elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

Experimental Realization of a Sound Radiation Filter for Feedforward Control to Improve Active Structural Acoustic Control Systems

Haase, Thomas und Bühmann, Henning und Radestock, Martin und Monner, Hans Peter (2017) Experimental Realization of a Sound Radiation Filter for Feedforward Control to Improve Active Structural Acoustic Control Systems. In: SAE Noise & Vibration Exhibition. SAE International. SAE Noise and Vibration Exhibition, 2017-06-12 - 2017-06-15, Grand Rapids, Michigan, USA.

Dieses Archiv kann nicht den Volltext zur Verfügung stellen.

Kurzfassung

Due to the strengthened CO2 and NOx regulations, future vehicles have to be lightweight and efficient. But, lightweight structures are prone to vibrations and radiate sound efficiently. Therefore, many active control approaches are studied to lower noise radiation besides the passive methods. One active approach for reducing Sound radiation from structures is the active structural acoustic control (ASAC). Since the early 90’s, several theoretical studies regarding ASAC systems were presented, but only very little experimental investigations can be found for this alternative to passive damping solutions. The theoretical simulations show promising results of ASAC systems compared to active vibration control approaches. So, for that reason in this paper an experiment is conducted to investigate the performance of an ASAC system in the frequency range up to 600 Hz. A regular sensor grid of 24 accelerometers that are interconnected to establish six radiation signals is applied to an aluminum plate. The plate is excited by a point force and the feedforward control system counteracts these vibrations with 2 inertial actuators. The radiated sound power can be reduced by 4 dB integrated over the targeted frequency band. Compared to an active vibration control system which results only in a 0.2 dB decreased sound radiation, the ASAC system is beneficial. Furthermore, the filter length and the causality aspect of the experiments are analyzed in order to investigate the digital signal processing requirements. It can be shown that short filters are sufficient for an ASAC System compared to the filter length needed for an AVC system. In the last part of this paper some technical simplifications are investigated in order to reduce the complexity of the sound Radiation filters. It is shown that the high pass filters needed to model the radiation efficiency can be neglected with a very small loss of performance.

elib-URL des Eintrags:https://elib.dlr.de/112952/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Experimental Realization of a Sound Radiation Filter for Feedforward Control to Improve Active Structural Acoustic Control Systems
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Haase, ThomasThomas.Haase (at) dlr.dehttps://orcid.org/0000-0002-9553-9628NICHT SPEZIFIZIERT
Bühmann, HenningTU BraunschweigNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Radestock, MartinMartin.Radestock (at) dlr.dehttps://orcid.org/0000-0002-9918-3315139821642
Monner, Hans PeterHans.Monner (at) dlr.dehttps://orcid.org/0000-0002-5897-2422NICHT SPEZIFIZIERT
Datum:5 Juni 2017
Erschienen in:SAE Noise & Vibration Exhibition
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Verlag:SAE International
Status:veröffentlicht
Stichwörter:Radiation filter, ASAC, Schallabstrahlung, aktive Systeme
Veranstaltungstitel:SAE Noise and Vibration Exhibition
Veranstaltungsort:Grand Rapids, Michigan, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:12 Juni 2017
Veranstaltungsende:15 Juni 2017
Veranstalter :SAE International
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Systeme und Kabine (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Adaptronik
Hinterlegt von: Haase, Thomas
Hinterlegt am:14 Aug 2017 09:46
Letzte Änderung:24 Apr 2024 20:17

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Gestaltung Webseite und Datenbank: Copyright © Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.