Optimal feedback control of broadband sound radiation from a rectangular baffled panel has been investigated through computer simulations. Special emphasis has been put on the sensitivity of the optimal feedback control to uncertainties in the modelling of the system under control.A model of a rectangular baffled panel radiating into free field has been constructed. Secondary actuators have been modelled as vibrational inputs acting directly on the panel. A cost function proportional to the averaged radiated sound power and based on knowledge of the modal amplitudes of the panel has been derived in terms of a set of radiation filters modelling the radiation dynamics.Linear quadratic feedback control applied to the panel in order to minimise the radiated sound power has then been simulated. The sensitivity of the model based controller to modelling uncertainties when using feedback from actual and estimated states (via a state observer) has been examined.
|Title of host publication||Proceedings of the 1997 International Symposium on Active Control of Sound and Vibration|
|Place of Publication||Budapest|
|Publisher||Scientific Society for Optics, Acoustics, Motion Pictures and Theater Technology, Publishing Company of Technical University of Budapest|
|Publication status||Published - 1997|
|Event||Active 97 - Budapest, Hungary|
Duration: 21 Aug 1997 → 23 Aug 1997
|Period||21/08/1997 → 23/08/1997|
Mørkholt, J. (1997). Sensitivity to plant modelling uncertainties in optimal feedback control of sound radiation from a panel. In Proceedings of the 1997 International Symposium on Active Control of Sound and Vibration (pp. 893-904). Scientific Society for Optics, Acoustics, Motion Pictures and Theater Technology, Publishing Company of Technical University of Budapest.