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Proceedings Article

Physically based diagnosis and prognosis of cracked rotor shafts

[+] Author Affiliations
Charles H. Oppenheimer

Anteon Corp. (USA)

Kenneth A. Loparo

Case Western Reserve Univ. (USA)

Proc. SPIE 4733, Component and Systems Diagnostics, Prognostics, and Health Management II, 122 (July 15, 2002); doi:10.1117/12.475502
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From Conference Volume 4733

  • Component and Systems Diagnostics, Prognostics, and Health Management II
  • Peter K. Willett; Thiagalingam Kirubarajan
  • Orlando, FL | April 01, 2002

abstract

A physics-based approach for diagnostics and prognostics using integrated observers and life models is presented. Observers are filters based on physical models of machine- fault combinations and use measured machine signatures to identify and characterize the state of a machine. Observers are adaptively deployed as a machine wears and can be coupled with one another to handle interacting conditions and faults. The scheme is detailed using the fault of a cracked rotor shaft that interacts with gravity and imbalance. Observers for shaft cracking and imbalance are presented. The observers provide machine condition and fault strengths to life models used to determine remaining machine life. A life model based on the Forman crack growth law of linear elastic fracture mechanics is developed to determine the number of machine cycles remaining until catastrophic failure.

© (2002) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Charles H. Oppenheimer and Kenneth A. Loparo
"Physically based diagnosis and prognosis of cracked rotor shafts", Proc. SPIE 4733, Component and Systems Diagnostics, Prognostics, and Health Management II, 122 (July 15, 2002); doi:10.1117/12.475502; http://dx.doi.org/10.1117/12.475502


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