冷原子干涉陀螺仪实现及其性能分析

Realization and performance analysis of gyroscope based on cold atom interference

介绍了三脉冲对抛式冷原子干涉陀螺的物理实现过程,分析了其主要噪声来源及其作用机理,并介绍了相应的噪声抑制方法。在此基础上,采用灵敏度函数分析方法对拉曼激光相位噪声、反射镜振动噪声两种主要噪声进行分析,得到其对于干涉相位结果及测量稳定性的准确影响,基于此可以实现典型噪声的准确抑制,为后续陀螺精度的提高提供了理论依据。此外,为了进行系统整体性能评估,参考Allan方差方法对冷原子陀螺进行了陀螺噪声性能测试分析,为后续冷原子干涉陀螺应用于惯性导航系统提供了参考指标。

We present here the physical implementation of gyroscope based on three-pulse cold atomic interference（ CAI）,and its main sources of noise are analyzed. Then,we successfully evaluate the phase effect of Raman laser phase noise and the vibration noise on reflect mirror,and then an accurate suppression of specific noises in interference results is achieved. In addition,in order to assess the overall performance of the CAI gyroscope system,the Allan variance method is used to provide a theoretical evaluation index of system accuracy.