|ijphm_16_014.pdf||654.08 KB||July 18, 2016 - 1:37pm|
Adaptive Multi-scale Prognostics and Health Management (AM-PHM) is a methodology designed to support PHM in smart manufacturing systems. As a rule, PHM information is not used in high-level decision-making in manufacturing systems. AM-PHM leverages and integrates component-level PHM information with hierarchical relationships across the component, machine, work cell and production line levels in a manufacturing system. The AM-PHM methodology enables the creation of actionable prognostic and diagnostic intelligence up and down the manufacturing process hierarchy. Decisions are made with the knowledge of the current and projected health state of the system at decision points along the nodes of the hierarchical structure. In order to overcome the issue of exponential explosion of complexity associated with describing a large manufacturing system, the AM-PHM methodology takes a hierarchical Markov Decision Process approach into describing the system and solving for the optimal policy. A description of the AM-PHM methodology is followed by a simulated industry inspired example to show the effectiveness of AM-PHM.