• 研究探讨 •

### 五面体可展桁架单元展开特性分析

1. 1大连海事大学 船舶与海洋工程学院，大连116026
2北京卫星制造厂有限公司，北京100094
• 出版日期:2020-10-25 发布日期:2020-09-30
• 基金资助:
极地船舶冬装化技术与装备研究基金（22600/017193017）

### Unfolding characteristics analysis of pentahedral deployable truss unit

PENG Xiaoyu，LIN Chengxin，YAO Qi，YANG Dongsheng，TIAN Yun

1. 1 Naval Architecture and Ocean Engineering College, Dalian Maritime University， Dalian116026, China
2 Beijing Satellite Manufacturing Factory， Beijing100094， China
• Online:2020-10-25 Published:2020-09-30

Abstract: According to the characteristic that pentahedral deployable truss units can be combined into various types of truss structures, a pentahedral deployable truss unit was designed to solve the space onorbit assembly of large space truss structures. The pentahedral deployable truss units were used for truss structure assembly after launching into space. In order to analyze the kinematic characteristics of pentahedral deployable truss unit, the degree of freedom of pentahedral structure was analyzed based on the constrained screw theory. Kinematics analysis on the pentahedral structure was carried out by using D-H coordinate transformation method, and the kinematics equation for the deployment process was acquired. The Lagrange method was used to analyze the structure dynamics and the dynamics equation for the deployment process was obtained. Analysis results show that the degree of freedom of the pentahedral deployable unit is 1. The deduced kinematics equation result is highly consistent with the simulation results of Adams simulation software, which can fully describe the structure deployment movement process. Increasing the torsion spring stiffness has less effect on the changing trend of the parameters. The joint acceleration is related not only to the driving force of the torsion spring, but also to the joint position and the joint speed. In the late stages of deployment, the influence of position and velocity on acceleration is obvious.