WCF approach of reliability assessment for solid state power controller with accelerate degradation data

The lower confidence limit of system reliability plays an important role in system reliability assessment, and it is also of a concern to researchers and engineers. In this article, Winterbottom-Cornish-Fisher (WCF) method is applied to estimate the lower confidence limit of the reliability for Solid State Power Controller (SSPC). In order to do this, this article first fits the regression paths and extrapolates the pseudo lifetimes based on the degradation data of MOSFET. With the monotone coherent structure of SSPC and the cumulant properties of parameters, the lower confidence limit of SSPC reliability is derived from the pseudo lifetime of MOSFET.