Destabilization of velocity feedback controllers with stroke limited inertial actuators
Destabilization of velocity feedback controllers with stroke limited inertial actuators
It has been observed when using inertial actuators for the active reduction of structural vibration, that velocity feedback controllers are liable to become unstable if the actuator is subject to stroke saturation. This article presents a simple nonlinear, time domain model of an inertial actuator mounted on a single degree of freedom system. At low amplitudes the actuator, when used in a velocity feedback control loop, increases the effective damping of the structure. At higher amplitudes the system is shown to become unstable, however, and generates limit cycle oscillations having a predictable frequency.
EL211-EL217
Baumann, Oliver Nicholas
309e4dd7-eb33-4253-9314-a7a2b767537b
Elliott, Stephen John
721dc55c-8c3e-4895-b9c4-82f62abd3567
May 2007
Baumann, Oliver Nicholas
309e4dd7-eb33-4253-9314-a7a2b767537b
Elliott, Stephen John
721dc55c-8c3e-4895-b9c4-82f62abd3567
Baumann, Oliver Nicholas and Elliott, Stephen John
(2007)
Destabilization of velocity feedback controllers with stroke limited inertial actuators.
Journal of the Acoustical Society of America, 121 (5), .
(doi:10.1121/1.2731018).
Abstract
It has been observed when using inertial actuators for the active reduction of structural vibration, that velocity feedback controllers are liable to become unstable if the actuator is subject to stroke saturation. This article presents a simple nonlinear, time domain model of an inertial actuator mounted on a single degree of freedom system. At low amplitudes the actuator, when used in a velocity feedback control loop, increases the effective damping of the structure. At higher amplitudes the system is shown to become unstable, however, and generates limit cycle oscillations having a predictable frequency.
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Published date: May 2007
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Local EPrints ID: 46548
URI: http://eprints.soton.ac.uk/id/eprint/46548
ISSN: 0001-4966
PURE UUID: 207227df-658b-46f7-be56-aba82fcc8e05
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Date deposited: 17 Jul 2007
Last modified: 15 Mar 2024 09:24
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Author:
Oliver Nicholas Baumann
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