Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry

To study the law that governs the complex movements of the mechanism in the process of automatic weapon operation, the velocity tracking test technology of photon Doppler velocimetry is introduced to accurately measure velocity, displacement and acceleration, on the condition that there are long dis...

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Autores principales:	Jinbao Feng, Jinhui Wu, Yu Si, Yubin Gao, Ji Liu, Gao Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	photonic Doppler velocimetry ridge extracting correction algorithm large displacement speed measurement Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/78ef9b7c4bd0447992fdf6d45b6fb8f4
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id	oai:doaj.org-article:78ef9b7c4bd0447992fdf6d45b6fb8f4
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spelling	oai:doaj.org-article:78ef9b7c4bd0447992fdf6d45b6fb8f42021-11-25T18:57:07ZReconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry10.3390/s212275201424-8220https://doaj.org/article/78ef9b7c4bd0447992fdf6d45b6fb8f42021-11-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/22/7520https://doaj.org/toc/1424-8220To study the law that governs the complex movements of the mechanism in the process of automatic weapon operation, the velocity tracking test technology of photon Doppler velocimetry is introduced to accurately measure velocity, displacement and acceleration, on the condition that there are long displacement and rapid velocity change. In the traditional way, out of interference signal time-frequency (TF) transformation draws TF distribution, and then by modulus maxima frequency extraction, comes to the law of velocity change. Due to the influence resulting from the change of fundamental signal as well as that of light intensity signal in the test, based on the TF distribution obtained by TF transformation, the traditional modulus maxima frequency extraction can extract frequency signals, but they show abnormal sudden changes at some moments, making the velocity discontinuous, unsmooth and unreal, which brings obvious errors to the subsequent calculation of acceleration and accurate displacement. Addressing the above-mentioned problems, this paper proposes a ridge extracting correction algorithm based on modulus maxima frequency extraction; this method, based on a large number of experiments where rodless cylinders are used to simulate the motion of a gun automatic mechanism, conducts a detailed calculation and analysis of the experimental results. A comparison of the two algorithms’ processing results, in terms of the speed, displacement and acceleration, suggests that the ridge extracting correction algorithm successfully corrects the frequency selection error, which draws a more continuous and, therefore, effective curve of the velocity change, and by so doing, the error of the displacement test (within 1.36 m displacement) is reduced from more than 3.6% to less than 0.58%, and the uncertainty dropped 97.07%. All these show that the accurate measurement of velocity, displacement and acceleration, with sudden and rapid velocity changes considered, is realized successfully.Jinbao FengJinhui WuYu SiYubin GaoJi LiuGao WangMDPI AGarticlephotonic Doppler velocimetryridge extracting correction algorithmlarge displacement speed measurementChemical technologyTP1-1185ENSensors, Vol 21, Iss 7520, p 7520 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	photonic Doppler velocimetry ridge extracting correction algorithm large displacement speed measurement Chemical technology TP1-1185
spellingShingle	photonic Doppler velocimetry ridge extracting correction algorithm large displacement speed measurement Chemical technology TP1-1185 Jinbao Feng Jinhui Wu Yu Si Yubin Gao Ji Liu Gao Wang Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry
description	To study the law that governs the complex movements of the mechanism in the process of automatic weapon operation, the velocity tracking test technology of photon Doppler velocimetry is introduced to accurately measure velocity, displacement and acceleration, on the condition that there are long displacement and rapid velocity change. In the traditional way, out of interference signal time-frequency (TF) transformation draws TF distribution, and then by modulus maxima frequency extraction, comes to the law of velocity change. Due to the influence resulting from the change of fundamental signal as well as that of light intensity signal in the test, based on the TF distribution obtained by TF transformation, the traditional modulus maxima frequency extraction can extract frequency signals, but they show abnormal sudden changes at some moments, making the velocity discontinuous, unsmooth and unreal, which brings obvious errors to the subsequent calculation of acceleration and accurate displacement. Addressing the above-mentioned problems, this paper proposes a ridge extracting correction algorithm based on modulus maxima frequency extraction; this method, based on a large number of experiments where rodless cylinders are used to simulate the motion of a gun automatic mechanism, conducts a detailed calculation and analysis of the experimental results. A comparison of the two algorithms’ processing results, in terms of the speed, displacement and acceleration, suggests that the ridge extracting correction algorithm successfully corrects the frequency selection error, which draws a more continuous and, therefore, effective curve of the velocity change, and by so doing, the error of the displacement test (within 1.36 m displacement) is reduced from more than 3.6% to less than 0.58%, and the uncertainty dropped 97.07%. All these show that the accurate measurement of velocity, displacement and acceleration, with sudden and rapid velocity changes considered, is realized successfully.
format	article
author	Jinbao Feng Jinhui Wu Yu Si Yubin Gao Ji Liu Gao Wang
author_facet	Jinbao Feng Jinhui Wu Yu Si Yubin Gao Ji Liu Gao Wang
author_sort	Jinbao Feng
title	Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry
title_short	Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry
title_full	Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry
title_fullStr	Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry
title_full_unstemmed	Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry
title_sort	reconstruction of velocity curve in long stroke and high dynamic range laser interferometry
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/78ef9b7c4bd0447992fdf6d45b6fb8f4
work_keys_str_mv	AT jinbaofeng reconstructionofvelocitycurveinlongstrokeandhighdynamicrangelaserinterferometry AT jinhuiwu reconstructionofvelocitycurveinlongstrokeandhighdynamicrangelaserinterferometry AT yusi reconstructionofvelocitycurveinlongstrokeandhighdynamicrangelaserinterferometry AT yubingao reconstructionofvelocitycurveinlongstrokeandhighdynamicrangelaserinterferometry AT jiliu reconstructionofvelocitycurveinlongstrokeandhighdynamicrangelaserinterferometry AT gaowang reconstructionofvelocitycurveinlongstrokeandhighdynamicrangelaserinterferometry
_version_	1718410532026843136

Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry

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