Reliability Assessment of Multistate Degraded Systems: An Application to Power Electronic Systems

Reliability Modeling of Multistate Degraded Power Electronic Converters With Simultaneous Exposure to Dependent Competing Failure Processes

“…Failure modes, mechanisms and effects analysis (FMMEA) is employed to characterize the most critical failure mechanisms and components in the considered PECs based on the literature review and the field experiences. Regarding the automotive application, vibration loading and internal wear-out are found to be the most prevailing failure mechanisms in PECs [21,[37][38][39][40][41]. The analysis has also revealed that IGBT and power capacitors are the most critical components in PECs.…”

“…2-The gradual degradation is a strictly non-decreasing function, ℛ(t)=ℛ(t;θ) where vector θ is a parameter reflecting the uncertainties. This function may be characterized through accelerated aging tests [21]. 3-Vibration random shocks are assumed to have an occurrence rate of λi(t)=(1+ξi)λ0(t) and λ0(t)=λ0+β ℛ(t;θ) [22], where λ0(t) and λi(t) are the initial and the i th occurrence rates of the vibration random shocks, respectively.…”

“…3. Referring to analytics proposed in the literature [15,[21][22][23], sudden degradations may cumulatively be measured. Accordingly,…”

“…These studies focused on the mechanical shocks and the sudden failures in power discrete chips, where similar to [19,20], sudden failure of the power components were experimentally analyzed with no consideration to either gradual degradation or degradation dependencies. Gradual and sudden degradations are often significant in PECs due to highly strained and intense connection among their components [9,21]. As demonstrated in Fig.…”

Review of Health Prognostics and Condition Monitoring of Electronic Components

“…Demonstrate the technique to estimate residual lifetime as well as reuse the capability of used electronic components [81]. The power semiconductor and capacitor are explored using physics of failure, under ageing effect, and feasibility of the multistate degraded system is analyzed [82]. For NIMH battery cells, The methodology to analyze remaining useful life for reuse purposes, so that battery can be reused, in case they are disposed of before the end of their life [83].…”