为了充分减小空间望远镜发射的质量和体积, 适应微小卫星的运载需求, 针对某光学系统设计了一种基于带状弹簧的新型空间望远镜自展开机构。首先, 根据理论分析确定了所用带状弹簧的几何尺寸, 并针对某空间光学系统设计了一种基于带状弹簧的新型展开机构; 其次, 建立了该展开机构的有限元模型并分析了其展开后的特性; 最后, 搭建了原理样机并对其进行了实验研究。实验结果表明: 该展开机构展开后的高度为500 mm, 展开后的重复精度误差小于0.1 mm, 偏心小于0.1 mm, 且展开后的一阶自然频率为35.5 Hz, 与有限元分析出的结果相符, 其误差为5.3%, 能够满足空间望远镜展开机构的结构简单、质量轻、稳定可靠、精度高等要求。

In order to reduce launch mass and volume of the space telescope apparently, and to make it suitable for the vehicle requirements of the microsatellite, a new spontaneous deployment mechanism of the space telescope based on the lenticular tape springs was designed, which aimed at one optical system. Firstly, the geometrical sizes of the lenticular tape spring used in this article were preliminarily designated through theoretical analysis, and a new spontaneous deployment mechanism based on the lenticular tape springs was designed aimed at one space optical system. Secondly, the finite element model of the deployment mechanism was built, and its deployment characters were analyzed. Finally, the prototype of the spontaneous deployment mechanism was built up and the experiment was carried out to study its characters. Experimental results indicate that the deployment mechanism is 500 mm in height when it has deployed, and the repetitive deploy accuracy of it can be reached much less than 0.1 mm, also, the fundamental frequency is about 35.5 Hz when it has deployed. It can satisfy the deployment mechanism′s requirements of simple structure, low mass, steady and reliable deployment, as well as higher precision for space telescope.