Algermissen Misol 2020a - Revision history

Scipediacontent at 16:37, 17 February 2021

2021-02-17T16:37:27Z

Scipediacontent at 08:30, 16 February 2021

2021-02-16T08:30:33Z

Scipediacontent: Scipediacontent moved page Draft Content 237021352 to Algermissen Misol 2020a

2021-02-16T08:25:19Z

Scipediacontent moved page Draft Content 237021352 to Algermissen Misol 2020a

Scipediacontent: Created page with " == Abstract == The participants of the EU-project ACASIAS develop advanced concepts for aerostructures with multifunctional capabilities. Within work package 3 an active sys..."

2021-02-16T08:25:15Z

Created page with " == Abstract == The participants of the EU-project ACASIAS develop advanced concepts for aerostructures with multifunctional capabilities. Within work package 3 an active sys..."

New page

== Abstract ==

The participants of the EU-project ACASIAS develop advanced concepts for aerostructures with multifunctional capabilities. Within work package 3 an active system for noise
reduction is integrated into a curved lining panel. The objective is the reduction of the interior
sound pressure level by increasing the transmission loss of the lining panel. The application
scope includes current propeller driven aircraft and future aircraft with counter-rotating open
rotor (CROR) engines. The drawback of these CO2-efficient engines is their high sound emission in the frequency band up to 500 Hz. Active noise reduction systems are able to achieve
performance in this frequency band while passive sound insulation materials fall behind. Thus,
active systems are the key technology to avoid unacceptably high noise levels for passengers.
During the last period of the project the main experiments are conducted. The active lining
with its dimensions of 1300 × 1690 mm2
(W × H) is mounted in a setup in the acoustic transmission loss test facility of the DLR. Several tests in different categories are run to characterize
the vibration and sound transmission behavior of the lining. In this paper the active lining and
its components are briefly introduced and the results of the modal and the thermal testing are
presented.

== Full document ==
<pdf>Media:Draft_Content_237021352-P_IDC5_40-5062-document.pdf</pdf>

== References ==

[1] S. Algermissen, M. Misol, A. Kokott, T. Haase, K. Gonet, and V. Lungaho, “Towards a lining integrated active structural acoustic control system,” in ''Proc. of European Conference on Multifunctional Structures (EMuS)'', X. Martinez and H. Schippers, Eds., Juni 2019, pp. 30–37. [Online]. Available: [https://elib.dlr.de/127884/ https://elib.dlr.de/127884/]

[2] M. Misol and S. Algermissen, “Remote sensing for a lining integrated structural acoustic control system,” in ''Proc. of European Conference on Multifunctional Structures (EMuS)'', X. Martinez and H. Schippers, Eds., Barcelona, Spain, 2019. [Online]. Available: [https://elib.dlr.de/128067/ https://elib.dlr.de/128067/]

[3] ——, “Noise reduction results of the ACASIAS active lining panel,” in ''Proc. of EuropeanConference on Multifunctional Structures (EMuS)'', X. Martinez and H. Schippers, Eds., 2020.

[4] European Organisation for Civil Aviation Equipment (EUROCAE), ''EUROCAE ED-14G: Environmental Conditions and Test Procedures for Airborne Equipment''. EUROCAE, 2011.

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 == Full document ==
-<pdf>Media:Draft_Content_237021352-P_IDC5_40-5062-document.pdf</pdf>
+<pdf>Media:Algermissen_Misol_2020a_4727_P_IDC5_40.pdf</pdf>
-−
 == References ==

@@ Line 2: / Line 2: @@
 == Abstract ==
-The participants of the EU-project ACASIAS develop advanced concepts for aerostructures with multifunctional capabilities. Within work package 3 an active system for noise
+The participants of the EU-project ACASIAS develop advanced concepts for aerostructures with multifunctional capabilities. Within work package 3 an active system for noise reduction is integrated into a curved lining panel. The objective is the reduction of the interior sound pressure level by increasing the transmission loss of the lining panel. The application scope includes current propeller driven aircraft and future aircraft with counter-rotating open rotor (CROR) engines. The drawback of these CO<sub>2</sub>-efficient engines is their high sound emission in the frequency band up to 500 Hz. Active noise reduction systems are able to achieve performance in this frequency band while passive sound insulation materials fall behind. Thus, active systems are the key technology to avoid unacceptably high noise levels for passengers. During the last period of the project the main experiments are conducted. The active lining with its dimensions of 1300 × 1690 mm<sup>2</sup> (W × H) is mounted in a setup in the acoustic transmission loss test facility of the DLR. Several tests in different categories are run to characterize the vibration and sound transmission behavior of the lining. In this paper the active lining and its components are briefly introduced and the results of the modal and the thermal testing are presented.
 reduction is integrated into a curved lining panel. The objective is the reduction of the interior
 sound pressure level by increasing the transmission loss of the lining panel. The application
 scope includes current propeller driven aircraft and future aircraft with counter-rotating open
-rotor (CROR) engines. The drawback of these CO2-efficient engines is their high sound emission in the frequency band up to 500 Hz. Active noise reduction systems are able to achieve
 performance in this frequency band while passive sound insulation materials fall behind. Thus,
 active systems are the key technology to avoid unacceptably high noise levels for passengers.
 During the last period of the project the main experiments are conducted. The active lining
-with its dimensions of 1300 × 1690 mm2
 (W × H) is mounted in a setup in the acoustic transmission loss test facility of the DLR. Several tests in different categories are run to characterize
 the vibration and sound transmission behavior of the lining. In this paper the active lining and
 its components are briefly introduced and the results of the modal and the thermal testing are
 presented.
 == Full document ==

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