• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (18): 212-219.doi: 10.3901/JME.2018.18.212

• 交叉与前沿 • 上一篇    下一篇

基于加速因子不变原则的加速退化试验优化设计

王浩伟1, 周源1,2, 滕飞1, 盖炳良1   

  1. 1. 海军航空大学三院 烟台 264001;
    2. 海军工程大学兵器工程学院 武汉 430032
  • 收稿日期:2017-02-22 修回日期:2018-03-13 出版日期:2018-09-20 发布日期:2018-09-20
  • 通讯作者: 周源(通信作者),男,1979年出生,博士生,副教授。主要研究方向为装备综合保障理论与技术。E-mail:zhouyuan11123@163.com
  • 作者简介:王浩伟,男,1981年出生,博士后。主要研究方向为加速试验理论与技术,装备延寿试验技术。E-mail:13705355730@139.com
  • 基金资助:
    国家自然科学基金(51605487)、山东省自然科学基金(ZR2016FQ03)和中国博士后科学基金(2016M592965)资助项目。

Optimal Design of Accelerated Degradation Test Based on Acceleration Factor Constant Principle

WANG Haowei1, ZHOU Yuan1,2, TENG Fei1, GAI Bingliang1   

  1. 1. The Third Academy, Naval Aeronautical University, Yantai 264001;
    2. Academy of Armament Engineering, Naval Engineering University, Wuhan 430032
  • Received:2017-02-22 Revised:2018-03-13 Online:2018-09-20 Published:2018-09-20

摘要: 加速退化试验广泛用于退化失效型产品的可靠性评估,为提高试验效费比,加速退化试验的优化设计理论与方法成为了研究热点。为进一步推动相关理论与方法发展,以Wiener退化模型及步进温度应力加速退化试验为具体背景,提出基于加速因子不变原则的加速退化试验优化设计方法。根据加速因子不变原则推导Wiener退化模型的各参数是否与加速应力相关,从而客观建立加速退化模型并得到加速因子的解析式;为使产品在加速应力下的失效机理与额定应力下的失效机理尽可能一致,推导出加速因子的渐进方差并将其作为优化目标函数构建试验方案优化的数学模型。提出包含3个连续步骤的组合算法解析数学模型,并将算法程序化以提高解析效率。通过某型电连接器加速退化试验优化的实例应用,验证了所提方法的有效性与可行性。

关键词: Wiener退化模型, 加速退化试验, 加速因子, 失效机理, 优化设计

Abstract: Accelerated degradation test has been extensively applied to reliability assessment for degrading-failure products. To improve the efficiency-cost ratio, the optimal design theory and method of accelerated degradation test becomes a research hot. In order to promote the development of relative theory and method, the optimal design of accelerated degradation test based on acceleration factor constant principle, in which Wiener degradation model and step-temperature accelerated degradation test are considered, is proposed. Whether the parameters of Wiener degradation model are dependent on accelerated stress or not is derived according to the acceleration factor constant principle. Thus the accelerated degradation model is objectively constructed and the expression of acceleration factor is got. Furthermore, in order to ensure that the failure mechanism under accelerated stresses is probably consistent with that under the normal use stresses, the asymptotic variance of acceleration factor, which is selected to be the objective function of optimization, is then derived to set up a mathematical model of test plan. A combined algorithm consisting of 3 sequent steps is developed to resolve the mathematical model, and the algorithm is actualized by programs to improve the solving efficient. Through a case application of optimal design for the accelerated degradation test of a certain type electrical connector, the effectiveness and feasibility of the proposed method is validated.

Key words: Accelerated degradation test, Acceleration factor, Failure mechanism, Optimal design, Wiener degradation

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