加速度计加速退化机理一致性边界确定方法

王前程; 陈云霞; 邓沣鹂; 康锐

加速度计加速退化机理一致性边界确定方法

北京航空航天大学可靠性与系统工程学院, 北京 100191

详细信息

中图分类号: V241.4
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出版历程
- 收稿日期: 2011-06-21
- 网络出版日期: 2012-11-30

Approach of determining accelerated degradation mechanism consistency’s boundary for accelerometers

School of Reliability and Systems Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 以加速退化模型——Arrhenius模型为研究对象,发现加速度计在加速试验过程中,保持加速机理不变的应力与退化轨迹斜率存在密切关系.通过针对退化轨迹模型分别为一次函数、指数函数和幂函数三种常见情况,从激活能不变角度推导出保证加速度计加速机理不变的应力-斜率公式,然后基于退化轨迹斜率区间检验提出了一种加速机理一致性条件确定方法,最后根据加速度计恒定高温标度因数稳定性退化仿真试验数据,准确得到了保持加速度计标度因数稳定性退化机理一致的应力边界,验证了该方法的可行性.
- 加速度计 /
- 退化机理一致性 /
- Arrhenius模型 /
- 退化轨迹
Abstract: Through analyzing the Arrhenius model in the accelerated degradation testing, it is found that there is a close relationship between the operating stress and the slope of degraded trajectory in the accelerometer accelerated testing. The degradation trajectory models such as linear function, exponential function and power function were studied. The formulas on the operating stress and the slope of degraded trajectory were inferred from the perspective that the activation energy does not change. Then a method of determining accelerated degradation mechanism consistency’s boundary was offered based on the slope interval inspection of degradation trajectory. Finally, according to the constant temperature degradation simulation test data of the accelerometer scaling factor stability, the accurate temperature boundary that ensured the scaling factor stability degradation mechanism is consistent was given. The result proves that the method is feasible.
- accelerometer /
- degradation mechanism consistency /
- Arrhenius model /
- degraded trajectory

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参考文献(10)

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