Experimental Investigations on Magnetic Sensitivity in Four-Frequency Differential Laser Gyros

Zhiguo, 汪之国 Wang; Xingwu, 龙兴武 Long; Fei, 王飞 Wang; Yun, 黄云 Huang

doi:10.3788/cjl20103703.0713

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“…小、重量轻、精度高、稳定性好、启动快、动态范围大、寿命长和数字输出等诸多优点，是捷联惯导系统的理想器件。目前激光陀螺已成功运用于航空、航天、航海以及地面定位与定向等多个领域 [2] 。作为捷联惯性系统的核心器件，激光陀螺的精度除了受到制造工艺、自身内部参数影响外 [3][4] ，还受到环境条件和工作条件的影响 [5][6][7] 在激光陀螺设计时，通常重点关注谐振腔的光学特性 [8] ，而未考虑其热学特性。结构设计主要靠经验公…”

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Research on Thermal Performance for Resonator of Mechanically Dithered Ring Laser Gyroscopes

Peifeng¹,

Yuanzheng²,

Jiliang³

et al. 2014

激光与光电子学进展

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《中国激光》杂志社 051405-1 抖动激光陀螺谐振腔的热特性研究兰佩锋刘元正王继良徐宏财西安飞行自动控制研究所, 陕西西安 710065 摘要激光陀螺高低温条件下所产生的热应力、形变对其全温性能有重要影响。传统激光陀螺腔体设计重点关注谐振腔的光学特性，力学和热学特性研究较少。传统谐振腔结构设计主要采用经验公式与试验方法，设计迭代次数较多，设计效率低。利用有限元分析方法对抖动激光陀螺谐振腔的主要结构参数与热特性的关系进行研究，得到了谐振腔温度场的分布，以及谐振腔主要结构参数与谐振腔热应力、热形变之间的关系曲线，为抖动激光陀螺的谐振腔优化设计提供了重要方法和指导性依据。该研究对提高抖动激光陀螺设计效率、缩短设计周期、降低成本有着重要意义。关键词光学器件；激光陀螺；有限元分析；谐振腔；热特性；结构设计中图分类号 TN249 文献标识码 AAbstract Thermal deformation and stress have an important influence on performance of ring laser gyroscopes (RLG) in high-low temperature. The traditional design methods of RLG are focus on optical performance of resonator more than mechanical and thermal performance. Generally, the traditional structural design of resonator is dependent on experienced equation and experiment, which result in more iterative design and lower efficiency. Relationship between thermal performance and structural parameters is studied by finite element (FE) method in resonator of mechanically dithered ring laser gyroscopes, the temperature field of resonator and relationship between thermal performance and structural parameters are obtained, which provide the resonator of mechanically dithered ring laser gyroscopes with significant and directive method. It has significance to improve efficiency, shorten hour and reduce cost.

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