小型高精度航天级光电编码器  

The small high-precision spaceborne photoelectric encoder

作　　者：赵长海[1] 万秋华[1] 梁立辉[1] 杨守旺[1] 孙莹[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《电子测量与仪器学报》2015年第8期1224-1230,共7页Journal of Electronic Measurement and Instrumentation

摘　　要：为了减小光电编码器的体积,提高航天级光电编码器的精度,设计了一种小型高精度的航天级光电编码器。首先,编码器采用散装形式,编码器与机构共用一个主轴系,码盘直接安装在机构的主轴上,码盘随机构一起转动,大大提高了整个系统的精度。然后,编码器采用主备一体化设计,一个机械主体,电子学系统冷备份,大大的减小了编码器的体积。最后,编码器数据处理程序集成到主系统FPGA中的一个IP核中,极大的减小了处理电路的尺寸,并提高了电路的可靠性。实验结果表明,本编码器分辨力为2.5″,外形尺寸Φ70×40mm,角度数据最快更新时间为10μs,精度为均方差主σ=8.68″,备σ=9.86″,完全满足航天仪器的使用要求。A small high-precision spaceborne encoder was designed in order to reduce the volume of the encoder and improve the accuracy of encoder in aerospace grade. First, the encoder is in bulk form, the eneoder and mechanism share the same main shaft system, the code disk is installed directly on the spindle mechanism and rotates together with it, therefore the volume could be reduced and the system accuracy could be improved. Then, using integrated design with compact primary and standby device, a machine, the electronics system is cold backup and the volume of the encoder is greatly reduced. Finally, the encoder data processing program is integrated into the main system of FPGA in an IP core, so the size of processing circuit is greatly reduced, and the reliability of the circuit is improved. The experimental results show that the encoder resolution is 2.5″ , external dimension is Φ70 × 40mm, the angle data fastest update time is 10 μs, the primary device precision mean square deviation is equivalent to 8.68″ , and the standby＇ s is 9.86″. which can satisfv the requirements of space equipment completely.

关 键 词：光电编码器 航天级 IP核 高精度 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN762[自动化与计算机技术—控制科学与工程]