Airframe active vibration-based damage detection and localization

Justin Long, Stephen C. Conlon

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


The development of damage detection, localization and automation techniques is crucial for the successful integration of structural health monitoring technologies in rotorcraft. This study focused on the development of a nonlinear vibration spectroscopy based damage detection and localization method. A progression of damaged joint conditions was created in a prototypical stiffened aluminum plate test bed. Active vibration sources were used to excite the structure, and strain sensor rosettes were used to measure the nonlinear vibration responses induced by the damage. Using a systematic approach, response strain amplitudes were processed at the nonlinear frequency components, and the position of the damage was estimated based on maximum principal strain angle calculations from three strain rosette nodes. Accurate damage localization results were obtained for each damage condition, using relatively low force levels. Effective high frequency excitation for each localization result depended on the damage size and damping present in the system. Edge damping and losses due to sound radiation appeared to affect the localization scheme by reducing energy transmission at some frequencies, as well as reflections from the boundaries. Using developed data processing and automation routines, the technique showed promise for translation to real airframe structures.

Original languageEnglish (US)
Title of host publication70th American Helicopter Society International Annual Forum 2014
PublisherAmerican Helicopter Society
Number of pages14
ISBN (Print)9781632666918
StatePublished - 2014
Event70th American Helicopter Society International Annual Forum 2014 - Montreal, QC, Canada
Duration: May 20 2014May 22 2014

Publication series

NameAnnual Forum Proceedings - AHS International
ISSN (Print)1552-2938


Other70th American Helicopter Society International Annual Forum 2014
CityMontreal, QC

All Science Journal Classification (ASJC) codes

  • General Engineering


Dive into the research topics of 'Airframe active vibration-based damage detection and localization'. Together they form a unique fingerprint.

Cite this