A significant area of ongoing research and development in the smart structures community is the implementation of an automated structural health monitoring (SHM) system to provide a 'built-in-test' diagnostic and prognostic capability for a vehicle's health management system using smart sensors and actuators integrated into the structure. A reliable SHM system will enable the practice of condition-based maintenance which can significantly reduce life cycle costs by eliminating unnecessary inspections, minimizing inspection time and effort, and extending the useful life of new and aging aerospace structural components. The most promising techniques under development involve the use of piezoelectric transducers to actively excite and sense the vibration characteristics of the structure and use this information to make estimates regarding the health of the structure. This paper presents an SHM method developed at The Boeing Company called Active Damage Interrogation (ADI), (U.S. Patent US6006163). By detecting changes in the structure's vibration signature, damage can be detected, localized, and assessed. Under previous work, the ADI system was demonstrated to be highly sensitive in detecting edge delaminations on a test article from the MD Explorer helicopter. The ADI system was also shown to also be very effective in detecting simulated fastener failures in a separate metallic structural test article. Recent work, which will be presented here, has concentrated on more complex structures and in varied environments.


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    Title :

    Recent advances in active damage interrogation


    Contributors:
    Dunne, J.P. (author) / Pitt, D.M. (author) / Kilian, K.J. (author) / Sofge, D.A. (author)


    Publication date :

    2001


    Size :

    9 Seiten, 7 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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