Robust virtual sensors for vibro-acoustic applications using structural sensing

Dunant Halim, Li Cheng, Zhongqing Su

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


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.
Original languageEnglish
Title of host publication39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010
Number of pages10
Publication statusPublished - 1 Dec 2010
Event39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010 - Lisbon, Portugal
Duration: 13 Jun 201016 Jun 2010


Conference39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010


  • Robust filtering
  • Structural sensing
  • Vibro-acoustic systems
  • Virtual sensors

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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