Storage Reliability Evaluation based on Competing Risks of Degradation Failure and Random Failure for Missiles

Storage reliability is an important technical index of missiles. And missile failures as the competition results of multi-components degradation failure and random failure, which is utilized to construct storage reliability evaluation model in this paper. The Mahalanobis distance is introduced to evaluate healthy states of missiles. Then Inverse Gaussian process is selected in healthy states degradation modeling. With an assumption that the probability of random failure depends on the degradation of healthy states of missiles, a storage reliability evaluation model of missiles is constructed. A numerical example with a set of missiles in storage is introduced to illustrate the rationality and engineering applicability of the method proposed in this paper.