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Proceedings Paper

Scanning laser vibrometer for dynamic deflection shape characterization of aerospace structures
Author(s): David E. Oliver
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Paper Abstract

The Scanning Laser Vibrometer (SLV) is becoming widely used as a cost effective tool for automated vibration measurement and analysis of aerospace structures and components. Applications include developing techniques for identifying damage in commercial aircraft, analyzing damage initiation mechanisms during environmental testing of circuit boards and optimum locations for active vibration dampers. The primary advantage of the SLV is the speed with which vibrational velocity measurements can be made over an area. An SLV scan of a structure such as the interior of a fuselage, gathering multi-frequency phase and amplitude values at every point, can be accomplished in less than the time taken to attach and acquire data from a single accelerometer. Results are superimposed in color on a digitized video image of the area tested. Laser vibrometers that offer finer velocity resolution, wider operating range and higher linearity are now available in a fully automated scanning package with ultra-high optical sensitivity. This optical sensitivity for testing untreated areas such as flat black surfaces of graphite composites has been limited in the past to low frequencies and amplitudes. Low optical sensitivity has especially restricted applications such as damage detection -- until now.

Paper Details

Date Published: 16 June 1995
PDF: 11 pages
Proc. SPIE 2472, Applied Laser Radar Technology II, (16 June 1995); doi: 10.1117/12.212022
Show Author Affiliations
David E. Oliver, Polytec PI, Inc. (United States)


Published in SPIE Proceedings Vol. 2472:
Applied Laser Radar Technology II
Gary W. Kamerman, Editor(s)

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