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Abstract
SONIC (Self-Optimizing Narrowband Interference Canceller) is an acronym of the recently proposed active noise control algorithm with interesting adaptivity and robustness properties. SONIC is a purely feedback controller, capable of rejecting nonstationary sinusoidal disturbances (with time-varying amplitudes and/or frequencies) in the presence of plant (secondary path) uncertainties. We show that even though SONIC can work reliably without access to the reference signal, when frequency of the disturbance is unknown and possibly time-varying the algorithm can take advantage of such an additional source of information. Unlike the classical feedforward solutions, the reference signal is used only to extract information about the instantaneous frequency of the disturbance. The time advantage, available due to the fact that the acoustic delay in the system is larger than the electrical delay, allows one to incorporate in the control loop the smoothed, and hence more accurate, frequency estimates. This increases the attenuation efficiency of SONIC and widens its operating range - the modified algorithm can be safelyused in the presence of faster frequency changes.
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- Category:
- Conference activity
- Type:
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Title of issue:
- 40th International Congress and Exposition on Noise Control Engineering INTER-NOISE 2011, Osaka, Japan, September 4-7, 2011 strony 1 - 8
- Language:
- English
- Publication year:
- 2011
- Bibliographic description:
- Niedźwiecki M., Meller M.: Self-optimizing narrowband interference canceller - can reference signal help?// 40th International Congress and Exposition on Noise Control Engineering INTER-NOISE 2011, Osaka, Japan, September 4-7, 2011/ Japonia: , 2011, s.1-8
- Verified by:
- Gdańsk University of Technology
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