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A semi-active control policy to reduce the occurrence and severity of end-stop impacts in a suspension seat with an electrorheological fluid damper

A semi-active control policy to reduce the occurrence and severity of end-stop impacts in a suspension seat with an electrorheological fluid damper
A semi-active control policy to reduce the occurrence and severity of end-stop impacts in a suspension seat with an electrorheological fluid damper

A semi-active on-off control policy has been developed to reduce the severity of suspension seat end-stop impacts caused by shocks or high magnitude vibration. An electrorheological fluid damper was used to realize the required two-state damping. The effects of the free travel (i.e., the relative displacement within which the suspension damper has low damping) and the on-state damping on end-stop impacts were investigated with a sinusoidal input motion. It was found that both a shorter free travel and higher on-state damping reduced both the occurrence of end-stop impacts and their severity. The control policy was also tested with a random signal at different input magnitudes. The on-off control policy improved the performance of the seat suspension when end-stop impacts would otherwise occur with high magnitude inputs, without causing poor vibration isolation with low magnitude inputs. It is concluded that a successful compromise can be achieved between steady vibration isolation and end-stop impact reduction.

0022-460X
781-793
Wu, Xuting
bb3a0609-dae5-4ba5-b650-86b064f7771d
Griffin, M. J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Wu, Xuting
bb3a0609-dae5-4ba5-b650-86b064f7771d
Griffin, M. J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Wu, Xuting and Griffin, M. J. (1997) A semi-active control policy to reduce the occurrence and severity of end-stop impacts in a suspension seat with an electrorheological fluid damper. Journal of Sound and Vibration, 203 (5), 781-793. (doi:10.1006/jsvi.1996.0901).

Record type: Article

Abstract

A semi-active on-off control policy has been developed to reduce the severity of suspension seat end-stop impacts caused by shocks or high magnitude vibration. An electrorheological fluid damper was used to realize the required two-state damping. The effects of the free travel (i.e., the relative displacement within which the suspension damper has low damping) and the on-state damping on end-stop impacts were investigated with a sinusoidal input motion. It was found that both a shorter free travel and higher on-state damping reduced both the occurrence of end-stop impacts and their severity. The control policy was also tested with a random signal at different input magnitudes. The on-off control policy improved the performance of the seat suspension when end-stop impacts would otherwise occur with high magnitude inputs, without causing poor vibration isolation with low magnitude inputs. It is concluded that a successful compromise can be achieved between steady vibration isolation and end-stop impact reduction.

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Published date: 26 June 1997
Organisations: University of Southampton

Identifiers

Local EPrints ID: 408575
URI: http://eprints.soton.ac.uk/id/eprint/408575
ISSN: 0022-460X
PURE UUID: 597b42ef-28e3-4529-92eb-0d7ed401551e
ORCID for M. J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

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Date deposited: 23 May 2017 04:03
Last modified: 07 Oct 2020 02:48

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Contributors

Author: Xuting Wu
Author: M. J. Griffin ORCID iD

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