摘要
设计了一种采用双蜗轮蜗杆、双滚珠丝杠配合的两点驱动式调焦机构,弥补了传统调焦机构组件基频低、指向精度差的缺点。依据材料力学理论,分析了支撑点数量对构件变形的影响;依据两点支撑的优势设计,研制了新型调焦机构,并进行了力学环境试验验证和指向精度的测试。试验和测试结果表明:该调焦机构三个方向的一阶基频大于220 Hz,试验前后焦面指向精度优于2?。该调焦机构抗力学性能强、指向精度高、运行平稳、可靠性高,适用于空间遥感相机大尺寸长焦面的支撑与精密调整。
A kind of focusing structure making use of two worm wheels and two screws was designed,which has tall frequency and tall precision to compensate the shortcomings of traditional focusing structures.According to theory of mechanics of materials, the relation between the amount of supporting and the member’s distortion was analyzed. According to advantage of two supports which tested the direction precision and was tested in a dynamic environment, we had designed and manufactured a new focusing structure. The result of test proves that the frequency in three directions of the focusing mechanism are higher than 220 Hz, and the direction precision is better than 2 after the dynamic environment testing. The focusing mechanism has nice capability to stand against vibration, tall precision, smooth moving, and high dependability, which can make use of fixated and exact removing big dimension focal plane.
出处
《光电工程》
CAS
CSCD
北大核心
2015年第6期57-61,共5页
Opto-Electronic Engineering
基金
中科院三期创新工程(074Z3JN70)
关键词
大尺寸焦面
调焦机构
高基频
高指向
big dimension focal plane
focusing structure
tall frequency
tall precision
