Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6624
Title: Virtual sensors for active noise control in acoustic-structural coupled enclosures using structural sensing : part II—optimization of structural sensor placement
Authors: Halim, D
Cheng, L 
Su, Z 
Keywords: Acoustic fields
Acoustic noise
Acoustic variables control
Acoustic wave propagation
Active noise control
Enclosures
Numerical analysis
Observability
Resonance
Sensors
Issue Date: Apr-2011
Publisher: Acoustical Society of America
Source: Journal of the Acoustical Society of America, Apr. 2011, v. 129, no. 4, p. 1991-2004 How to cite?
Journal: Journal of the Acoustical Society of America 
Abstract: The work proposed an optimization approach for structural sensor placement to improve the performance of vibro-acoustic virtual sensor for active noise control applications. The vibro-acoustic virtual sensor was designed to estimate the interior sound pressure of an acoustic-structural coupled enclosure using structural sensors. A spectral-spatial performance metric was proposed, which was used to quantify the averaged structural sensor output energy of a vibro-acoustic system excited by a spatially varying point source. It was shown that (i) the overall virtual sensing error energy was contributed additively by the modal virtual sensing error and the measurementnoise energy; (ii) each of the modal virtual sensing error system was contributed by both the modal observability levels for the structural sensing and the target acoustic virtual sensing; and further (iii) the strength of each modal observability level was influenced by the modal coupling and resonance frequencies of the associated uncoupled structural/cavity modes. An optimal design of structural sensor placement was proposed to achieve sufficiently high modal observability levels for certain important panel- and cavity-controlled modes. Numerical analysis on a panel-cavity system demonstrated the importance of structural sensor placement on virtual sensing and active noise control performance, particularly for cavity-controlled modes.
URI: http://hdl.handle.net/10397/6624
ISSN: 0001-4966
DOI: 10.1121/1.3552873
Rights: Copyright 2011 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.
The following article appeared in Halim, D., Cheng, L., & Su, Z. (2011). Virtual sensors for active noise control in acoustic-structural coupled enclosures using structural sensing: Part II-optimization of structural sensor placement. Journal of the Acoustical Society of America, 129(4), 1991-2004 and may be found at http://scitation.aip.org/content/asa/journal/jasa/129/4/10.1121/1.3552873.
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