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Identification of Failure Precursor Parameters for Cooling Fans

[+] Author Affiliations
Hyunseok Oh

University of Maryland, College Park, MD

Tadahiro Shibutani

Yokohama National University, Yokohama, Kanagawa, Japan

Michael Pecht

University of Maryland, College Park, MD; City University of Hong Kong, Hong Kong, China

Paper No. DETC2009-86280, pp. 1253-1258; 6 pages
  • ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 2: 29th Computers and Information in Engineering Conference, Parts A and B
  • San Diego, California, USA, August 30–September 2, 2009
  • Conference Sponsors: Design Engineering Division and Computers in Engineering Division
  • ISBN: 978-0-7918-4899-9 | eISBN: 978-0-7918-3856-3
  • Copyright © 2009 by ASME


Cooling fans have been a critical part of the thermal management of commercial and military electronic equipment. Although accelerated testing by increasing operating temperatures has been commonly adopted in order to estimate the reliability of cooling fans in a short time frame, the testing time is usually more than 6 months due to the high reliability of current ball bearings. Prognostics and health management is a potential way to solve this problem. The first step in PHM is to identify precursor parameters. This article begins with the identification of precursor parameters from published studies and failure modes, mechanisms, and effects analysis (FMMEA). The health of cooling fans was estimated by monitoring three precursor parameters including acoustic noise, shaft rotational speed, and current consumption. Then the parameter value changes were compared to the failure criteria described in the IPC-9591 standard.

Copyright © 2009 by ASME
Topics: Cooling , Fans , Failure



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