• 可展开空间结构专栏 •

### 剪叉伸缩竖杆式环形桁架机构设计与性能分析

1. 1 天津大学 机械工程学院，天津300354
2 西安空间无线电技术研究所，西安710100
• 出版日期:2023-02-25 发布日期:2023-01-13

### Design and performance analysis of scissors telescopic vertical rod hoop truss mechanism

YU Liwei，HE Baiyan，NIE Rui，FAN Yesen，MA Xiaofei

1. 1 School of Mechanical Engineering，Tianjin University，Tianjin 300354，China
2 Xi′an Institute of Space Radio Technology，Xi′an 710100，China
• Online:2023-02-25 Published:2023-01-13

Abstract: The deployment smoothness is the key to the smooth deployment of space deployable antennas.The fold/deployment ratio of the antenna is a vital reference factor for the spatial configuration of launch vehicles.To reduce the vibration and shock during the deployment process，improve the deployment smoothness，and reduce the fold/ deployment ratio，the common configurations of deployable antenna truss mechanism were combed.A kind of scissors telescopic vertical rod hoop truss mechanism was proposed，and the basic unit and deployable method were introduced in detail.A detailed analysis of the fold/ deployment ratio shows that the height-to-diameter ratio of the mechanism was reduced by about 35% compared with the Astromesh antenna truss mechanism under the same caliber and deployment height.Through kinematics and dynamics modeling，the deployment smoothness of the mechanism was analyzed.The results indicate that under the same driving force，the root mean square value of the acceleration at each node is about 30% of the Astromesh antenna truss mechanism，with better deployment smoothness.A scaled model was developed.The experimental analysis and parameter test were carried out，demonstrating rationality of the designed mechanism and accuracy of the calculation results.