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中文摘要：
谐振式光纤陀螺（R-FOG）的频率锁定是陀螺信号检测的关键技术，尤其在长时间的测试中，谐振频率的锁定稳定度决定了陀螺的输出性能。根据光纤环形谐振腔的传输理论，分析了其谐振特性及其一次谐波特性；搭建了R-FOG测试系统，采用正弦波相位调制解调技术实现谐振谱线一次谐波的输出；在分析由运算放大器构成的传统模拟比例积分（PI）电路的漂移误差源的基础上，给出了可以有效抑制漂移误差的T型反馈网络，应用到谐振式光纤陀螺的谐振频率锁定中，得到了较好的锁定效果，经Allan方差分析，谐振频率长时间（4000 s）的锁定稳定度优于9＆#215;10-12。
英文摘要：
For resonator fiber optic gyro （ R-FOG ） , resonance frequency locking is a key technique at detecting the gyro signal . The stability of resonance frequency locking determines the output performance of the gyro , especially in the long-term test . According to the transmission theory of fiber ring resonator （ FRR ） , the resonance characteristics and the first harmonic were analyzed; the R-FOG system was set up . The first harmonic demodulation signal derive from the experiments using the sine wave phase modulation technique; the drift errors of traditional analog proportional -integral PI consisting of operational amplifiers were analyzed . On this basis , T-type feedback network was applied in resonance frequency locking of R-FOG . The drift error was suppressed effectively and better result was obtained. The stability of resonance frequency locking for 4 000 s is superior to 9 ＆#215;10-12 by Allan variance analysis.
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