激光陀螺光强扫模曲线模斜机理分析与改善  

Analysis and improvement of mode slope ratio of RLG light intensity mode-scanning curve

作　　者：赵小宁[1] 韩宗虎[1] 严吉中[1] 叶萍[1] 雷建军[1] 靳文华 ZHAO Xiaoning, HAN Zonghu, YAN Jizhong, YE Ping, LEI Jianjun, JIN Wen-hua(Flight Automatic Control Research Institute of AVIC, Xi＇an 710065, China)

机构地区：[1]中国航空工业集团公司西安飞行自动控制研究所,西安710065

出　　处：《中国惯性技术学报》2018年第4期484-487,共4页Journal of Chinese Inertial Technology

基　　金：装备预先研究项目(51309010202)

摘　　要：光路稳定性是影响激光陀螺长期稳定性的重要因素之一。减小稳频球面镜运动过程中产生的模斜,能够提高光路稳定性,进而能够改善陀螺的长期稳定性。通过对激光陀螺扫模过程中模斜产生的物理机理进行了理论分析,确定出了模斜产生的主要原因是扫模过程球面镜曲率半径的变化和光束位置的相对变化。理论分析、数值仿真得出,采取减小预紧模个数、降低扫模过程球面镜的曲率变化、降低损耗等措施,可使激光陀螺光强扫模曲线的模斜减小2～3倍,进而可提高激光陀螺的长期稳定性,这为激光陀螺长期稳定性的提升提供了重要参考。The cavity light path stability may influence long-term performance stability of ring laser gyroscope（RLG）. Reducing the mode slope ratio could significantly improve the stability of cavity light path and long-term stability of RLG. Based on theoretical analysis of RLG mode-scanning process, the main reason of the mode inclination is the change of the concave mirror curvature radius and the deviation of the light beam position. The suggestion for improving the mode slope ratio by decreasing pre-tightening mode number, concave mirror curvature radius change and cavity loss, etc. is put forward, which is useful for improving the long-term stability of RLG and reforming the further development of RLG.

关 键 词：激光陀螺 扫模过程 模斜 光强扫模曲线 长期稳定性 

分 类 号：U666.1[交通运输工程—船舶及航道工程]