再入式无源光纤陀螺随机误差分析

摘要

文章利用Allan方差法对Sagnac敏感环分别为20m和200m的再入式无源光纤陀螺(RE-FOG)的随机误差进行了详细的分析.结果表明,这种光纤陀螺的噪声中含有传统光纤陀螺中反映不明显的指数相关(Markov)噪声,并且占有重要地位.估计了两个陀螺系统的噪声水平.最后认为,通过深入研究再入式光纤陀螺的误差源和相应的抑制措施, 它的精度有望接近和达到传统光纤陀螺的水平.%By using Allan variance method,the stochastic errors of two re-entrant passiv e fiber gyros(RF-FOG),which are with 20 m and 200 m Sagnac sensing ring (SSR) r espectively,are analyzed in detail.The results imply that exponentially correlat ed(Markov)noise is dominant in their error sources.This behaviour of RE-FOG is great different from that of conventional interferometer fiber gyros (IFOG).The magnitudes of the errors are also estimated.After the noises suppressed by using some effective methods,the middle or high resolution passive RE-FOG can be imp lemented.