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Investigation on the performance of a velocity feedback control unit for structural vibration control: Theory and experiments

Investigation on the performance of a velocity feedback control unit for structural vibration control: Theory and experiments
Investigation on the performance of a velocity feedback control unit for structural vibration control: Theory and experiments

A valuable solution for structural vibration control of lightly damped systems, subjected to random disturbance, is to provide active damping by generating a control force proportional to the local velocity of the structure. It has been shown in the literature that an optimal feedback gain exists, at which the kinetic energy of the structure is minimised. Furthermore, other studies have shown that the minimisation of the kinetic energy can be approximated with the maximisation of the power absorbed by the control unit, reducing the amount of information required for the estimation of the performance of the control system. In this paper the reduction of flexural vibration on a plate by means of a local velocity feedback control, with a collocated inertial actuator and sensor pair, is considered. The performance of the control unit is investigated both numerically and experimentally, in terms of the kinetic energy of the structure and the power absorbed by the control unit. The influence of the frequency range considered in the assessment of the performance is analysed. In particular, the equivalence between the minimisation of the kinetic energy and the maximisation of the power absorbed is investigated, as a crucial step into the design of a self-contained locally tunable control unit.

Active control, Inertial actuator, Power absorption, Structural vibration, Velocity feedback
153-161
Springer New York
Camperi, S.
fdfb41af-b996-4d1b-bad2-f14c21d06e6d
Ghandchi-Tehrani, M.
c2251e5b-a029-46e2-b585-422120a7bc44
Elliott, S. J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Niezrecki, Christopher
Baqersad, Javad
Camperi, S.
fdfb41af-b996-4d1b-bad2-f14c21d06e6d
Ghandchi-Tehrani, M.
c2251e5b-a029-46e2-b585-422120a7bc44
Elliott, S. J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Niezrecki, Christopher
Baqersad, Javad

Camperi, S., Ghandchi-Tehrani, M. and Elliott, S. J. (2019) Investigation on the performance of a velocity feedback control unit for structural vibration control: Theory and experiments. Niezrecki, Christopher and Baqersad, Javad (eds.) In Structural Health Monitoring, Photogrammetry and DIC, Volume 6 - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. vol. 6, Springer New York. pp. 153-161 . (doi:10.1007/978-3-319-74476-6_21).

Record type: Conference or Workshop Item (Paper)

Abstract

A valuable solution for structural vibration control of lightly damped systems, subjected to random disturbance, is to provide active damping by generating a control force proportional to the local velocity of the structure. It has been shown in the literature that an optimal feedback gain exists, at which the kinetic energy of the structure is minimised. Furthermore, other studies have shown that the minimisation of the kinetic energy can be approximated with the maximisation of the power absorbed by the control unit, reducing the amount of information required for the estimation of the performance of the control system. In this paper the reduction of flexural vibration on a plate by means of a local velocity feedback control, with a collocated inertial actuator and sensor pair, is considered. The performance of the control unit is investigated both numerically and experimentally, in terms of the kinetic energy of the structure and the power absorbed by the control unit. The influence of the frequency range considered in the assessment of the performance is analysed. In particular, the equivalence between the minimisation of the kinetic energy and the maximisation of the power absorbed is investigated, as a crucial step into the design of a self-contained locally tunable control unit.

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More information

e-pub ahead of print date: 30 May 2019
Venue - Dates: 36th IMAC, A Conference and Exposition on Structural Dynamics, 2018, United States, 2018-02-12 - 2018-02-15
Keywords: Active control, Inertial actuator, Power absorption, Structural vibration, Velocity feedback

Identifiers

Local EPrints ID: 434263
URI: http://eprints.soton.ac.uk/id/eprint/434263
PURE UUID: 4e90b5e0-3c63-490e-9fae-3d1946b66325
ORCID for S. Camperi: ORCID iD orcid.org/0000-0002-0543-0400

Catalogue record

Date deposited: 18 Sep 2019 16:30
Last modified: 07 Oct 2020 00:17

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Contributors

Author: S. Camperi ORCID iD
Author: S. J. Elliott
Editor: Christopher Niezrecki
Editor: Javad Baqersad

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