基于某2 m轻量化SiC主镜, 设计了一种新型主动调节侧支撑机构。先分析常用的侧向支撑机构的结构形式和特点; 再设计由位移促动器、柔性铰链结构和嵌入杠杆系统等部件组成的主动调节支撑机构; 最后, 对机构的支撑力和移动量进行有限元分析, 并且搭建实验平台, 对其进行刚度和调节能力测试。试验结果表明: 当支撑力为562.55 N时, 杠杆结构中位移促动器承受的力为97.57 N, 大大降低了位移促动器的刚度、强度要求; 位移促动器行程为0.065 mm, 是支撑杆中的22倍, 大大降低了位移促动器分辨率要求; 试验测得刚度为1 225 N/mm, 达到了设计要求, 表明这种柔性杠杆支撑系统具有很好的工程应用能力。

Based on a 2 m lightweight SiC primary mirror, a new type of active adjusting lateral support mechanism was designed. Firstly, the structure forms and characteristics of the commonly used lateral support mechanism were analyzed; and then the active adjusting support mechanism composed of displacement actuator, flexible hinge structure and embedded lever system was designed. Finally, the finite element analysis of the support force and the displacement of the mechanism were carried out, and the experimental platform was built to test the stiffness and the energy-saving ability of the mechanism. The experimental results show that when the supporting force is 562.55 N, the force acting on the displacement actuator in the lever structure is 97.57 N, and the stiffness and strength requirements of the displacement actuator are greatly reduced; The stroke of the displacement actuator is 0.065 mm, which is 22 times that of the supporting rod, and greatly reduces the resolution requirement of the displacement actuator; The stiffness measured by the experiment is 1 225 N/mm, which meets the design requirements. It shows that the flexible lever support system has good engineering application ability.