| 袁莉芬,朋张胜,何怡刚.基于 Copula 函数的光纤陀螺贮存可靠性评估[J].电子测量与仪器学报,2020,34(8):58-65 |
| 基于 Copula 函数的光纤陀螺贮存可靠性评估 |
| Evaluating storage reliability of FOG based on Copula function |
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| DOI： |
| 中文关键词: 光纤陀螺 Wiener 过程 Copula 函数 贮存可靠性 |
| 英文关键词:fiber optic gyro (FOG) Wiener process Copula functions storage reliability |
| 基金项目:国家自然科学基金(51977153,51577046)、国家自然科学基金重点项目(51637004)、国家重点研发计划“重大科学仪器设备开发”项目(2016YFF0102200)、装备预先研究重点项目(41402040301)资助 |
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| 中文摘要: |
| 针对光纤陀螺可靠性评估中需考虑多性能退化量间相关性的问题,提出一种基于 Copula 函数的光纤陀螺贮存可靠性
评估方法。 首先,采用加速应力退化试验的方式获取光纤陀螺的性能退化数据,并利用 Wiener 过程对各性能退化数据进行建
模,得到它们的退化模型和寿命分布;然后,利用 Copula 函数融合各性能参数的寿命数据,得到可靠性指标;最后,结合光纤陀
螺性能退化数据对该方法进行了验证,贮存条件为 55 ℃ ,考虑各参数间相关性时,光纤陀螺贮存寿命为 38 795 h,而假定性能
参数相互独立时,光纤陀螺贮存寿命为 17 485 h。 结果表明,考虑性能参数相关性时得到的可靠性指标更加合理,同时该方法
有效解决了产品多参数可靠性评估困难的问题,具有较好的实用性和推广性。 |
| 英文摘要: |
| Aiming at the problem of correlation among multiple degradation variables in the reliability evaluation of fiber optic gyro
(FOG), a storage reliability evaluation method of fog based on Copula function is proposed. Firstly, the performance degradation data of
fog is obtained by accelerated stress degradation test, and the Wiener process is used to model the performance degradation data, and
their degradation model and life distribution are obtained. Then, the copula function is used to fuse the life data of each performance
parameter to get the reliability index. Finally, the method is verified by combining the performance degradation data of fog. In ambient
environment of 55 ℃ , the storage life of fog is 38 795 h when considering the correlation between parameters and 17 485 h and assuming
the performance parameters are independent. The results show that the reliability index obtained by considering the correlation of
performance parameters is more reasonable. At the same time, the method effectively solves the problem of multi parameter reliability
evaluation of products, and has better practicability and popularization. |
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