Degradation modeling for real-time estimation of residual lifetimes in dynamic environments

作者：Bian Linkan^*; Gebraeel Nagi; Kharoufeh Jeffrey P

来源：IIE Transactions, 2015, 47(5): 471-486.

DOI：10.1080/0740817X.2014.955153

• Bayesian estimation
• Degradation model
• reliability
• residual lifetime distribution

This article presents a methodology for modeling degradation signals from components functioning under dynamically evolving environment conditions. In situ sensor signals related to the degradation process are utilized as well as the environment conditions, to predict and update, in real-time, the distribution of a component's residual lifetime. The model assumes that the time-dependent rate at which a component's degradation signal increases (or decreases) is affected by the severity of the current environmental or operational conditions. These conditions are assumed to evolve as a continuous-time Markov chain. Unique to the proposed model is the union of historical data with real-time, sensor-based data to update the signal parameters, environment parameters, and the residual lifetime distribution of the component within a Bayesian framework.

• 出版日期2015-5-4