基于漂移布朗运动的光纤陀螺加速贮存寿命评估

Accelerated storage life evaluation of FOG based on drift Brownian movement

众多"长期贮存,一次使用"的军事应用需求决定了光纤陀螺的贮存寿命指标的重要性,为此针对在贮存期内具有长寿命、高可靠性特点的光纤陀螺,实施加速贮存退化试验,并采用基于漂移布朗运动的方法,对光纤陀螺的贮存寿命与可靠性进行评估。依据光纤陀螺的贮存故障模式影响及危害性分析结果,确定了加速模型,并结合线性漂移布朗运动的特点,建立了光纤陀螺可靠性评估模型。利用加速贮存退化试验的试验数据对光纤陀螺贮存寿命进行评估,得到了评估结果,从而验证了方法的适用性。

The storage life of FOG（Fiber Optic Gyros） is an important index for its military application.Aiming at this issue,the accelerated storage degradation testing is implemented to test the FOG for its long life and high reliability.The evaluation based on drift Brownian movement is utilized to evaluate the storage reliability and storage life of FOG.Based on the failure mode effect and criticality analysis（FMECA） results of FOG,an accelerated model is established.Then,the reliability evaluation model is generated combined with linear drift Brownian movement.Using the degradation data of FOG acceleration storage,the storage life of FOG is evaluated.The evaluated results are reasonable,and the feasibility of the method is validated.