Full Content is available to subscribers

Subscribe/Learn More  >

Structural Health Monitoring for Rotating Imbalance and Misalignment

[+] Author Affiliations
S. G. Mattson

Great Lakes Sound & Vibration, Inc., Houghton, MI

S. M. Pandit

Michigan Technological University, Houghton, MI

S. A. Kubow

Bettis Atomic Power Laboratory, Goose Creek, SC

Paper No. IMECE2003-42322, pp. 139-148; 10 pages
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Manufacturing
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Manufacturing Engineering Division
  • ISBN: 0-7918-3720-3 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME


The dynamics of rotating machinery are dominated by responses due to shaft and drive train characteristics such as imbalance, misalignment, gear mesh, and bearings. These phenomena occur a fixed number of times every revolution, and are related to rotational speed. This paper presents a new method for condition monitoring of such phenomena. An autoregressive model used for condition assessment is fit to the pulse signal. Decomposition of the model yields its characteristic roots, which contain the frequency, damping value, and variance of the signal component. The model also provides an analytical spectrum yielding clear spectral peaks with extremely accurate levels. The illustrated results are based on an experiment built to simulate a rotating imbalance, shaft misalignment, or a combination of the two. Three areas of improvement are identified. The first is characterization of extra information in the speed signal, eliminating the need for an added measurement that must be related to the speed. The second development is a single number estimate of energies at defect frequencies, eliminating subjective interpretation of spectral plots. The third enhancement is the technique’s ability to make accurate spectral estimates based on limited data, allowing the technician to handle situations where rapid speed changes are unavoidable.

Copyright © 2003 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In