TY - GEN
T1 - Irreversibility-based measure of slowly evolving anomalies
AU - Srivastav, Abhishek
AU - Ray, Asok
AU - Gupta, Shalabh
PY - 2007/12/1
Y1 - 2007/12/1
N2 - This paper presents formulation and experimental validation of a novel real-time analytical tool for detection of slowly evolving anomalies (e.g., incipient faults and their growth) in dynamical systems. The measure of anomaly is built upon the concept of thermodynamic irreversibility (i.e., deviation of the system trajectory from the respective reversible path of equilibrium state transitions) and is derived as the distance of the estimated system states from the respective (ideal) equilibrium states on the evolution trajectory. The proposed anomaly detection method has been applied to track fatigue damage growth in test specimens of polycrystalline (e.g., 707S-T6 Aluminium) alloys subjected to cyclic loading. The results of experimentation on a laboratory test apparatus are presented to validate the theoretical concept in both crack initiation and crack propagation phases.
AB - This paper presents formulation and experimental validation of a novel real-time analytical tool for detection of slowly evolving anomalies (e.g., incipient faults and their growth) in dynamical systems. The measure of anomaly is built upon the concept of thermodynamic irreversibility (i.e., deviation of the system trajectory from the respective reversible path of equilibrium state transitions) and is derived as the distance of the estimated system states from the respective (ideal) equilibrium states on the evolution trajectory. The proposed anomaly detection method has been applied to track fatigue damage growth in test specimens of polycrystalline (e.g., 707S-T6 Aluminium) alloys subjected to cyclic loading. The results of experimentation on a laboratory test apparatus are presented to validate the theoretical concept in both crack initiation and crack propagation phases.
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U2 - 10.1109/ACC.2007.4282880
DO - 10.1109/ACC.2007.4282880
M3 - Conference contribution
AN - SCOPUS:46449097528
SN - 1424409888
SN - 9781424409884
T3 - Proceedings of the American Control Conference
SP - 3228
EP - 3233
BT - Proceedings of the 2007 American Control Conference, ACC
T2 - 2007 American Control Conference, ACC
Y2 - 9 July 2007 through 13 July 2007
ER -