Estimation of fatigue life using ultrasonic sensing: A symbolic dynamics approach

Shalabh Gupta, Asok Ray

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The paper addresses the issues of diagnosis and prognosis of fatigue failure in mechanical systems using symbolic time series analysis (STSA) of ultrasonic sensor data. Specifically, the paper presents a statistical analysis procedure for online estimation of remaining fatigue life in polycrystalline alloys using STSA-based information from an ensemble of fatigue experiments. This real-time information is useful for monitoring the evolving fatigue damage and life extending control of mechanical structures for prevention of widespread failures. The concept is experimentally validated on 7075-T6 aluminum alloy specimens on a special-purpose fatigue test apparatus that is equipped with ultrasonic flaw detectors and an optical travelling microscope.

Original languageEnglish (US)
Title of host publicationProceedings of the 2007 American Control Conference, ACC
Number of pages6
StatePublished - Dec 1 2007
Event2007 American Control Conference, ACC - New York, NY, United States
Duration: Jul 9 2007Jul 13 2007


Other2007 American Control Conference, ACC
Country/TerritoryUnited States
CityNew York, NY

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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