Integration of prognostics at a system level: a Petri net approach



Published Oct 2, 2017
Manuel Chiachío Juan Chiachío Shankar Sankararam John Andrews


This paper presents a mathematical framework for modeling prognostics at a system level, by combining the prognostics principles with the Plausible Petri nets (PPNs) formalism, first developed in M. Chiachío et al. [Proceedings of the Future Technologies Conference, San Francisco, (2016), pp. 165-172]. The main feature of the resulting framework resides in its efficiency to jointly consider the dynamics of discrete events, like maintenance actions, together with multiple sources of uncertain information about the system state like the probability distribution of end-of-life, information from sensors, and information coming from expert knowledge. In addition, the proposed methodology allows us to rigorously model the flow of information through logic operations, thus making it useful for nonlinear control, Bayesian updating, and decision making. A degradation process of an engineering sub-system is analyzed as an example of application using condition-based monitoring from sensors, predicted states from prognostics algorithms, along with information coming from expert knowledge. The numerical results reveal how the
information from sensors and prognostics algorithms can be processed, transferred, stored, and integrated with discreteevent maintenance activities for nonlinear control operations at system level.

How to Cite

Chiachío, M., Chiachío, J., Sankararam, S., & Andrews, J. (2017). Integration of prognostics at a system level: a Petri net approach. Annual Conference of the PHM Society, 9(1).
Abstract 271 | PDF Downloads 140



Prognostic Information Management, system-level PHM, Petri nets

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