星载光学遥感器调焦机构的设计

介绍了一种用于某星载光学遥感器的调焦机构设计，采用谐波减速器和滚珠丝杠、直线导轨配合使用的方案，弥补了传统调焦结构的不足；通过对调焦负载阻力矩的分析选择相应的电机，计算了该调焦机构的理论分辨率为0.43μm；并将该机构随同整机进行了力学环境模拟试验，对其力学环境试验前后的调焦精度进行了对比，其试验前后直线偏角均小于20″，位移误差均小于5μm，满足使用要求。试验结果表明，该空间调焦机构具有结构紧凑、刚度高、位移精度好等特点，能够满足空间调焦的设计要求。

Design of focusing mechanism of space remote sensor

A kind of focusing structure for a space remote sensor was designed, which combined a harmonic drive,a screw, and a line guide rail to compensate the shortcomings of traditional focusing structures. A motor model was selected according to the analysing on a resistance torque,then the resolution of focusing structure was calculated to be 0.43 μm. The structure was tested in a dynamic environment with the whole machine, and focus precisions were compared before and after the dynamic environment testing. The testing data indicate that the line tilt is less than 20″ and the displacement error is less than 5 μm, which meets the requirement for use.Experimental results prove that this focusing structure is characterized by his compact volume, high rigidity and well precision.