RELIABILITY AND DEGRADATION MODELING FOR SYSTEM WITH LINEAR FAILURE THRESHOLD UNDER DYNAMIC ENVIRONMENT

摘要

Over the past few decades, the method of reliability assessment based on performance degradation data has attracted many researchers because of its effectiveness and practical significance for complex systems of small-sample, highly reliable and longevity. A degradation model was presented in this paper for system with linear failure threshold under dynamic environment based on Wiener process, and the parameter of the influence function determined by dynamic environment in the degradation model was estimated by Bayesian method. Then a method of reliability assessment was presented for system with linear failure threshold in terms of the distribution of first passage time. The models and method are appropriate in applications and engineering which is meaningful and will play an important role in the remaining useful life estimation and condition-based maintenance for complex systems.