Control of a Digital Galvanometer Scanner Using a Discrete-Time Sliding-Mode Variable-Structure Controller Based on a Decoupled Disturbance Compensator

Laser processing plays an important role in industrial manufacturing, in which a galvanometer scanner (GS) functions as the core component of the laser processing equipment. With the development of the digital system, the GS based on the digital system finds a broader range of potential application....

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Autores principales:	Guangsheng Chen, Yunlong Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	galvanometer scanner disturbance and parameter perturbation decoupled disturbance compensator discrete-time sliding-mode variable-structure control Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/aef5ecf9b11348849f3608430b868f7d
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spelling	oai:doaj.org-article:aef5ecf9b11348849f3608430b868f7d2021-11-11T14:57:08ZControl of a Digital Galvanometer Scanner Using a Discrete-Time Sliding-Mode Variable-Structure Controller Based on a Decoupled Disturbance Compensator10.3390/app112197882076-3417https://doaj.org/article/aef5ecf9b11348849f3608430b868f7d2021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/9788https://doaj.org/toc/2076-3417Laser processing plays an important role in industrial manufacturing, in which a galvanometer scanner (GS) functions as the core component of the laser processing equipment. With the development of the digital system, the GS based on the digital system finds a broader range of potential application. In order to address the slow step-responses of a GS with disturbance and parameter perturbation, the mathematical model of the motor of the GS is derived and a discrete-time sliding-mode variable-structure controller (DSVC) based on a decoupled disturbance compensator (DDC) (DSVC+DDC) is designed. The step-response performance of a GS is the key factor affecting the quality evaluation of laser processing. Experiments are conducted on the step responses of the motor of the GS on a digital experimental platform. The experiment results show that when guaranteeing a steady-state error within 20 urad and an overshoot of less than 5%, the rise time for step-responses in 1% and 10% of the whole stroke is 1 and 2 ms, decreasing by 23% and 58% compared with the reference performance index, which indicates the effectiveness of the proposed method. The proposed approach can not only compensate for the external disturbance online and improve the step-response speed of the GS, but also relax the traditionally assumed limit of the upper bound of external disturbance to the limit of the change rate of external disturbance, which reduces the difficulty of a practical application. This method has great significance for further applications in high precision machining.Guangsheng ChenYunlong WangMDPI AGarticlegalvanometer scannerdisturbance and parameter perturbationdecoupled disturbance compensatordiscrete-time sliding-mode variable-structure controlTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 9788, p 9788 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	galvanometer scanner disturbance and parameter perturbation decoupled disturbance compensator discrete-time sliding-mode variable-structure control Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	galvanometer scanner disturbance and parameter perturbation decoupled disturbance compensator discrete-time sliding-mode variable-structure control Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Guangsheng Chen Yunlong Wang Control of a Digital Galvanometer Scanner Using a Discrete-Time Sliding-Mode Variable-Structure Controller Based on a Decoupled Disturbance Compensator
description	Laser processing plays an important role in industrial manufacturing, in which a galvanometer scanner (GS) functions as the core component of the laser processing equipment. With the development of the digital system, the GS based on the digital system finds a broader range of potential application. In order to address the slow step-responses of a GS with disturbance and parameter perturbation, the mathematical model of the motor of the GS is derived and a discrete-time sliding-mode variable-structure controller (DSVC) based on a decoupled disturbance compensator (DDC) (DSVC+DDC) is designed. The step-response performance of a GS is the key factor affecting the quality evaluation of laser processing. Experiments are conducted on the step responses of the motor of the GS on a digital experimental platform. The experiment results show that when guaranteeing a steady-state error within 20 urad and an overshoot of less than 5%, the rise time for step-responses in 1% and 10% of the whole stroke is 1 and 2 ms, decreasing by 23% and 58% compared with the reference performance index, which indicates the effectiveness of the proposed method. The proposed approach can not only compensate for the external disturbance online and improve the step-response speed of the GS, but also relax the traditionally assumed limit of the upper bound of external disturbance to the limit of the change rate of external disturbance, which reduces the difficulty of a practical application. This method has great significance for further applications in high precision machining.
format	article
author	Guangsheng Chen Yunlong Wang
author_facet	Guangsheng Chen Yunlong Wang
author_sort	Guangsheng Chen
title	Control of a Digital Galvanometer Scanner Using a Discrete-Time Sliding-Mode Variable-Structure Controller Based on a Decoupled Disturbance Compensator
title_short	Control of a Digital Galvanometer Scanner Using a Discrete-Time Sliding-Mode Variable-Structure Controller Based on a Decoupled Disturbance Compensator
title_full	Control of a Digital Galvanometer Scanner Using a Discrete-Time Sliding-Mode Variable-Structure Controller Based on a Decoupled Disturbance Compensator
title_fullStr	Control of a Digital Galvanometer Scanner Using a Discrete-Time Sliding-Mode Variable-Structure Controller Based on a Decoupled Disturbance Compensator
title_full_unstemmed	Control of a Digital Galvanometer Scanner Using a Discrete-Time Sliding-Mode Variable-Structure Controller Based on a Decoupled Disturbance Compensator
title_sort	control of a digital galvanometer scanner using a discrete-time sliding-mode variable-structure controller based on a decoupled disturbance compensator
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/aef5ecf9b11348849f3608430b868f7d
work_keys_str_mv	AT guangshengchen controlofadigitalgalvanometerscannerusingadiscretetimeslidingmodevariablestructurecontrollerbasedonadecoupleddisturbancecompensator AT yunlongwang controlofadigitalgalvanometerscannerusingadiscretetimeslidingmodevariablestructurecontrollerbasedonadecoupleddisturbancecompensator
_version_	1718437919910264832

Control of a Digital Galvanometer Scanner Using a Discrete-Time Sliding-Mode Variable-Structure Controller Based on a Decoupled Disturbance Compensator

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