基于贝叶斯理论的光纤陀螺光源可靠性评估

FOG source reliability assessment based on Bayesian

光纤陀螺用掺铒光纤光源利用掺杂光纤在激光泵浦下产生超荧光,它具有输出功率高,谱线宽,时间相干度低,温度稳定性好,寿命长等优点,是高精度光纤陀螺的理想光源。文中针对光纤陀螺用掺铒光纤光源无失效数据可靠性分析问题,在分析其失效模式的基础上,选择威布尔分布作为其寿命分布模型,利用贝叶斯理论估计无失效数据下各检测时刻的失效率,进而对模型参数进行估计得到掺铒光纤光源可靠性指标。该方法中贝叶斯估计结合经验信息大大减小了试验样本数,且克服了传统可靠性评估方法依赖失效数据的缺点,在工程应用上具有很高的价值。

FOG erbium-doped fiber source doped fiber produced Superfluorescent use in laser pumping, it has a high output power, line width, low temporal coherence, good temperature stability, long life, etc., are high-precision FOG the ideal source. Aiming FOG erbium-doped fiber source Failure Data Reliability analysis of the problem, on the basis of analyzing the failure mode, select Weibull distribution as its life model, the estimated time of each detection without failure data using Bayesian theory failure rate, and thus the estimated model parameters erbium-doped fiber source reliability. The Bayesian estimation method combined with experience information greatly reduces the number of test samples, and to overcome the shortcomings of the traditional reliability evaluation method relies on failure data, has a high value in engineering applications.