一种高精度半角反射镜指向机构的设计与实现  

Design and Implementation of A New Half-angle Mirror Steering Mechanism with High Accuracy

作　　者：李晓 于婷婷 王淳[1] LI Xiao;YU Tingting;WANG Chun(Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China;Key Laboratory for Advanced Optical Remote Sensing Technology of Beijing, Beijing 100094, China;North China Institute of Aerospace Engineering, Langfang 065000, China)

机构地区：[1]北京空间机电研究所,北京100094 [2]先进光学遥感技术北京市重点实验室,北京100094 [3]北华航天工业学院机电工程学院,廊坊065000

出　　处：《航天返回与遥感》2019年第4期76-85,共10页Spacecraft Recovery & Remote Sensing

基　　金：国家重大科技专项工程

摘　　要：为了实现“海洋一号”C/D 卫星定标光谱仪的星上太阳定标,完成星下点±30°定标区域内高精度成像,文章采用直接驱动方式设计了一种高精度半角反射镜指向机构。为了避免间接驱动引入的误差,实现角秒级的定位精度,半角机构采用了固体润滑角接触球轴承支撑,高精度分体式直流力矩电机驱动,测角反馈元件为无刷双通道旋转变压器,指向定位控制采用了基于位置反馈的闭环控制。在仿真基础上研制了等比试验件,通过了振动、寿命和温度等试验测试,机构指向和定位精度分别优于 36″和 18″。仿真和试验结果表明,文章提出的基于直接驱动方式的设计方法能够满足在轨指向高精度的要求,可为后续空间高精度半角机构以及类似的指向定位机构研制提供参考。In order to achieve the on-board sun calibration for the spectrometer of the HY-1C/D satellite and acquire images with high precision under the scanning area from –30° to +30°, a new half-angle mechanism with high pointing and positioning precision based on direct-driving pattern is developed. To avoid the errors introduced by indirect driving and reach the position precision with arc second level, several measures are adopted in the mechanism such as supporting by solid-lubricated angular contact ball bearing, driving by split DC torque motor, measuring angle by brushless dual-channel rotary transformer and closed-loop control based on position feedback. Under design and simulation optimization, the prototype mechanism with same size has been developed and survived the ground tests such as vibration, life and thermal soak, with the pointing and positioning precision less than 36″ and 18″ respectively. The simulation and experiment results show that the proposed method in the paper based on direct-driving pattern can meet the stern requirement on precision, which can be a valuable basis for the succeeding space mechanism including similar half-angle mechanism and others.

关 键 词：误差因素 指向机构 半角反射镜 定标光谱仪 "海洋一号"卫星 

分 类 号：V423.4[航空宇航科学与技术—飞行器设计]