Abstract
This paper presents the feed-forward multichannel active noise control which was simulated on LabVIEW and experimented on two channel feed-forward active noise control in real-time. The simulation of feed-forward multichannel active noise control system was built on LabVIEW by using FxLMS algorithm and other algorithms such as Variable Step-size (VSS) and saturation compensation. Moreover, LMS and VSS LMS algorithm were used to train the secondary path in order to improve the convergence speed and stabilization of ANC system in the real-time. The experimental results show that the ANC system in real-time using variable step-size and without using variable step-size algorithm work effectively with noise sources which were synthesized from one to three frequencies. The noise level in these cases decreased around 12 dB - 35 dB and the noise reduction radius measured is about 3 cm around the microphone.
Highlights
This paper presents the feed-forward convergence speed and stabilization of ANC multichannel active noise control which was system in the real-time
The experimental simulated on LabVIEW and experimented on results show that the ANC system in realtwo channel feed-forward active noise time using variable step-size and without control in real-time
The simulation of feed- using variable step-size algorithm work forward multichannel active noise control effectively with noise sources which were system was built on LabVIEW by using synthesized from one to three frequencies
Summary
Chúng tôi mô phỏng hệ thống khử nhiễu đa kênh truyền thẳng và xây dựng hệ thống khử nhiễu hai kênh thời gian thực. Chúng tôi sử dụng giải thuật filtered-X least-mean-square (FxLMS), và một số giải thuật cập nhật độ lợi (Variable Step-Size - VSS), bổ chính bão hoà nhằm tăng cường hiệu quả cho các hệ thống kiểm soát nhiễu. Chúng tôi đã áp dụng giải thuật LMS (least mean square) và VSS-LMS để huấn luyện hàm truyền thứ cấp nhằm tăng tốc độ hội tụ và ổn định cho các hệ thống kiểm soát nhiễu. Từ khoá: kiểm soát nhiễu tích cực, cập nhật độ lợi, LMS, filtered-x LMS
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