【摘要】 谐振式光纤陀螺（RFOG）是一种较有小型化潜力的光学陀螺仪，谐振腔易受温度影响而造成失锁。针对当前失锁复位时间长的问题，分析了失锁原因，并提出了一种快速复位算法。首先分析了光在谐振腔传播过程中因温度梯度导致的附加相位差，推导出温度场作用下出腔光场的表达式，定量分析RFOG在温度场作用下的失锁原因；从工程应用出发，提出了一种RFOG失锁后的分段式快速复位算法，利用连续对激光器移频的方式，大幅度缩短复位时间。实验结果表明，采用所提复位算法最多可以让复位时间从57 s缩短到26 ms，复位脉冲毛刺噪声从187.4(°)/h减小为42.48(°)/h；所提复位算法较易在硬件系统上实现，具有较强的工程应用价值。更多还原

【Abstract】 The resonant fiber optic gyroscope(RFOG) is an optical gyroscope with considerable potential for miniaturization. The resonant cavity is prone to lock loss due to temperature influence. Aiming at the problem of long reset time caused by lock loss, the reasons for lock loss are analyzed and a fast reset algorithm is proposed. Firstly, the additional phase shift caused by the temperature gradient during light propagation within the resonator cavity is analyzed. The expression of the optical field exiting the cavity under the influence of the temperature field is derived, and the reason for the lock loss of RFOG due to the temperature field is quantitatively analyzed. From an engineering application perspective, a segmented rapid reset algorithm is proposed for RFOG lock loss, which can reduce the reset time significantly by continuously shifting the frequency of the laser. The experimental results show that the proposed reset algorithm can reduce the reset time from 57 seconds to 26 milliseconds. Additionally, the reset pulse spike noise is reduced from 187.4(°)/h to 42.48(°)/h. The proposed reset algorithm is relatively easy to implement on hardware systems and holds significant engineering application value.更多还原