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A study on the relation between the actuator placement and the characteristics of the sound radiated by a plate structure

Papantoni, Veatriki and Rose, Michael and Monner, Hans Peter (2017) A study on the relation between the actuator placement and the characteristics of the sound radiated by a plate structure. 24th International Congress on Sound and Vibration, 23.-27. July 2017, London, Vereinigtes Königreich.

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Abstract

One of the parameters influencing the performance of active control systems for the reduction of vibration or noise is the placement of the active components of the system (actuators) on the host structure. In active vibration control systems the actuators are normally placed following a criterion related to the kinetic energy on the structure, whereas in active noise reduction systems they are placed taking into account a sound pressure related metric. This numerical study investigates the placement of point force actuators on a generic plate structure within an active structural acoustic control system. Two setups are tested: a plate radiating in free field, and a plate radiating into a rectangular cavity. In both setups the plate is excited in its first natural frequencies by an incident diffuse sound field. The optimal placements of the actuators on the plate determined for a minimal sound power radiated in free field or a minimal acoustic potential energy radiated into the cavity are compared to the optimal actuator placements determined for a minimal mean loudness over the area of interest. The effect of the different actuator placements on the ttenuation of the dominant radiation modes is analysed. The possible benefits of using the psychoacoustic loudness as an actuator placement criterion are discussed.

Item URL in elib:https://elib.dlr.de/113531/
Document Type:Conference or Workshop Item (Speech)
Title:A study on the relation between the actuator placement and the characteristics of the sound radiated by a plate structure
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Papantoni, Veatrikiveatriki.papantoni (at) dlr.dehttps://orcid.org/0000-0002-1036-5981
Rose, MichaelMichael.Rose (at) dlr.dehttps://orcid.org/0000-0002-8311-3638
Monner, Hans PeterHans.Monner (at) dlr.dehttps://orcid.org/0000-0002-5897-2422
Date:July 2017
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:ASAC, actuator placement, loudness
Event Title:24th International Congress on Sound and Vibration
Event Location:London, Vereinigtes Königreich
Event Type:international Conference
Event Dates:23.-27. July 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Papantoni, Veatriki
Deposited On:08 Aug 2017 12:43
Last Modified:14 Aug 2017 09:45

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