Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration

Laser Doppler vibrometers (LDVs) are now well-established as an effective non-contact alternative to traditional contacting transducers. Despite 30 years of successful applications, however, very little attention has been given to sensitivity to vibration of the instrument itself. In this paper, the...

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Main Authors:	Ben Halkon, Steve Rothberg
Format:	Default Article
Published:	2017
Subjects:	Mechanical engineering not elsewhere classified Laser Doppler vibrometry Non-contact surface vibration measurement Correction for instrument vibration Measurement uncertain Mechanical Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/23169
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id	rr-article-9575918
record_format	Figshare
spelling	rr-article-95759182017-11-16T00:00:00Z Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration Ben Halkon (1256355) Steve Rothberg (1247499) Mechanical engineering not elsewhere classified Laser Doppler vibrometry Non-contact surface vibration measurement Correction for instrument vibration Measurement uncertain Mechanical Engineering not elsewhere classified Laser Doppler vibrometers (LDVs) are now well-established as an effective non-contact alternative to traditional contacting transducers. Despite 30 years of successful applications, however, very little attention has been given to sensitivity to vibration of the instrument itself. In this paper, the sensitivity to instrument vibration is confirmed before development theoretically and experimentally of a practical scheme to enable correction of measurements for arbitrary instrument vibration. The scheme requires a pair of correction sensors with appropriate orientation and relative location, while using frequency domain processing to accommodate inter-channel time delay and signal integrations. Error reductions in excess of 30 dB are delivered in laboratory tests with simultaneous instrument and target vibration over a broad frequency range. Ultimately, application to measurement on a vehicle simulator experiencing high levels of vibration demonstrates the practical nature of the correction technique and its robustness in a challenging measurement environment. 2017-11-16T00:00:00Z Text Journal contribution 2134/23169 https://figshare.com/articles/journal_contribution/Taking_laser_Doppler_vibrometry_off_the_tripod_correction_of_measurements_affected_by_instrument_vibration/9575918 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Mechanical engineering not elsewhere classified Laser Doppler vibrometry Non-contact surface vibration measurement Correction for instrument vibration Measurement uncertain Mechanical Engineering not elsewhere classified
spellingShingle	Mechanical engineering not elsewhere classified Laser Doppler vibrometry Non-contact surface vibration measurement Correction for instrument vibration Measurement uncertain Mechanical Engineering not elsewhere classified Ben Halkon Steve Rothberg Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration
description	Laser Doppler vibrometers (LDVs) are now well-established as an effective non-contact alternative to traditional contacting transducers. Despite 30 years of successful applications, however, very little attention has been given to sensitivity to vibration of the instrument itself. In this paper, the sensitivity to instrument vibration is confirmed before development theoretically and experimentally of a practical scheme to enable correction of measurements for arbitrary instrument vibration. The scheme requires a pair of correction sensors with appropriate orientation and relative location, while using frequency domain processing to accommodate inter-channel time delay and signal integrations. Error reductions in excess of 30 dB are delivered in laboratory tests with simultaneous instrument and target vibration over a broad frequency range. Ultimately, application to measurement on a vehicle simulator experiencing high levels of vibration demonstrates the practical nature of the correction technique and its robustness in a challenging measurement environment.
format	Default Article
author	Ben Halkon Steve Rothberg
author_facet	Ben Halkon Steve Rothberg
author_sort	Ben Halkon (1256355)
title	Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration
title_short	Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration
title_full	Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration
title_fullStr	Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration
title_full_unstemmed	Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration
title_sort	taking laser doppler vibrometry off the tripod: correction of measurements affected by instrument vibration
publishDate	2017
url	https://hdl.handle.net/2134/23169
_version_	1797556559545368576

Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration

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