Restoring high accuracy to laser Doppler vibrometry measurements affected by vibration of beam steering optics

Halkon, BJ; Rothberg, SJ

Restoring high accuracy to laser Doppler vibrometry measurements affected by vibration of beam steering optics

Halkon, BJ

Rothberg, SJ

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Publication Type:: Journal Article
Citation:: Journal of Sound and Vibration, 2017, 405 pp. 144 - 157
Issue Date:: 2017-09-29

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Field	Value	Language
dc.contributor.author	Halkon, BJ https://orcid.org/0000-0001-5459-2329	en_US
dc.contributor.author	Rothberg, SJ	en_US
dc.date.available	2020-05-25T19:13:36Z
dc.date.issued	2017-09-29	en_US
dc.identifier.citation	Journal of Sound and Vibration, 2017, 405 pp. 144 - 157	en_US
dc.identifier.issn	0022-460X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117393
dc.description.abstract	© 2017 Elsevier Ltd Laser Doppler vibrometers are now well-established as an effective non-contact alternative to traditional contacting transducers. Wide-ranging applications include those where beam steering optics are required to reach locations that are difficult to access but no attention has yet been given to measurement sensitivity to the vibration of those optics. In this paper, a thorough mathematical treatment of this sensitivity to steering optic vibration and its correction is set out. A very practical scheme requiring a single correction measurement, from the back-surface of the mirror at the incidence point and aligned with the mirror normal, delivers an error reduction typically in excess of 30 dB. After validation in the laboratory, the scheme is then applied to a genuinely challenging measurement scenario on a single cylinder racing motorcycle. Correction is theoretically perfect for translational mirror vibrations but angular mirror vibrations require an adapted scheme using a triplet of accelerometers arranged around a circular path on the mirror back-surface and this is set out theoretically.	en_US
dc.relation.ispartof	Journal of Sound and Vibration	en_US
dc.relation.isbasedon	10.1016/j.jsv.2017.05.014	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Acoustics	en_US
dc.title	Restoring high accuracy to laser Doppler vibrometry measurements affected by vibration of beam steering optics	en_US
dc.type	Journal Article
utslib.citation.volume	405	en_US
utslib.for	0203 Classical Physics	en_US
utslib.for	0902 Automotive Engineering	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access	*
pubs.publication-status	Published	en_US
pubs.volume	405	en_US

Abstract:

© 2017 Elsevier Ltd Laser Doppler vibrometers are now well-established as an effective non-contact alternative to traditional contacting transducers. Wide-ranging applications include those where beam steering optics are required to reach locations that are difficult to access but no attention has yet been given to measurement sensitivity to the vibration of those optics. In this paper, a thorough mathematical treatment of this sensitivity to steering optic vibration and its correction is set out. A very practical scheme requiring a single correction measurement, from the back-surface of the mirror at the incidence point and aligned with the mirror normal, delivers an error reduction typically in excess of 30 dB. After validation in the laboratory, the scheme is then applied to a genuinely challenging measurement scenario on a single cylinder racing motorcycle. Correction is theoretically perfect for translational mirror vibrations but angular mirror vibrations require an adapted scheme using a triplet of accelerometers arranged around a circular path on the mirror back-surface and this is set out theoretically.

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http://hdl.handle.net/10453/117393