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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/8881

Title: A universal framework for modelling measured velocity in laser vibrometry with applications
Authors: Rothberg, Steve
Tirabassi, Mario
Keywords: Laser vibrometry
Vibration measurement
Scanning
Tracking
Misalignment
Issue Date: 2012
Publisher: © Elsevier Ltd.
Citation: ROTHBERG, S. and TIRABASSI, M., 2012. A universal framework for modelling measured velocity in laser vibrometry with applications. Mechanical Systems and Signal Processing, 26, pp.141-166.
Abstract: This paper presents a novel, universally applicable framework for modelling measured velocity in laser vibrometry systems. The framework is introduced generically before demonstration of its application to three scanning vibrometer systems, each configured to measure vibration of a tracked point on a rotating target. The novelty in this vectorial framework lies in the combination of its elements, which include vector descriptions of target velocity, optical device velocity at deflection points, laser beam orientations, incorporating reflection and refraction, and surface normals. Initial alignment and a full set of inevitable misalignments are incorporated by the modification of position vectors and the use of rotation matrices. Inclusion of components of measured velocity associated with moving optical devices is an important feature of the framework. The models derived and their validation against published data demonstrate how this versatile framework can be applied to any optical configuration measuring target motions with any level of complexity. The individual models are explored extensively and quantitatively through simulation. Small but inevitable misalignments are shown to generate measurable low order velocity components and their effects on the sensitivities to in-plane and out-of-plane components of target vibration are quantified.
Description: This article was published in the journal, Mechanical Systems and Signal Processing [© Elsevier Ltd.] and the definitive version is available at: http://dx.doi.org/10.1016/j.ymssp.2011.06.022
Version: Accepted for publication
DOI: 10.1016/j.ymssp.2011.06.022
URI: https://dspace.lboro.ac.uk/2134/8881
Publisher Link: http://dx.doi.org/10.1016/j.ymssp.2011.06.022
ISSN: 0888-3270
1096-1216
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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