基于退化模型的失效机理一致性检验方法

doi:10.7527/S1000-6893.2014.0265

固体力学与飞行器总体设计

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基于退化模型的失效机理一致性检验方法

王浩伟¹, 徐廷学¹, 王伟亚²

1. 海军航空工程学院兵器科学与技术系, 烟台 264000;
2. 海军航空工程学院指挥系, 烟台 264000

收稿日期:2014-03-12 修回日期:2014-09-18 出版日期:2015-03-15 发布日期:2015-03-31
通讯作者: 徐廷学男, 博士, 教授, 博士生导师。主要研究方向:装备综合保障理论与技术。Tel: 0535-6635061 E-mail: xtx-yt@163.com E-mail:xtx-yt@163.com
作者简介:王浩伟男, 博士研究生。主要研究方向:装备可靠性评估与寿命预测。Tel: 0535-6635061 E-mail: wyg2010123@126.com
基金资助:
国家自然科学基金 (61273058)

Test method of failure mechanism consistency based on degradation model

WANG Haowei¹, XU Tingxue¹, WANG Weiya²

1. Department of Ordnance Science and Technology, Naval Aeronautical and Astronautical University, Yantai 264000, China;
2. Department of Command, Naval Aeronautical and Astronautical University, Yantai 264000, China

Received:2014-03-12 Revised:2014-09-18 Online:2015-03-15 Published:2015-03-31
Supported by:
National Natural Science Foundation of China (61273058)

摘要/Abstract

摘要：

有效的加速试验必须保证产品的失效机理不变。针对加速退化试验(ADT)可靠性建模的特点,提出了一种基于退化模型的失效机理一致性检验方法。以基于随机过程和基于退化轨迹拟合的退化模型为例,通过加速系数的2种等效定义分别建立了模型参数与失效机理不变的内在联系,进一步推导出其参数在不同应力下须满足的关系。在合理假定检验样本服从正态分布的基础上,利用t统计量对样本的一致性进行检验。通过2个ADT实例验证了所提检验方法的合理性与可行性。

关键词: 可靠性, 失效机理一致性, 退化模型, 加速系数, t统计量

Abstract:

An effective accelerated test must guarantee that the failure mechanism is unchanged. According to the features of reliability modeling under accelerated degradation test (ADT), a test method of failure mechanism consistency based on degradation model is proposed. Taking the degradation models based on stochastic process and degradation path fitting as examples, the inner connection between model parameters and failure mechanism consistency is constructed through two equivalent definitions of acceleration factor. Furthermore, the relationships which should be satisfied at different stresses are deduced. Then t statistic is utilized to test the consistency of samples on the basis that samples are assumed following a normal distribution. Two ADT cases are provided to validate the rationality of the proposed method.

Key words: reliability, failure mechanism consistency, degradation model, acceleration coefficient, t statistic

中图分类号:

王浩伟, 徐廷学, 王伟亚. 基于退化模型的失效机理一致性检验方法[J]. 航空学报, 2015, 36(3): 889-897.

WANG Haowei, XU Tingxue, WANG Weiya. Test method of failure mechanism consistency based on degradation model[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(3): 889-897.

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E-mail：hkxb@buaa.edu.cn

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基于退化模型的失效机理一致性检验方法

Test method of failure mechanism consistency based on degradation model

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