Active vibroacoustic control of plate structures with arbitrary boundary conditions
PBN-AR
Instytucja
Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
IPPT REPORTS
ISSN
2299-3657
EISSN
Wydawca
DOI
Rok publikacji
2013
Numer zeszytu
Strony od-do
5-9
Numer tomu
4a
Identyfikator DOI
Liczba arkuszy
0,6
Autorzy
Słowa kluczowe
EN
Vibrating plate structures
Active feedback control system
Vibrational modes
Streszczenia
Język
EN
Treść
The paper describes briefly some main aspects of the active feedback control system that has been developed and constructed for reduction of vibroacustic emission of vibrating plate structures with arbitrary boundary conditions. Relations between the forms and frequency of the vibrations induced by an external harmonic excitation and the distribution of the generated acoustic pressure field are investigated using the developed numerical model based on the Indirect Variational Boundary Element Method. The aim of the control is to minimize the sound pressure level in a given point of the ambient space. The system uses small, rectangle-shaped piezoelectric transducers as both sensors and actuators. The transducers are connected in a number of independent feedback loops, and the feedback gains are the control parameters which are optimized using the developed optimal control algorithm. The constructed active system has been tested for the stability and control performance during experimental research performed in an anechoic chamber. Results of experiments are presented in the paper, proving a high level of noise reduction and a good agreement with numerical predictions.
Cechy publikacji
original-article
Inne
System-identifier
2358