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research-article

Type synthesis of the deployable mechanisms for the truss antenna using the method of adding constraint chains

[+] Author and Article Information
Yundou Xu

Parallel Robot and Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao, China; Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of National Education, Yanshan Univer-sity, Qinhuangdao, China
ydxu@ysu.edu.cn

Liangliang Chen

Parallel Robot and Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao, China
1307152110@qq.com

Wenlan Liu

Parallel Robot and Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao, China
wenlanl@163.com

Jiantao Yao

Parallel Robot and Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao, China; Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of National Education, Yanshan Univer-sity, Qinhuangdao, China
jtyao@ysu.edu.cn

Jialong Zhu

Xi'an Branch of China Academy of Space Technology, Xi'an, China
604884686@qq.com

Yongsheng Zhao

Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of National Education, Yanshan Univer-sity, Qinhuangdao, China
yszhao@ysu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4039341 History: Received July 19, 2017; Revised February 01, 2018

Abstract

In the deployable mechanism for a conventional truss antenna, the nodes cannot be adjusted to be uniform in atti-tude. To solve this problem, a method of adding constraint chains is proposed based on the reciprocal screw theory. By performing type synthesis of the deployable mechanisms for the truss antenna, a novel deployable mechanism is developed that not only enables complete folding and unfolding but also allows the attitude of the nodes to be made uniform. First, according to the unit division of the antenna reflection surface and the characteristic motions of the nodes, constraint chains that can be added between two adjacent nodes are synthesized based on the recipro-cal screw theory. Second, to improve the overall rigidity of the mechanism, a series of basic developable unit mech-anisms is obtained by adding virtual constraint chains, again based on the reciprocal screw theory. Next, a method of dividing the minimum combination unit of the curved-surface antenna mechanism is proposed. The design of the minimum combination unit mechanism is optimized, such that the attitude of all nodes in the final folded state can be made consistent. Finally, the feasibility of the optimized minimum combination unit mechanism is verified by simulation analysis. The proposed method for type synthesis provides a new approach to the design of deployable mechanisms for truss antennas, and novel deployable mechanisms for the curved-surface truss antenna with better performance are obtained.

Copyright (c) 2018 by ASME
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