Deployable antenna mechanism with class of modular truss based on tetrahedral combination unit

被引：0
|
作者：
Guo J. [1 ]
Huang Z. [2 ]
Xu Y. [1 ,3 ]
Guo L. [1 ]
Yao J. [1 ,3 ]
Zhao Y. [1 ,3 ]
机构：
[1] Parallel Robot and Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao
[2] China Academy of Space Technology(Xi'an), Xi'an
[3] Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of National Education, Yanshan University, Qinhuangdao
来源：
Zhao, Yongsheng (yszhao@ysu.edu.cn) | 1600年 / Chinese Society of Astronautics卷 / 41期
基金：
中国国家自然科学基金;
关键词：
DOF analysis; Folding rate; Modular; Tetrahedral combination unit; Truss deployable antenna;
D O I：
10.7527/S1000-6893.2019.23219
中图分类号：
学科分类号：
摘要：
To solve the complex structure, the low folding rate, and the large number of motion pairs of the existing tetrahedral-based truss antenna mechanism, a class of new modular deployable structure is proposed based on the 3RR-3RRR tetrahedral combination unit and the 3RR-3URU tetrahedral symmetric combination unit. The modular structure consisting of three combination units is selected as the analysis object. First, the composition of the modular structure and the axis arrangement of the Hook hinges are introduced in detail, and the number and property of the Degree of Freedom (DOF) of the combination unit itself are obtained by applying the idea of link-demolishing-equivalent-restoration, the screw theory and the G-K formula. Second, the motion simulation of the two modular structures is carried out by using Adams dynamics simulation software. The simulation results verified the correctness of the DOF analysis. The folding rate of the mechanism is characterized by the ratio of the space volume occupied by the mechanism when fully unfolding and fully folding. The folding rates of the existing non-modular mechanisms and modular mechanisms based on tetrahedral unit are calculated. Finally, the number of DOF and motion pairs, the folding rate of non-modular mechanisms and modular mechanisms are compared and analyzed. The analysis results show that the modular structure based on the 3RR-3URU tetrahedral symmetrical combination unit can achieve a large folding rate, and the number of degree of freedom and motion pairs are also relatively reduced. In addition, fewer types of links are use when forming large antennas. The research results provide a theoretical basis for the design and analysis of such modular truss deployable antenna structures. © 2020, Press of Chinese Journal of Aeronautics. All right reserved.
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