In this paper, a previously published damage tracking method is extended to provide failure prognosis, and applied experimentally to an electromechanical system with a failing supply battery. The method is based on a dynamical systems approach to the problem of damage evolution. In this approach, damage processes are viewed as occurring in a hierarchical dynamical system consisting of a “fast,” directly observable subsystem coupled to a “slow,” hidden subsystem describing damage evolution. Damage tracking is achieved using a two-time-scale modeling strategy based on phase space reconstruction. Using the reconstructed phase space of the reference (undamaged) system, short-time predictive models are constructed. Fast-time data from later stages of damage evolution of a given system are collected and used to estimate a tracking function by calculating the short time reference model prediction error. In this paper, the tracking metric based on these estimates is used as an input to a nonlinear recursive filter, the output of which provides continuous refined estimates of the current damage (or, equivalently, health) state. Estimates of remaining useful life (or, equivalently, time to failure) are obtained recursively using the current damage state estimates under the assumption of a particular damage evolution model. The method is experimentally demonstrated using an electromechanical system, in which mechanical vibrations of a cantilever beam are dynamically coupled to electrical oscillations in an electromagnet circuit. Discharge of a battery powering the electromagnet (the “damage” process in this case) is tracked using strain gauge measurements from the beam. The method is shown to accurately estimate both the battery state and the time to failure throughout virtually the entire experiment.
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January 2004
Technical Papers
A Dynamical Systems Approach to Failure Prognosis
David Chelidze,
David Chelidze
Department of Mechanical Engineering & Applied Mechanics, University of Rhode Island, Kingston, RI 02881
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Joseph P. Cusumano
Joseph P. Cusumano
Department of Engineering Science & Mechanics, Pennsylvania State University, University Park, PA 16802
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David Chelidze
Department of Mechanical Engineering & Applied Mechanics, University of Rhode Island, Kingston, RI 02881
Joseph P. Cusumano
Department of Engineering Science & Mechanics, Pennsylvania State University, University Park, PA 16802
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received February 2003; revised July 2003. Associate Editor: M. I. Friswell.
J. Vib. Acoust. Jan 2004, 126(1): 2-8 (7 pages)
Published Online: February 26, 2004
Article history
Received:
February 1, 2003
Revised:
July 1, 2003
Online:
February 26, 2004
Citation
Chelidze, D., and Cusumano, J. P. (February 26, 2004). "A Dynamical Systems Approach to Failure Prognosis ." ASME. J. Vib. Acoust. January 2004; 126(1): 2–8. https://doi.org/10.1115/1.1640638
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