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Summary: Page 1 of 28 Prepublication Manuscript for MSSP Allen & Sracic
A New Method for Processing Impact Excited Continuous-Scan Laser
Doppler Vibrometer Measurements
Matthew S. Allen1
and Michael W. Sracic
Department of Engineering Physics
University of Wisconsin-Madison
535 Engineering Research Building
1500 Engineering Drive
Madison, WI 53706
1
Corresponding Author: Email: msallen@engr.wisc.edu, Tel: 608-890-1619 (US), Fax: 608-263-7451 (US)
Abstract:
A scanning Laser Doppler Vibrometer (LDV) can acquire non-contact vibration measurements
from a structure with high spatial detail in an automated manner; one only need redirect the laser via
computer controlled mirrors to acquire measurements at additional points. However, since most LDV
systems are only capable of measuring one point at a time, conventional scanning LDV cannot be
effectively employed in some situations, for example when the time record is long at each measurement
point or when the structure changes with time. Conventional scanning LDV systems are also difficult to
employ with impact excitation because there is considerable variation in the impact location, angle and
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