六棱柱单元可展天线结构设计

提出了一个利用伸缩杆驱动的六棱柱展开单元，该单元可动机构数较少，展开可靠度高，结构刚度好，具有广泛的应用前景。利用伸缩杆六棱柱单元，文中设计了一大型构架式切割抛物面天线，并简要介绍了天线的可展节点细部设计，该天线的形面精度较高，质量轻，造价低。

A LARGE DEPLOYABLE HEXAPOD PARABOLOID ANTENNA

Deployable structures are increasingly interested for engineers in the aerospace field. A deployable hexapod truss is developed for space application in this paper. The most significant feature is no mechanism to be locked during the deployment, compared with previous varied deployable units. It's packaging ratio is shown to be good too. A large paraboloid truss antenna is designed by using the deployable hexapod truss, the geometric condition and structural precision are also studied. An aluminium alloy model is made in the last two years. The details of the movable parts, such as diagonal retractable bars and initial perturbation constructions are intruduced in detail in this paper. It is proved by numerical results of structure analysis that the stiffness of antenna is high enough for space application.