Friction observer-based hybrid controller for a seat suspension with semi-active electromagnetic damper

Xia, X; Zheng, M; Liu, P; Zhang, N; Ning, D; Du, H

Friction observer-based hybrid controller for a seat suspension with semi-active electromagnetic damper

Xia, X Zheng, M Liu, P Zhang, N

Ning, D Du, H

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Mechatronics, 2021, 76, pp. 102568
Issue Date:: 2021-06-01

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Field	Value	Language
dc.contributor.author	Xia, X
dc.contributor.author	Zheng, M
dc.contributor.author	Liu, P
dc.contributor.author	Zhang, N https://orcid.org/0000-0001-6408-0044
dc.contributor.author	Ning, D
dc.contributor.author	Du, H
dc.date.accessioned	2022-05-09T20:41:24Z
dc.date.available	2022-05-09T20:41:24Z
dc.date.issued	2021-06-01
dc.identifier.citation	Mechatronics, 2021, 76, pp. 102568
dc.identifier.issn	0957-4158
dc.identifier.uri	http://hdl.handle.net/10453/157183
dc.description.abstract	This paper proposes a hybrid controller for a seat suspension equipped with an advanced electromagnetic damper (EMD) system to meet the requirement with vibration isolation and energy saving. The friction of seat suspension has considerable influence on the system dynamic. Applying a constant model to describe the friction is unreliable due to the long term wear and tear. Therefore, an observer is designed to estimate seat suspension friction, and it is used to compensate for the frictional influence in a H∞ controller. The friction observer applies the acceleration, relative displacement and circuit current, which are measurable in engineering. Then, a hybrid controller is further proposed, in which the low-frequency vibration is controlled with the friction observer-based H∞ controller, and the system will switch to passive state with low damping at high frequency based on the dominant frequency of the vibration. In order to validate the effectiveness of the proposed friction observer, the Bouc-Wen friction model is selected to describe actual seat suspension friction, and it is compared with the estimated friction by the observer. Experimental results show that the friction observer has similar performance and less computational complexity compared with the Bouc-Wen friction model. The effectiveness of the proposed hybrid controller is validated on a six-degree of freedom vibration platform with the bump and random excitation. This friction observer-based hybrid controller is helpful for the engineering application as it applies practically measurable variables as feedback and considers the performance of the semi-active device in reality.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Mechatronics
dc.relation.isbasedon	10.1016/j.mechatronics.2021.102568
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering, 0910 Manufacturing Engineering, 0913 Mechanical Engineering
dc.subject.classification	Industrial Engineering & Automation
dc.title	Friction observer-based hybrid controller for a seat suspension with semi-active electromagnetic damper
dc.type	Journal Article
utslib.citation.volume	76
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	0910 Manufacturing Engineering
utslib.for	0913 Mechanical Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2022-05-09T20:41:20Z
pubs.publication-status	Published
pubs.volume	76

Abstract:

This paper proposes a hybrid controller for a seat suspension equipped with an advanced electromagnetic damper (EMD) system to meet the requirement with vibration isolation and energy saving. The friction of seat suspension has considerable influence on the system dynamic. Applying a constant model to describe the friction is unreliable due to the long term wear and tear. Therefore, an observer is designed to estimate seat suspension friction, and it is used to compensate for the frictional influence in a H∞ controller. The friction observer applies the acceleration, relative displacement and circuit current, which are measurable in engineering. Then, a hybrid controller is further proposed, in which the low-frequency vibration is controlled with the friction observer-based H∞ controller, and the system will switch to passive state with low damping at high frequency based on the dominant frequency of the vibration. In order to validate the effectiveness of the proposed friction observer, the Bouc-Wen friction model is selected to describe actual seat suspension friction, and it is compared with the estimated friction by the observer. Experimental results show that the friction observer has similar performance and less computational complexity compared with the Bouc-Wen friction model. The effectiveness of the proposed hybrid controller is validated on a six-degree of freedom vibration platform with the bump and random excitation. This friction observer-based hybrid controller is helpful for the engineering application as it applies practically measurable variables as feedback and considers the performance of the semi-active device in reality.

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http://hdl.handle.net/10453/157183