环形谐振腔是激光陀螺(RLG)的核心。基于环形谐振腔光线传输理论, 通过求解自洽方程, 数值分析了反射镜的变形对谐振腔稳定性的影响; 在此基础上, 借助有限元分析软件Ansys, 通过参数化建模, 进一步开展了RLG腔长控制镜(PLCM)结构参数对其综合性能影响的仿真分析。结果表明, 在相同尺寸限制和不影响陀螺稳频工作效率的前提下, PLCM结构参数的局部优化可大大地提升谐振腔的动态稳定性; 实验验证与仿真分析结果相吻合, 且优化后的单筋PLCM可满足陀螺在常规机载导航系统振动环境下的使用要求。这对进一步提升RLG, 尤其是小型化RLG的工程化水平具有重要参考意义。

The ring resonator is the central role of ring laser gyro (RLG). Based on the ray transport matrix theory of the ring resonator, the influence of the path length control mirror (PLCM) deformation on the resonator stability is analyzed numerically by solving the self-consistent equation. Furthermore, the influence of the PLCM structural parameters on its comprehensive performance is simulated with the aid of the finite element software Ansys and demonstrated in experiments. The experimental results exhibit great agreement with the simulation, showing that the resonator dynamic stability can be greatly enhanced by the PLCM structural optimization, without almost any impact on PLCM length compensating efficiency. And the optimized PLCM can meet the gyro requirements in the vibration environment of conventional airborne navigation system. This will be of great value for the optimization of the ring resonator for RLG, especially for miniature RLG.