基于加速退化原理的光纤陀螺性能保持期评估方法研究

为评估光纤陀螺在长期贮存条件下的性能保持期,从光纤陀螺自身的特点出发,根据贮存环境的具体要求,详细分析了加速试验过程中试验应力及应力量值的选取,明确了试验样品的分配及具体试验时间估算方式。通过加速退化的手段得到样品的零偏和标度因数等数据,结合可靠性工程领域的成熟方法和理论,采用灰色系统模型和线性退化模型得到外推时间,计算Weibull分布的形状参数和寿命参数,并根据Arrhenius模型对光纤陀螺的性能保持期进行了预测。试验结果表明,采用ASE光源的0.01(°)/h量级的光纤陀螺,其性能保持期可以超过3a。

Study on Performance Retention Period Evaluation Method of FOG Based on Accelerated Degradation Principle

To evaluate the performance retention period of fiber optic gyroscope (FOG) under the long-term storage conditions, the test stress and value during the accelerated degradation test is analyzed according to the characteristics of FOG, and the specific requirements of the storage environment. The test samples are grouped according to the stress level. The testing time is also effective evaluated. Test data, such as bias and scale factor of FOG by means of accelerated degradation test, is analyzed based on the grey system model and the linear degradation model. The shape parameters and life parameters of the Weibull distribution are calculated. The performance retention period is predicted based on the Arrhenius model. The test results show that the performance retention period of 0.01 (°) / h level FOG with the ASE source can exceed 3 years.