针对全反射棱镜式激光陀螺在跳模前后性能下降的现象，系统地研究了全反射棱镜式激光陀螺稳频特性。在对小抖动调制下光强调谐特性和稳频伺服部件理论分析的基础上，建立了全反射棱镜式激光陀螺稳频系统数学模型。给出了稳频精度与加热器电压和环境温升的一般关系及最佳跳模门限的理论计算公式。分析结果表明，环境温升速率的增大和加热器电压的降低会导致稳频性能下降，最佳跳模门限随环境温度的升高而增大，在全温范围内固定跳模门限会导致跳模后稳频性能衰减。采用变增益Ⅱ型系统稳频与最佳跳模门限设置，可以有效消除在跳模前后陀螺性能下降的现象，陀螺精度相应提高了40%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 performance degradation of total reflection prism laser gyros in the front and rear of reset jump, the properties of frequency stabilization of total reflection prism laser gyros are studied systematically. Based on the theory of power tuning characteristic in the small jitter modulation and the serving element of frequency stabilization, a mathematic model of the frequency stabilization system in the total reflection prism laser gyros is proposed. The frequency stabilization accuracy is derived as a function of the heater voltage and rate of temperature, and the theoretical calculation formula of best reset jump threshold is given. The results show that the increase of temperature rate and the reduction of heater voltage can lead to degradation of frequency stabilization accuracy, and the best reset jump threshold increases with the environment temperature increasing, in the fixed and varied temperature environments, the fixed reset jump threshold can result in decreasing accuracy of frequency stabilization after reset jump. Using variable gain II type frequency stabilization system and setting best reset jump threshold, the performance degradation of the front and rear of reset jump can be eliminated effectively, and the gyros accuracy can be improved by over 40% . The analytic study provides an important reference for improving the performance of total reflection prism laser gyros.