Reliability modeling of the bivariate deteriorating product with both monotonic and non-monotonic degradation paths

• 作者: SUN Fuqiang GUO Hongxuan LIU Jingcheng
• 来源期刊: 系统工程与电子技术（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: RELIABILITY
• 页码范围: 971-983
• 页数: 13页
• 语种: 英文
• DOI: 10.23919/JSEE.2021.000083

摘要

Fiber optical gyroscope (FOG) is a highly reliable navi-gation element, and the degradation trajectories of its two accu-racy indexes are monotonic and non-monotonic respectively. In this paper, a flexible accelerated degradation testing (ADT) mo-del is used for analyzing the bivariate dependent degradation process of FOG. The time-varying copulas are employed to con-sider the dynamic dependency structure between two marginal degradation processes as the Wiener process and the inverse Gaussian process. The statistical inference is implemented by utilizing an inference function for the margins (IFM) approach. It is demonstrated that the proposed method is powerful in model-ing the joint distribution with various margins.