Compensation filter for feedback control units with proof-mass electrodynamic actuators
Compensation filter for feedback control units with proof-mass electrodynamic actuators
This paper presents studies on velocity feedback control with an electrodynamic proof-mass actuator. It is demonstrated that the stability and performance of the feedback loop could be substantially improved by implementing an appropriate compensation filter. In the simulations the control unit is described in terms of the open and closed-loop base impedance it presents to the structure under control. This allows for a straight-forward physical interpretation of the control system and allows a direct derivation of the expression for the proposed compensator. Studies on the sensitivity of the compensation to uncertainties in the actuator parameters show that even for considerable variations in the actuator response the compensation filter provides significant improvement over the uncompensated case. One draw back of the compensator is the enhancement of the feedback signal at low frequencies. This may lead to stroke/force saturation of the actuator before the optimal control gain can be implemented
425-440
Katholieke Universiteit Leuven
Rohlfing, J.
d8f611a6-8ee7-47bd-8616-59d806bc1788
Elliott, S.J.
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Gardonio, P.
bae5bf72-ea81-43a6-a756-d7153d2de77a
September 2010
Rohlfing, J.
d8f611a6-8ee7-47bd-8616-59d806bc1788
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Gardonio, P.
bae5bf72-ea81-43a6-a756-d7153d2de77a
Rohlfing, J., Elliott, S.J. and Gardonio, P.
(2010)
Compensation filter for feedback control units with proof-mass electrodynamic actuators.
In Proceedings of the International Conference on Noise and Vibration Engineering (ISMA2010).
Katholieke Universiteit Leuven.
.
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Conference or Workshop Item
(Paper)
Abstract
This paper presents studies on velocity feedback control with an electrodynamic proof-mass actuator. It is demonstrated that the stability and performance of the feedback loop could be substantially improved by implementing an appropriate compensation filter. In the simulations the control unit is described in terms of the open and closed-loop base impedance it presents to the structure under control. This allows for a straight-forward physical interpretation of the control system and allows a direct derivation of the expression for the proposed compensator. Studies on the sensitivity of the compensation to uncertainties in the actuator parameters show that even for considerable variations in the actuator response the compensation filter provides significant improvement over the uncompensated case. One draw back of the compensator is the enhancement of the feedback signal at low frequencies. This may lead to stroke/force saturation of the actuator before the optimal control gain can be implemented
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Published date: September 2010
Additional Information:
Paper no. 249
Venue - Dates:
International Conference on Noise and Vibration Engineering ISMA 2010, Leuven, Belgium, 2010-09-19 - 2010-09-21
Identifiers
Local EPrints ID: 166717
URI: http://eprints.soton.ac.uk/id/eprint/166717
PURE UUID: d6fc9818-40fb-4c73-ade6-b9807fb726d5
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Date deposited: 04 Nov 2010 08:29
Last modified: 08 Jan 2022 11:36
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Contributors
Author:
J. Rohlfing
Author:
P. Gardonio
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