Reliability modeling of competing failure processes with multi‐stage degradation

Abstract

In this paper, reliability models of competing failure processes for the product subject to degradation and random shocks are established, which are accompanied by degradation path slope change caused by specific shock patterns. The two related failure modes are hard failure arising from different random shocks, and soft failure due to consecutive structure damage or combined with a sudden increment of degradation because of an identical random shock. In sophisticated equipment like aircraft engine systems, the degradation path of performance parameters is characterized by multi-stages when the product is more prone to fatigue or accelerated aging, as a consequence of experienced shocks. This article analyzes five random shock patterns that can change the slope of the degradation path and studies an example to explain the application of proposed reliability models as well as the sensitivity analysis of parameters.

Reliability modeling of systems with random failure threshold subjected to cumulative shocks using machine learning method

“…Wang et al 5 studied the reliability of a system with degradation rate variation under cumulative shocks. Li et al 6 modeled the reliability of a system with multi-stage degradation subjected to cumulative shocks. Drent et al 7 proposed real-time integrated learning and decision making of preventive replacement policy for cumulative shock degradation.…”

“…studied the reliability of a system with degradation rate variation under cumulative shocks. Li et al 6 . modeled the reliability of a system with multi‐stage degradation subjected to cumulative shocks.…”

Reliability analysis of standby provision multi‐unit machining systems with varied failures, degradations, imperfections, and delays

“…It is worthwhile to refer to some notable references in this direction (cf. [10][11][12][13][14] ). The expert design has been extensively used in multi-unit systems that consider the common cause of failure with numerous redundant mechanisms.…”

“…In short mode, the active units fail at a higher rate. It is worthwhile to refer to some notable references in this direction (cf 10–14 …”