Smooth voltage controller and observer for a three-pole active magnetic bearing system

In this study, a simple and smooth voltage controller for a three-pole active magnetic bearing (AMB) system is proposed. It is designed with the backstepping procedure. The first step assumes the currents as the control inputs and designs the smooth current controller that has been proposed in the l...

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Autores principales:	Shyh-Leh CHEN, Yung-Ho HSIAO
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2017
Materias:	active magnetic bearing three-pole voltage-controlled smooth controller nonlinear observer Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/4462fa5c112e4836a4e467793ed4d9ad
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spelling	oai:doaj.org-article:4462fa5c112e4836a4e467793ed4d9ad2021-11-26T07:11:27ZSmooth voltage controller and observer for a three-pole active magnetic bearing system2187-974510.1299/mej.16-00718https://doaj.org/article/4462fa5c112e4836a4e467793ed4d9ad2017-09-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/4/5/4_16-00718/_pdf/-char/enhttps://doaj.org/toc/2187-9745In this study, a simple and smooth voltage controller for a three-pole active magnetic bearing (AMB) system is proposed. It is designed with the backstepping procedure. The first step assumes the currents as the control inputs and designs the smooth current controller that has been proposed in the literature. The second step considers that the currents are not actual inputs, but part of the states. Then, the actual control inputs (voltages) are designed using simple proportional and integral (PI) control to make the error states from the first step to be zero asymptotically. Based on the voltage-controlled AMB system, an observer is designed for the rotor displacement estimation. The observer is based on the input voltages and coil currents that drive the magnetic poles. Such an observer can be utilized in the sensorless control of the AMB system. Due to the strong nonlinearity in the dynamics of 3-pole AMB system, the theory of nonlinear high-gain observer is adopted to design the observer. First, it is shown that the strong nonlinear 3-pole AMB system is observable under the zero input condition, which guarantees the existence of a high-gain observer. Then, the system is transformed into a regular form for the design of observer. Finally, a nonlinear observer is designed following the theory of high-gain observer. The proposed smooth voltage controller and nonlinear observer are verified numerically and experimentally. The results show the effectiveness of the smooth voltage controller and the feasibility of the nonlinear high-gain observer.Shyh-Leh CHENYung-Ho HSIAOThe Japan Society of Mechanical Engineersarticleactive magnetic bearingthree-polevoltage-controlledsmooth controllernonlinear observerMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 4, Iss 5, Pp 16-00718-16-00718 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	active magnetic bearing three-pole voltage-controlled smooth controller nonlinear observer Mechanical engineering and machinery TJ1-1570
spellingShingle	active magnetic bearing three-pole voltage-controlled smooth controller nonlinear observer Mechanical engineering and machinery TJ1-1570 Shyh-Leh CHEN Yung-Ho HSIAO Smooth voltage controller and observer for a three-pole active magnetic bearing system
description	In this study, a simple and smooth voltage controller for a three-pole active magnetic bearing (AMB) system is proposed. It is designed with the backstepping procedure. The first step assumes the currents as the control inputs and designs the smooth current controller that has been proposed in the literature. The second step considers that the currents are not actual inputs, but part of the states. Then, the actual control inputs (voltages) are designed using simple proportional and integral (PI) control to make the error states from the first step to be zero asymptotically. Based on the voltage-controlled AMB system, an observer is designed for the rotor displacement estimation. The observer is based on the input voltages and coil currents that drive the magnetic poles. Such an observer can be utilized in the sensorless control of the AMB system. Due to the strong nonlinearity in the dynamics of 3-pole AMB system, the theory of nonlinear high-gain observer is adopted to design the observer. First, it is shown that the strong nonlinear 3-pole AMB system is observable under the zero input condition, which guarantees the existence of a high-gain observer. Then, the system is transformed into a regular form for the design of observer. Finally, a nonlinear observer is designed following the theory of high-gain observer. The proposed smooth voltage controller and nonlinear observer are verified numerically and experimentally. The results show the effectiveness of the smooth voltage controller and the feasibility of the nonlinear high-gain observer.
format	article
author	Shyh-Leh CHEN Yung-Ho HSIAO
author_facet	Shyh-Leh CHEN Yung-Ho HSIAO
author_sort	Shyh-Leh CHEN
title	Smooth voltage controller and observer for a three-pole active magnetic bearing system
title_short	Smooth voltage controller and observer for a three-pole active magnetic bearing system
title_full	Smooth voltage controller and observer for a three-pole active magnetic bearing system
title_fullStr	Smooth voltage controller and observer for a three-pole active magnetic bearing system
title_full_unstemmed	Smooth voltage controller and observer for a three-pole active magnetic bearing system
title_sort	smooth voltage controller and observer for a three-pole active magnetic bearing system
publisher	The Japan Society of Mechanical Engineers
publishDate	2017
url	https://doaj.org/article/4462fa5c112e4836a4e467793ed4d9ad
work_keys_str_mv	AT shyhlehchen smoothvoltagecontrollerandobserverforathreepoleactivemagneticbearingsystem AT yunghohsiao smoothvoltagecontrollerandobserverforathreepoleactivemagneticbearingsystem
_version_	1718409715596132352

Smooth voltage controller and observer for a three-pole active magnetic bearing system

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