针对全反射棱镜式激光陀螺在稳频过程中相敏信号易受噪声干扰的现象，研究了全反射棱镜式激光陀螺自适应稳频技术。理论分析了全反射棱镜式激光陀螺的稳频特性，结合自适应噪声对消原理，建立了全反射棱镜式激光陀螺自适应稳频系统的数学模型。通过硬件电路设计，搭建了基于递归最小二乘算法的自适应稳频控制系统。分别对原有稳频技术与自适应稳频技术进行了实验测试，实验结果表明，自适应稳频能有效消除噪声对相敏信号的干扰，稳频精度提高了近一个数量级，陀螺精度相应提高了60%以上。此分析结果为提高全反射棱镜式激光陀螺的性能提供了重要参考。

For the phase-sensitive signal of the total reflection prism laser gyros (TRPLG) is subjected to noise interference phenomenon during in frequency stabilization, a novel technique for the adaptive frequency stabilization of TRPLG is studied. The theory of frequency stabilization characteristic of the TRPLG is analyzed, combined with the principle of adaptive noise cancellation, a mathematic model of the adaptive frequency stabilization system in TRPLG is proposed. The control system based on recursive least square method for the adaptive frequency stabilization of TRPLG is built by the hardware circuit design. The experimental tests for the original frequency stabilization technique and adaptive frequency stabilization technique are conducted. The results show that, using adaptive frequency stabilization technique, the performance of phase-sensitive signal subjected to noise interference could be eliminated effectively and frequency stabilization accuracy is improved by nearly an order of magnitude, the gyros accuracy could be improved by over 60% . The analytic study provides an important reference for improving the performance of TRPLG.