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ACTIVE CONTROL OF VIBRATION ENERGY TRANSMISSION IN AN INHOMOGENEOUSLY DAMPED PLATE

Büchner, Alexander und Monner, Hans Peter (2025) ACTIVE CONTROL OF VIBRATION ENERGY TRANSMISSION IN AN INHOMOGENEOUSLY DAMPED PLATE. In: ECCOMAS SMART 2025. SMART 2025, 2025-07-01 - 2025-07-03, Linz, Österreich.

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Kurzfassung

The global attenuation of noise in an aircraft cabin for instance, is usually bound to the application of several sensors and actuators on the entire inner structure. However, if there are sharply localized noise and vibration sources in the overall system, the transfer paths from those to the radiating surfaces may be blocked actively. Therefore, by using structural intensity (SI) as a cost function for active control of transferred energy, previous studies show a benefit towards global attenuation of a downstream structure compared to conventional Active Vibration Control using a more centralized set-up of actuators and sensors. These approaches rely on the measurement of SI using finite differences by means of a simple Kirchhoff plate and the assumption of energy transfer mainly by flexural waves. However, these finite differences -approximating local derivatives of displacement- are prone to errors with increasing order of derivatives needed. Hence, a simplification of structural intensity measurement is needed, for the worse of accuracy. Preliminary numerical studies have shown a better attenuation performance than AVC even with simplified methods, especially for inhomogeneously damped structures. Hence, this paper presents the experimental studies on a damped rectangular plate using different sets of sensors and actuators to measure and control structural intensity. A feedforward approach is used for tonal and multi-tonal. Ultimately, the approach is compared to a simple velocity control.

elib-URL des Eintrags:https://elib.dlr.de/215542/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:ACTIVE CONTROL OF VIBRATION ENERGY TRANSMISSION IN AN INHOMOGENEOUSLY DAMPED PLATE
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Büchner, Alexanderalexander.buechner (at) dlr.dehttps://orcid.org/0000-0002-0082-649XNICHT SPEZIFIZIERT
Monner, Hans PeterHans.Monner (at) dlr.dehttps://orcid.org/0000-0002-5897-2422NICHT SPEZIFIZIERT
Datum:2025
Erschienen in:ECCOMAS SMART 2025
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:akzeptierter Beitrag
Stichwörter:active control, structural intensity, noise reduction
Veranstaltungstitel:SMART 2025
Veranstaltungsort:Linz, Österreich
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:1 Juli 2025
Veranstaltungsende:3 Juli 2025
Veranstalter :Johannes Keppler Universität Linz
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Komponenten und Systeme
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L CS - Komponenten und Systeme
DLR - Teilgebiet (Projekt, Vorhaben):L - Wartung und Kabine
Standort: Braunschweig
Institute & Einrichtungen:Institut für Systemleichtbau > Adaptronik
Hinterlegt von: Büchner, Alexander
Hinterlegt am:01 Sep 2025 07:46
Letzte Änderung:01 Sep 2025 07:46

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