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首页> 外文会议>Reliability and Maintainability Symposium (RAMS), 2010 >Optimal design of step stress accelerated degradation test and reliability assessment for quartz flexible accelerometers
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Optimal design of step stress accelerated degradation test and reliability assessment for quartz flexible accelerometers

机译：石英柔性加速度计的阶梯应力加速退化测试和可靠性评估的优化设计

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This paper presents a optimal design approach of step stress accelerated degradation test (SSADT) for quartz flexible accelerometers under the assumption that the degradation of each accelerometer follows a Wiener process and the degradation rate at different stress levels satisfies an Arrhenius function. The asymptotic variance of the pth percentile of lifetime is adopted as optimization objective and its expression formula is provided using the maximum likelihood estimate (MLE) method. The total experimental cost is chosen as a constraint with its expression formula provided. An algorithm is stated to solve the optimal design problem and a Monte Carlo simulation optimization program is developed based on the algorithm. Then, the optimal test plan is obtained after determining the optimization parameters and the SSADT is conducted based on the optimal test plan. At the end of this paper, using SSADT result data, the reliability of quartz flexible accelerometers is assessed by statistical analysis technique of Wiener process and inverse Gaussian distribution (IGD).
机译：本文介绍了阶梯应力加速降解试验（SSADT）的最佳设计方法，用于石英柔性加速度计，假设每个加速度计的劣化遵循维纳过程，不同应力水平的降解率满足Arrhenius函数。采用P TH 百分位的渐近方差是用作优化目标的百分比，并且使用最大似然估计（MLE）方法提供其表达式。选择总实验成本作为所提供的表达式公式作为约束。陈述了一种算法来解决最佳设计问题，并且基于算法开发了蒙特卡罗仿真优化程序。然后，在确定优化参数之后获得最佳测试计划，并且基于最佳测试计划进行SSADT。本文末尾，使用SSADT结果数据，通过维纳工艺的统计分析技术和逆高斯分布（IGD）进行评估石英柔性加速度计的可靠性。

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