A two-stage Wiener filter based multi-channel feedback virtual microphone acoustic noise reducing system

• Autorzy: Pawełczyk M.
• Języki publikacji: EN

Abstrakty

EN

An optimal fixed-parameter control system capable to generate zones of quiet at a number of desired locations is designed and analysed in this paper. Although it is of feedback structure the design problem is reformulated so that theWiener filter approach can be applied. Polynomial technique is used. Due to non-minimum phase character of the plant including delays it requires performing the inner-outer factorization of a polynomial matrix and the causal-anticausal decomposition. For this control system two stages of operation can be distinguished. Experimental verification confirms that the zones of quiet are correctly distributed. Moreover, the control system remains stable for significant changes of the plant.

Słowa kluczowe

EN

active noise control; multi-channel feedback control; optimal control; virtual microphone

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2007
• Tom: Vol. 32, No. 4
• Strony: 917--922
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Pawełczyk M.

• Silesian University of Technology Institute of Automatic Control, Akademicka 16, 44-101 Gliwice, Poland

Bibliografia

• [1] TSENG W. K., RAFAELY B., ELLIOTT S. J., Performance limits and real-time implementation of a virtual microphone active headrest, [in:] Proc. ACTIVE'02, pp. 1231-1242, Southampton, UK 2002.
• [2] PAWELCZYK M., Design and analysis of a virtual-microphone active noise control system, [in:] Proc. 12th Int. Congress on Sound and Vibration, CD edition, Lisbon 2005.
• [3] PAWELCZYK M., Feedback Control of Acoustic Noise at Desired Locations, Silesian University of Technology Press, Gliwice 2005.
• [4] RAFAELY B., Feedback Control of Sound, PhD. thesis, University of Southampton, Southampton 1997.
• [5] KESTELL C., CAZZOLATO B., HANSEN C., Active noise control in a free field with a virtual microphone and a virtual energy density sensor, Journal of the Acoustical Society of America, 48, 4, 475-483 (1999).
• [6] KESTELL C., HANSEN C., CAZZOLATO B., Active noise control with virtual sensors in a long narrow duct, International Journal of Acoustics and Vibration, 5, 2, 63-76 (2000).
• [7] ELLIOTT S. J., Signal Processing for Active Control, Academic Press, London 2001.
• [8] MORARI M., ZAFIRIOU E., Robust Process Control, Prentice-Hall, New Jersey 1989.
• [9] RAFAELY B., GARCIA–BONITO J., ELLIOTT S. J., Feedback control of sound in headrest, [in:] Proc. ACTIVE'97, pp. 445-456, Budapest, Hungary 1997.