Flow disturbance attenuation for pneumatic anti-vibration apparatuses with a Sinusoidal compensator and vibration transmissibility analysis

This paper addresses the compensation of the vibration caused by flow disturbance, which is the pressure fluctuation of compressed air supplied to a pneumatic anti-vibration apparatus (AVA). The pressure of the compressed air changes periodically during compression process. For this reason, proporti...

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Autores principales:	Yukinori NAKAMURA, Hirotaka AKAGAWA, Shinji WAKUI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	pneumatic equipment motion control vibration isolation pressure fluctuation vibration transmissibility Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/2005c304764b4554b8c81b0be2bccd94
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spelling	oai:doaj.org-article:2005c304764b4554b8c81b0be2bccd942021-11-29T05:56:31ZFlow disturbance attenuation for pneumatic anti-vibration apparatuses with a Sinusoidal compensator and vibration transmissibility analysis2187-974510.1299/mej.19-00454https://doaj.org/article/2005c304764b4554b8c81b0be2bccd942020-05-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/3/7_19-00454/_pdf/-char/enhttps://doaj.org/toc/2187-9745This paper addresses the compensation of the vibration caused by flow disturbance, which is the pressure fluctuation of compressed air supplied to a pneumatic anti-vibration apparatus (AVA). The pressure of the compressed air changes periodically during compression process. For this reason, proportional-integral-sinusoidal (PIS) control is utilized so that the flow disturbance can be attenuated. In this control method, a Sinusoidal compensator (S compensator) provides a periodic control input signal whose frequency is the same as the frequency of the disturbance. However, when the PIS control is applied to the vibration attenuation for the pneumatic AVA, there arise two practical problems that have to be solved. First, the vibration of an isolated table occurs in transient state at the start-up/shut-down of the S compensator. This is due to the switching of the S compensator. To deal with the first practical problem, soft switching approach is presented. Second, high-frequency vibration is observed in steady state after the S compensator is started up. Since the source of the high-frequency vibration is the phase-lag of the S compensator, a phase-lead type PIS compensator is employed. By using this compensator, the phase margin of a control system can be increased and the high-frequency vibration can be attenuated. Moreover, in this paper, vibration transmissibility is analyzed so as to investigate effects of the PIS control on the isolation from floor vibration. It is shown that 1) when the PIS control is used, anti-resonance and resonance are excited and 2) there is a trade-off between flow disturbance attenuation and vibration transmissibility reduction.Yukinori NAKAMURAHirotaka AKAGAWAShinji WAKUIThe Japan Society of Mechanical Engineersarticlepneumatic equipmentmotion controlvibration isolationpressure fluctuationvibration transmissibilityMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 3, Pp 19-00454-19-00454 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	pneumatic equipment motion control vibration isolation pressure fluctuation vibration transmissibility Mechanical engineering and machinery TJ1-1570
spellingShingle	pneumatic equipment motion control vibration isolation pressure fluctuation vibration transmissibility Mechanical engineering and machinery TJ1-1570 Yukinori NAKAMURA Hirotaka AKAGAWA Shinji WAKUI Flow disturbance attenuation for pneumatic anti-vibration apparatuses with a Sinusoidal compensator and vibration transmissibility analysis
description	This paper addresses the compensation of the vibration caused by flow disturbance, which is the pressure fluctuation of compressed air supplied to a pneumatic anti-vibration apparatus (AVA). The pressure of the compressed air changes periodically during compression process. For this reason, proportional-integral-sinusoidal (PIS) control is utilized so that the flow disturbance can be attenuated. In this control method, a Sinusoidal compensator (S compensator) provides a periodic control input signal whose frequency is the same as the frequency of the disturbance. However, when the PIS control is applied to the vibration attenuation for the pneumatic AVA, there arise two practical problems that have to be solved. First, the vibration of an isolated table occurs in transient state at the start-up/shut-down of the S compensator. This is due to the switching of the S compensator. To deal with the first practical problem, soft switching approach is presented. Second, high-frequency vibration is observed in steady state after the S compensator is started up. Since the source of the high-frequency vibration is the phase-lag of the S compensator, a phase-lead type PIS compensator is employed. By using this compensator, the phase margin of a control system can be increased and the high-frequency vibration can be attenuated. Moreover, in this paper, vibration transmissibility is analyzed so as to investigate effects of the PIS control on the isolation from floor vibration. It is shown that 1) when the PIS control is used, anti-resonance and resonance are excited and 2) there is a trade-off between flow disturbance attenuation and vibration transmissibility reduction.
format	article
author	Yukinori NAKAMURA Hirotaka AKAGAWA Shinji WAKUI
author_facet	Yukinori NAKAMURA Hirotaka AKAGAWA Shinji WAKUI
author_sort	Yukinori NAKAMURA
title	Flow disturbance attenuation for pneumatic anti-vibration apparatuses with a Sinusoidal compensator and vibration transmissibility analysis
title_short	Flow disturbance attenuation for pneumatic anti-vibration apparatuses with a Sinusoidal compensator and vibration transmissibility analysis
title_full	Flow disturbance attenuation for pneumatic anti-vibration apparatuses with a Sinusoidal compensator and vibration transmissibility analysis
title_fullStr	Flow disturbance attenuation for pneumatic anti-vibration apparatuses with a Sinusoidal compensator and vibration transmissibility analysis
title_full_unstemmed	Flow disturbance attenuation for pneumatic anti-vibration apparatuses with a Sinusoidal compensator and vibration transmissibility analysis
title_sort	flow disturbance attenuation for pneumatic anti-vibration apparatuses with a sinusoidal compensator and vibration transmissibility analysis
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/2005c304764b4554b8c81b0be2bccd94
work_keys_str_mv	AT yukinorinakamura flowdisturbanceattenuationforpneumaticantivibrationapparatuseswithasinusoidalcompensatorandvibrationtransmissibilityanalysis AT hirotakaakagawa flowdisturbanceattenuationforpneumaticantivibrationapparatuseswithasinusoidalcompensatorandvibrationtransmissibilityanalysis AT shinjiwakui flowdisturbanceattenuationforpneumaticantivibrationapparatuseswithasinusoidalcompensatorandvibrationtransmissibilityanalysis
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Flow disturbance attenuation for pneumatic anti-vibration apparatuses with a Sinusoidal compensator and vibration transmissibility analysis

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