系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (12): 3725-3731.doi: 10.12305/j.issn.1001-506X.2021.12.37

• 可靠性 • 上一篇    下一篇

双指标阶段性退化建模及可靠性分析

毛泽龙1, 王治华1,*, 吴琼2, 刘成瑞3   

  1. 1. 北京航空航天大学航空科学与工程学院, 北京 100083
    2. 北京空间飞行器总体设计部, 北京 100080
    3. 北京控制工程研究所研发中心, 北京 100080
  • 收稿日期:2020-12-28 出版日期:2021-11-24 发布日期:2021-11-30
  • 通讯作者: 王治华
  • 作者简介:毛泽龙(1997—), 男, 硕士研究生, 主要研究方向为性能退化可靠性分析|王治华(1981—), 女, 副教授, 博士研究生导师, 博士, 主要研究方向为复杂系统状态监测、性能退化试验优化设计、小样本可靠性分析与寿命预测|吴琼(1981—), 男, 高级工程师, 博士, 主要研究方向为航天器机构设计及可靠性分析与验证|刘成瑞(1978—), 男, 研究员, 硕士研究生导师, 博士, 主要研究方向为航天器故障诊断、容错控制与可靠性
  • 基金资助:
    国家自然科学基金(11872085);国家重点研发计划(2018YFF0216004)

Bivariate and two-stage degradation modeling and reliability analysis

Zelong MAO1, Zhihua WANG1,*, Qiong WU2, Chengrui LIU3   

  1. 1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China
    2. Beijing Institute of Spacecraft System Engineering, Beijing 100080, China
    3. Research and Development Center, Beijing Institute of Control Engineering, Beijing 100080, China
  • Received:2020-12-28 Online:2021-11-24 Published:2021-11-30
  • Contact: Zhihua WANG

摘要:

高可靠长寿命产品常需同时满足多种功能, 退化机理复杂, 其性能退化过程中多指标、多阶段的问题日益凸显。为此, 考虑退化过程的阶段性特征及不同阶段指标间耦合性规律, 基于Copula函数和Wiener过程建立了双指标阶段性退化模型及可靠性分析方法。同时, 针对产品退化过程中两指标变点不在同一位置的一般性情况, 提出了一种考虑双指标变点的模型参数整体估计方法。最后, 通过舱门锁实例的对比分析, 对所提方法的适用性和有效性进行了验证。结果表明, 同传统双指标模型相比, 所提方法能更为准确地描述退化过程的相关性与阶段性规律, 得到的可靠性评估结果更合理有效。

关键词: 可靠性分析, Wiener退化过程, 双指标, 阶段性, Copula函数

Abstract:

High reliability and long life products often need to meet multiple functions at the same time, and the degradation mechanism is complex. The problem of multi-index and multi-stage in the process of performance degradation is becoming more and more prominent. Therefore, considering the stage characteristics of degradation process and the coupling law between indexes in different stages, a two index stage degradation model and reliability analysis method are established based on Copula function and Wiener process. At the same time, aiming at the general situation that the change points of two indexes are not in the same position in the process of product degradation, a global estimation method of model parameters considering two index change points is proposed. Finally, the applicability and effectiveness of the proposed method are verified by the comparative analysis of an example of cabin door lock. The results show that the proposed simultaneous interpreting method can more accurately describe the correlation and stage rules of degradation process compared with the traditional dual index model, and the reliability evaluation results obtained are more reasonable and effective.

Key words: reliability analysis, Wiener degradation process, bivariate, stage transition, Copula function

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