摘要
光纤陀螺在宇航环境中会承受多种环境应力的作用,针对光纤陀螺在单一加速应力作用下的极限问题,提出双应力交叉步进加速退化试验方法,实现了寿命和可靠性评估。通过建立包含剩余标准化系数的退化轨迹模型,描述了光纤陀螺退化量与应力水平的关系。基于累积损伤模型及时间折算的模型参数估计方法进行加速退化数据的统计分析,得到光纤陀螺在使用应力水平下的寿命及可靠性信息。以光纤陀螺为对象,验证了此方法的有效性。
Fiber-optic gyroscope （FOG） working in the space environment can experience some kinds of stress. Aiming at the limitation of single accelerating stress level for FOG, step-stress accelerated degradation test （ADT） with two accelerating stresses was proposed to evaluate its reliability or life-time. A degradation path model including residual standardized coefficients was presented to describe degradation path for products with degradation correlating with stress levels. Degradation data were analyzed to obtain life and reliability information with a method based on cumulative exposure model and time transformation. An example of analysis for data of FOG was also made to illustrate the proposed method availablity.
出处
《红外与激光工程》
EI
CSCD
北大核心
2012年第6期1566-1570,共5页
Infrared and Laser Engineering
基金
总装预先研究支持项目
关键词
双应力
光纤陀螺
统计分析
two accelerating stress
fiber-optic gyroscope（FOG）
statistical analysis
