This paper investigates the application of active structural acoustic control (ASAC) to the radiating panel of a double panel system, modeling the interior trim of an aircraft. The application of control inputs to the interior trim (radiating panel) has distinct advantages. There is likely to be no increase in fuselage vibrational energy. Design of the panel can be changed to be more conducive to a higher transmission loss. Panels can be removed allowing facilitated installation and repair of sensors and actuators. The technique used is the active structural acoustic control (ASAC) approach where control inputs, in the form of piezoelectric actuators, were applied to the structure while the radiated pressure field was minimized. Results indicate the application of control inputs to the radiating panel resulted in greater transmission loss due to its direct effect on the nature of the structural-acoustic coupling between the radiating panel and the receiving chamber. Increased control performance was seen in a double panel system consisting of a stiffer radiating panel with a lower modal density. As expected, more effective control of a radiating panel excited on-resonance is achieved over one excited off-resonance. In general, the results validate the ASAC approach for double panel systems and demonstrate that it is possible to take advantage of double panel behaviour to enhance control performance, although it is clear that further research must be done to understand the physics involved.
Active structural acoustic control of noise transmission through double panel systems
Aktive struktur-akustische Regelung der Schallübertragung durch ein doppelwandiges Plattenfeld
AIAA Journal ; 33 , 4 ; 618-623
1995
6 Seiten, 8 Bilder, 7 Tabellen, 15 Quellen
Aufsatz (Zeitschrift)
Englisch
Platte (Bauteil) , Schallübertrager , Schallemission , Bläsertriebwerk , Flugzeug , Flugzeugrumpf , Schwingungsdämpfung , Sensor , Stellantrieb , Steifigkeit , piezoelektrisches Bauelement , Druckregler , Schallmessung , Resonanzfrequenz , Schwingungsverhalten , Vergleichsmessung , Versuchsanlage , Adaptivregelung , Position , aktive Regelung
Active Structural Acoustic Control of Noise Transmission Through Double Panel Systems
Online Contents | 1995
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