摘要
为了实现高可靠长寿命产品加速退化试验的高效开展,提出一种可以同时优化加速应力水平、各水平下试样数、各水平测试时间等多个试验设计变量的恒定应力加速退化试验优化设计方法。基于Wiener过程与阿伦尼斯模型建立加速退化模型,以可靠寿命估计精度为目标函数,以试验总经费为约束条件,应用遗传算法搜索最优试验方案,并通过敏感性分析确定优化方案的有效性。以某碳膜电阻器为对象开展加速退化试验优化设计的实例分析来证明所提方法的合理性。敏感性分析结果表明,所提方法的优化结果具有良好的稳健性。
In order to carry out the accelerated degradation test for high reliability and long-life products efficiently,an optimal design method of constant stress accelerated degradation test are proposed,which can simultaneously optimize acceleration stress level,sample number and test time at each level.The accelerated degradation model is constructed based on the Wiener process and the Arrhenius model.The estimation accuracy of reliable life is taken as objective function,and the total cost of the test is defined as the constrain.The genetic algorithm is applied to realize the search of the optimal test scheme,and the effectiveness of the optimal scheme is rerified through the sensitivity analysis.An accelerated degradation test for a carbon film resistor is optimally designed as a case study to demonstrate the rationality of the proposed method.Finally,the sensitivity of the model parameters to the optimization results is analyzed to illustrate the robustness of the optimal design procedure.
作者
刘根
王治华
屈怀远
李璐
刘成瑞
LIU Gen;WANG Zhihua;QU Huaiyuan;LI Lu;LIU Chengrui(School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China;Research and Development Center, Beijing Institute of Control Engineering, Beijing 100080, China)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2021年第1期267-271,共5页
Systems Engineering and Electronics
基金
国家自然科学基金(11872085)资助课题。
关键词
恒定应力加速退化
试验优化设计
多变量优化
WIENER过程
constant stress accelerated degradation
optimal test design
multivariate optimization
Wiener process