New FIR filter-based adaptive algorithms incorporating with commutation error to improve active noise control performance

Automatica ◽  
2007 ◽  
Vol 43 (2) ◽  
pp. 325-331 ◽  
Author(s):  
Ching-Wen Liao ◽  
Jong-Yih Lin
Keyword(s):  
Noise Control ◽  
Active Noise Control ◽  
Adaptive Algorithms ◽  
Fir Filter ◽  
Control Performance ◽  
Active Noise

Singular vector filtering method for mitigation of disturbance enhancement in multichannel active noise control systems

2021 ◽  
Vol 69 (5) ◽  
pp. 451-459
Author(s):  
Yongjie Zhuang ◽  
Xuchen Wang ◽  
Yangfan Liu
Keyword(s):  
Noise Control ◽  
Active Noise Control ◽  
Singular Values ◽  
Control Performance ◽  
Frequency Bands ◽  
Singular Vectors ◽  
Singular Value Decomposition Method ◽  
Autocorrelation Matrix ◽  
Frequency Responses ◽  
Active Noise

In the design of multichannel active noise control filters, the disturbance enhancement phenomenon will sometimes occur, i.e., the resulting sound is enhanced instead of being reduced in some frequency bands, if the control filter is designed to minimize the power of error signals in other frequency bands or across all frequencies. In previous work, a truncated singular value decomposition method was applied to the system autocorrelation matrix to mitigate the disturbance enhancement. Some small singular values and the associated singular vectors are removed, if they are responsible for unwanted disturbance enhancement in some frequency bands. However, some of these removed singular vectors may still contribute to the noise control performance in other frequency bands; thus, a direct truncation will degrade the noise control performance. In the present work, through an additional filtering process, the set of singular vectors that causes the disturbance enhancement is replaced by a set of new singular vectors whose frequency responses are attenuated in the frequency band where disturbance enhancement occurs, while the frequency responses in other frequency bands are unchanged. Compared with truncation approach, the proposed method can maintain the performance in the noise reduction bands, while mitigating the influence in disturbance enhancement bands.

Adaptive IIR Filter Using Variable Step Size for Active Noise Control Inside a Short Duct

2008 ◽  
Author(s):  
Ho-Wuk Kim ◽  
Sang-Kwon Lee
Keyword(s):  
Control System ◽  
Noise Control ◽  
Active Noise Control ◽  
Fir Filter ◽  
Variable Step Size ◽  
Step Size ◽  
Iir Filter ◽  
Active Noise ◽  
Lms Filter ◽  
Variable Step

FIR filter for a adaptive filter algorithm, is mostly used for an active noise control system. However, FIR filter needs to have more large size of the filter length than it of IIR filter. Therefore, the control system using FIR adaptive filter has slow calculation time. In the active noise control system of the short duct, the reference signal can be affected by the output signal, so IIR filter for ARMA system can be more suitable for the active noise control of the short duct than FIR filter for MA system. In this paper, the recursive LMS filter, which is adaptive IIR filter, is applicated for the active noise control inside the short duct. For faster convergence and more accurate control, a variable step size algorithm is introduced for this recursive LMS filter (R-VSSLMS filter). Using this algorithm and considering the secondary path, the filtered-u R-VSSLMS is conducted successfully on the real experiment in the short duct. The performance of the active control using the filtered-u R-VSSLMS filter, is compared with the performance of the active control using a filtered-x LMS filter.

Improved active noise control performance based on Laguerre lattice

2004 ◽  
Vol 84 (4) ◽  
pp. 695-707 ◽  
Author(s):  
S. Veena ◽  
S.V. Narasimhan
Keyword(s):  
Noise Control ◽  
Active Noise Control ◽  
Control Performance ◽  
Active Noise

scholarly journals 1018 Control Performance of Directional Sources in Active Noise Control for Ducts

2008 ◽  
Vol 2008.45 (0) ◽  
pp. 363-364
Author(s):  
Naoki JINBO ◽  
Yasuhide KOBAYASHI
Keyword(s):  
Noise Control ◽  
Active Noise Control ◽  
Control Performance ◽  
Active Noise

scholarly journals Performance Analysis of Feed Forward Broadband Active Noise Control System using Adaptive Algorithms

IJIREEICE ◽  
2015 ◽  
Vol 3 (6) ◽  
pp. 135-139
Author(s):  
T. Koteswara Rao ◽  
B.Bhaskara Rao
Keyword(s):  
Control System ◽  
Performance Analysis ◽  
Noise Control ◽  
Active Noise Control ◽  
Adaptive Algorithms ◽  
Feed Forward ◽  
Active Noise

Active Control of High Order Acoustical Modes in a Semi-Infinite Waveguide

1991 ◽  
Vol 113 (4) ◽  
pp. 523-531 ◽  
Author(s):  
J. D. Stell ◽  
R. J. Bernhard
Keyword(s):  
Control Systems ◽  
Active Control ◽  
Noise Control ◽  
Active Noise Control ◽  
High Order ◽  
Control Methods ◽  
Control Performance ◽  
Secondary Sources ◽  
Active Noise ◽  
New Finding

This paper presents an analysis of the effectiveness of active noise control methods for control of high order modes in rigid-walled, semi-infinite waveguides. The waveguides examined in this investigation are terminated at one end with a rigid end. The case studies performed reconfirmed that n control actuators can control n propagating modes (including the plane wave) in a waveguide if the actuators are properly placed. The results also confirmed that the control actuators should be located at the node surfaces of the most significant evanescent modes to avoid various problems that evanescent modes cause active control systems. A significant new finding is the effect of the rigid waveguide termination on the active controller. The reflected energy from the termination causes standing waves in the region between the rigid termination and the secondary sources. At certain frequencies which correspond to resonant conditions, the standing wave amplitudes become large and the control actuator strength must be high. At these frequencies the effects of the evanescent modes become significant even when the mode is not close to its cut-on frequency. Similar resonant effects can be expected to affect active noise control performance for any case where there are significant reflections in the waveguide upstream of the control actuators.

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