Anomaly Detection based on Information-Theoretic Measures and Particle Filtering Algorithms



Published Sep 23, 2012
Marcos E. Orchard Benjamín Olivares Matías Cerda Jorge F. Silva


This paper presents an anomaly detection module that uses information-theoretic measures to generate a fault indicator from a particle-filtering-based estimate of the posterior state pdf of a dynamic system. The selected measure allows isolating events where the particle filtering algorithm is unable to track the process measurements using a predetermined state transition model, which translates into either a sudden or a steady increment in the differential entropy of the state pdf estimate (evidence of an anomaly on the system). Anomaly detection is carried out by setting a threshold for the entropy value. Actual data illustrating aging of an energy storage device (specifically battery state- of-health (SOH) measurements [A-h]) are used to test and validate the proposed framework.

How to Cite

E. Orchard, M. ., Olivares, B. ., Cerda, M. ., & F. Silva, J. . (2012). Anomaly Detection based on Information-Theoretic Measures and Particle Filtering Algorithms. Annual Conference of the PHM Society, 4(1).
Abstract 228 | PDF Downloads 195



anomaly detection, information theory, particle filtering

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