第18卷第5期 2010年5月
文章编号
1004-924X(2010)051182-07
光学精密工程
Optics and Precision Engineering
Vol. 18No.5
May2010
航天级光电编码器的信号处理系统设计
孙莹12，万秋华1，王树洁1，余容红'，卢欣然"，梁立辉1,2（1，中国科学院长春光学精密机械与物理研究所，吉林长春130033；
2.中国科学院研究生院，北京100039)
摘要：为了实现航天级光电编码器的小型化，减小航天设备的体积、重量并满足其冷备份要求，设计了具有双读数系统的航天级光电编码器信号处理系统，首先，介绍了双读数系统航天级光电编码器的精码和粗码信号处理方法以及信号处理系统的小型化和可靠性设计；然后，从光电编码器误差产生的原因及空间分布特征出发，对双读数系统航天级光电编码器进行了精度分析；最后，采用比较法，以23位高精度光电编码器作为角度基准，对该光电编码器进行了精度检测。实验结果表明：应用该信号处理系统的双读数系统光电编码器的分辨力为20"，精度c≤30"。该系统已在工程项目中得到应用，实践表明系统的设计满足航天设备的技术要求，
词：光电编码器；信号处理；精度分析；双读数系统
关
键
中图分类号：TP212.12
文献标识码：A
dol;10,3788/OPE.20101805.1182
Design of signal process system for spacebornephotoelectric encoder
SUN Yingl.?, WAN Qiu-hua',WANG Shu-jie', SHE Rong-hong', LU Xin-ran', LIANG Li-huil.2
(l.ChangchunInstitute of Optics,FineMechanics and Physics,
ChineseAcademyofSciences，Changchun130033,China;
2.GraduateUniversity of Chinese Academy of Sciences,Beijing 100039,China)
Abstract: In order to realize the miniaturization of spaceborne photoelectric encoders, minish the sizes and weights of the spaceflight equipment effectively and to satisfy the requirement of the cold copy of photoelectric converting circuits, a signal process system is designed for the spaceborne photoelectric encoder with dual-reading system. Firstly, the process methods of the coarse and precise code signals are presented for the spaceborne photoelectric encoder with dual-reading system and the miniaturized and reliable design of the signal process system is described. Then, the accuracy of the spaceborne photoelectric encoder with dual-reading system is analyzed based on the error sources and distribution characteristics. Finally, using a 23-bit high precision photoelectric encoder as the angle standard, the accuracy of the designed photoelectric encoder is tested based on a comparison method. The experi-
收稿日期：2009-04-23；修订日期：2009-05-25 基金项目：国家重大工程项目