A Novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools

A novel method for automatically monitoring the preload degradation of linear guideway type (LGT) recirculating linear ball bearings of an X-Y table is proposed. Both simulations and experiments revealed that the reduction in the natural frequency corresponding to the yawing mode of the worktable wa...

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Autores principales:	Ping Chun TSAI, Chih Chun CHENG, Yin Chun CHENG
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2017
Materias:	operational modal analysis linear guideway preload degradation modal assurance criteria Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/36da78fcc9b0487da1d60f8554f712f3
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id	oai:doaj.org-article:36da78fcc9b0487da1d60f8554f712f3
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spelling	oai:doaj.org-article:36da78fcc9b0487da1d60f8554f712f32021-11-26T07:02:12ZA Novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools2187-974510.1299/mej.16-00480https://doaj.org/article/36da78fcc9b0487da1d60f8554f712f32017-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/4/2/4_16-00480/_pdf/-char/enhttps://doaj.org/toc/2187-9745A novel method for automatically monitoring the preload degradation of linear guideway type (LGT) recirculating linear ball bearings of an X-Y table is proposed. Both simulations and experiments revealed that the reduction in the natural frequency corresponding to the yawing mode of the worktable was extremely sensitive to and varied linearly with the degradation of the LGT linear bearing preload. By attaching three accelerometers to the worktable of a machine tool and then exciting the worktable with a pulse from the servo motor of a feed drive, this study identified the natural frequencies of the worktable and their corresponding mode shapes by using operational modal analysis (OMA). Among all the natural frequencies obtained by OMA, the natural frequency corresponding to the specific yawing mode of the worktable was extracted using the modal assurance criteria, and the change in the extracted frequency was tracked; thus, the degradation of LGT linear bearing preload could be monitored automatically without exciting the worktable manually. In this study, the performance of this method was assessed experimentally, and this paper presents the method in detail.Ping Chun TSAIChih Chun CHENGYin Chun CHENGThe Japan Society of Mechanical Engineersarticleoperational modal analysislinear guidewaypreload degradationmodal assurance criteriaMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 4, Iss 2, Pp 16-00480-16-00480 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	operational modal analysis linear guideway preload degradation modal assurance criteria Mechanical engineering and machinery TJ1-1570
spellingShingle	operational modal analysis linear guideway preload degradation modal assurance criteria Mechanical engineering and machinery TJ1-1570 Ping Chun TSAI Chih Chun CHENG Yin Chun CHENG A Novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools
description	A novel method for automatically monitoring the preload degradation of linear guideway type (LGT) recirculating linear ball bearings of an X-Y table is proposed. Both simulations and experiments revealed that the reduction in the natural frequency corresponding to the yawing mode of the worktable was extremely sensitive to and varied linearly with the degradation of the LGT linear bearing preload. By attaching three accelerometers to the worktable of a machine tool and then exciting the worktable with a pulse from the servo motor of a feed drive, this study identified the natural frequencies of the worktable and their corresponding mode shapes by using operational modal analysis (OMA). Among all the natural frequencies obtained by OMA, the natural frequency corresponding to the specific yawing mode of the worktable was extracted using the modal assurance criteria, and the change in the extracted frequency was tracked; thus, the degradation of LGT linear bearing preload could be monitored automatically without exciting the worktable manually. In this study, the performance of this method was assessed experimentally, and this paper presents the method in detail.
format	article
author	Ping Chun TSAI Chih Chun CHENG Yin Chun CHENG
author_facet	Ping Chun TSAI Chih Chun CHENG Yin Chun CHENG
author_sort	Ping Chun TSAI
title	A Novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools
title_short	A Novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools
title_full	A Novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools
title_fullStr	A Novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools
title_full_unstemmed	A Novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools
title_sort	novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools
publisher	The Japan Society of Mechanical Engineers
publishDate	2017
url	https://doaj.org/article/36da78fcc9b0487da1d60f8554f712f3
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A Novel method based on operational modal analysis for monitoring the preload degradation of linear guideways in machine tools

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