He (, ), Kangkang Li (, ), Lijun Jia (, ), Rui Nie (, ), Yesen Fan (, ), Guobiao Wang (, )

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引用次数: 0

Abstract

Mesh reflector antennas are the mainstream of large space-borne antennas, and the stretching of the truss achieves their deployment. Currently, the truss is commonly designed to be a single degree of freedom (DOF) deployable mechanism with synchronization constraints. However, each deployable unit’s drive distribution and resistance load are uneven, and the forced synchronization constraints lead to the flexible deformation of rods and difficulties in the deployment scheme design. This paper introduces an asynchronous deployment scheme with a multi-DOF closed-chain deployable truss. The DOF of the truss is calculated, and the kinematic and dynamic models are established, considering the truss’s and cable net’s real-time coupling. An integrated solving algorithm for implicit differential-algebraic equations is proposed to solve the dynamic models. A prototype of a six-unit antenna was fabricated, and the experiment was carried out. The dynamic performances in synchronous and asynchronous deployment schemes are analyzed, and the results show that the cable resistance and truss kinetic energy impact under the asynchronous deployment scheme are minor, and the antenna is more straightforward to deploy. The work provides a new asynchronous deployment scheme and a universal antenna modeling method for dynamic design and performance improvement.

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环形桁架网状反射天线的异步部署方案和多体建模

网状反射天线是大型星载天线的主流，桁架的伸展实现了它们的部署。目前，桁架通常被设计为具有同步约束的单自由度（DOF）可展开机构。然而，每个可布放单元的驱动力分布和阻力载荷不均匀，强制同步约束导致杆件柔性变形，给布放方案设计带来困难。本文介绍了一种采用多 DOF 闭链可展开桁架的异步展开方案。考虑到桁架和索网的实时耦合，计算了桁架的 DOF，并建立了运动学和动力学模型。为求解动态模型，提出了隐式微分代数方程的综合求解算法。制作了六单元天线的原型，并进行了实验。结果表明，异步部署方案下的电缆阻力和桁架动能影响较小，天线部署更简单。该研究为动态设计和性能改进提供了一种新的异步展开方案和通用天线建模方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Mechanica Sinica 物理-工程：机械

CiteScore

5.60

自引率

20.00%

发文量

1807

审稿时长

4 months

期刊介绍： Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics