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Plate with decentralised velocity feedback loops: power absorption and kinetic energy considerations

Record type: Article

This paper is focused on the vibration effects produced by an array of decentralised velocity feedback loops that are evenly distributed over a rectangular thin plate to minimise its flexural response. The velocity feedback loops are formed by collocated ideal velocity sensor and point force actuator pairs, which are unconditionally stable and produce ‘sky-hook’ damping on the plate. The study compares how the overall flexural vibration of the plate and the local absorption of vibration power by the feedback loops vary with the control gains. The analysis is carried out both considering a typical frequency-domain formulation based on kinetic energy and structural power physical quantities, which is normally used to study vibration and noise problems, and a time-domain formulation also based on kinetic energy and structural power, which is usually implemented to investigate control problems. The time-domain formulation shows to be much more computationally efficient and robust with reference to truncation errors. Thus it has been used to perform a parametric study to assess if, and under which conditions, the minimum of the kinetic energy and the maximum of the absorbed power cost functions match with reference to: (a) the number of feedback control loops, (b) the structural damping in the plate, (c) the mutual distance of a pair of control loops and (d) the mutual gains implemented in a pair of feedback loops.

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Citation

Gardonio, P., Miani, S., Blanchini, F., Casagrande, D. and Elliott, S.J. (2012) Plate with decentralised velocity feedback loops: power absorption and kinetic energy considerations Journal of Sound and Vibration, 331, (8), pp. 1722-1741. (doi:10.1016/j.jsv.2011.12.013).

More information

Published date: 16 January 2012
Organisations: Signal Processing & Control Grp

Identifiers

Local EPrints ID: 209649
URI: http://eprints.soton.ac.uk/id/eprint/209649
ISSN: 0022-460X
PURE UUID: 8500eeb9-fd58-4c45-bbe9-d68d18401b88

Catalogue record

Date deposited: 31 Jan 2012 15:03
Last modified: 18 Jul 2017 10:46

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Contributors

Author: P. Gardonio
Author: S. Miani
Author: F. Blanchini
Author: D. Casagrande
Author: S.J. Elliott

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