航天级光电编码器的信号处理系统设计孙莹.pdf

18　5 　 Vol.18　No.5 2010 5 　 　 　　 　　　　　　　Optics and Precision Engineering 　　　 　　　 　　 May 2010 　1004-924X(2010)05-1182-07 1, 2 1 1 1 1 1, 2 孙　莹 , 万秋华 , 王树洁 , 佘容红 , 卢欣然 , 梁立辉 (1.中国科学院长春光学精密机械与物 研究所, 吉林 长春 130033; 2.中国科学院研究生院, 北京100039) :, 、, 。 , ;, , ;, , 23 , 。 :20″, σ≤30″。 , 。 　　:光电编码器;信号处理;精度分析;双读数系统 :TP212.12　　: 　　doi:10.3788/OPE1182 Design of signal process system for spaceborne photoelectric encoder 1, 2 1 1 SUN Ying , W N Qiu-hua , W NG Shu-jie , 1 1 1, 2 SHE Rong-hong , LU Xin-ran , LI NG Li-hui (1.Changchun Institute of Op tics, FineMechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; 2.Graduate University of Chinese Academy of Sciences, B eij ing 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 standa