第20卷第4期 2012年4月
文章编号
1004924X(2012)04-0692-07
光学精密工程
Optics and Precision Engineering
基于正弦波磁光调制的
空间方位失调角传递技术的改进
杨志勇*，周召发，张志利
Vol, 20No. 4
Apr.2012
（第二炮兵工程学院兵器发射理论与技术国家重点学科实验室，陕西西安710025）
摘要：为了扩大基于正弦波磁光调制的方位传递系统的传递范图并提高传递精度，对传统的方位失调角传递方法进行了改进，在分析当前方位失调角传递原理的基础上，引入二倍角公式来扩大失调角的传递范围；通过分析失调角与磁光调制后光强信号中横坐标不变的极值点的关系，建立了失调角测量模型，并利用信号中极值点的对比细化了测量模型。提出了大角度查表和小角度近似通近的方法，解决了测量模型中反正切函数的具体实现问题。伤真结果表明；失调角的理论传递范围明显扩大，精度较高；实验结果表明：实际的失调角可在一64～64"传递，传递误差在10"以内，优于当前方法。
提出的方法可为大范图、高精度传递空间方位失调角提供参考。关键调：方位传递；空间失调角；二倍角公式；磁光调制
中图分类号：TH741;TN761
文献标识码：A
doi; 10, 3788/OPE, 20122004, 0692
Improvementoftransmittingspatialazimuth basedonsinewavemagneto-opticmodulation
YANG Zhi-yong', ZHOU Zhao-fa, ZHANG Zhi-li
(State Key Discipline Laboratory of Armament Launch Theory and Technology,
the Second Artillery Engineering College,Xi'an 710025, China)
*Correspondingauthor,E-mail:yangzhiyong@126,com
Abstract: To enlarge the transmission scale and improve the transmission precision of an azimuth transmission system based on sine wave magneto-optic modulation, a new method of transmitting the azimuth in a large-scale and high-precision was established, The principle of the current azimuth transmission system was analyzed, and a double-angle formula was introduced to enlarge the transmis sion scale. A model to measure the azimuth was established according to analyzing the relationship be tween the azimuth and the extremum of the modulated light, and the measurement model was expatia-ted by comparing the extremums, A integrated method combined the approximation in little-scale with the looking-up table in large-scale was presented to calculate the arc tangent function in the model. Simulation results indicate that the theoretic transmission scale is widened obviously and the precision
收稿日期：2011-07-27；修订日期：2011-11-02.
基金项目：国家自然科学基金资助项目（No.41174162)