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Title: Robust virtual sensors for vibro-acoustic applications using structural sensing
Authors: Halim, D
Cheng, L 
Su, ZQ 
Keywords: Robust filtering
Structural sensing
Vibro-acoustic systems
Virtual sensors
Issue Date: 2010
Source: 39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010, 2010, v. 6, p. 4617-4626 (CD) How to cite?
Abstract: The work was aimed to develop a robust virtual sensing method for vibro-acoustic applications without the use of acoustic sensors. Sound pressures inside a vibro-acoustic enclosure were estimated from structural sensors by utilizing the effect of fluid-structural coupling. A structural sensor placement method was developed using the averaged sensor output energy of a vibro-acoustic system excited by a spatially-varying point source. It was found that the observability level of cavity-controlled mode is influenced by the modal coupling and resonance frequency of uncoupled structural modes. Robust filtering was used to develop virtual sensors that were robust against certain dynamic uncertainties in the vibroacoustic system. Virtual sensing performance was numerically investigated on a coupled panel-cavity system, which demonstrated superior sensing performance of robust virtual sensors compared to that of standard virtual sensors. Therefore the proposed virtual sensing method allows the use of compact structural sensors, instead of potentially bulky acoustic sensors, for sensing and active control applications of vibro-acoustic systems.
Description: 39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010, Lisbon, 13-16 June 2010
ISBN: 9781617823961
Appears in Collections:Conference Paper

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