激光陀螺正逆光束损耗差对零位漂移的影响研究  

Study on the Effect of Positive and Negative Beam Loss Difference on Zero Bias of Laser Tyro

作　　者：陆家兵[1] LU Jia-bing(Huazhong Institute of Electro-Optics-Wuhan National Laboratory for Optoelectronics,Wuhan 430223,China)

机构地区：[1]华中光电技术研究所—武汉光电国家研究中心,湖北武汉430223

出　　处：《光学与光电技术》2023年第4期124-129,共6页Optics & Optoelectronic Technology

摘　　要：激光陀螺长时间工作过程中零位保持不变对于捷联惯导有重要意义。介绍了影响激光陀螺零位的主要因素之一,并分析了导致激光陀螺长时间工作过程中产生零位漂移的机理。实验发现,激光陀螺连续工作1个月,由正逆时针光束损耗差引入的零位漂移在0.005 3°/h左右,伴随正逆时针损耗差变化8%左右。损耗差对激光陀螺零位的影响是长期的、缓慢的。若需要减小激光陀螺长期工作的零位漂移,则应当提高正逆行波损耗差的长期稳定性。It is important for the strap down inertial navigation system to keep the zero-bias constant during the long working time of the RLG.The main factors affecting zero bias of the RLG are introdured in this paper.The mechanism of the zero-bias drift during the long working time of the RLG is analyzed.Experimental results show that when the laser gyro works continuously for one month,the zero-bias drift is about 0.0053°/h,and the positive counterclockwise beam loss difference changes by about 8%.The effect of loss difference on zero-bias of laser gyro is long and slow.In order to reduce the zero drift of laser gyro in long-term operation,the long-term stability of the loss difference of forward and retrograde waves should beimproved.

关 键 词：激光陀螺 零位漂移 损耗差 朗缪尔流效应 Fresnel牵引效应 

分 类 号：U666.1[交通运输工程—船舶及航道工程]