頁籤選單縮合
題名 | A Constrained Algorithm for Active Noise Control System with Headset Implementation= |
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作者 | Lin, Chin E.; Hsiao, An-Chih; Huang, Chih-Hua; |
期刊 | Journal of Aeronautics, Astronautics and Aviation. Series A |
出版日期 | 20070600 |
卷期 | 39:2 2007.06[民96.06] |
頁次 | 頁109-115 |
分類號 | 448.942 |
語文 | eng |
關鍵詞 | Active noise control; Adaptive filter; Adaptive algorithm; FxLMS algorithm; |
英文摘要 | A selection detector in adaptive algorithm with weight constrained method for active noise control (ANC) is presented in this paper. Imposing weight constraints to the adaptation of the adaptive filter will effectively avoid over-updated phenomenon, such as a large movement of microphone or the sudden variations of the surrounding environment. It can easily be added in the adaptive procedure and will not burden heavily with complex computation. The section of the weight constraint factor is prominent because a large weight constraint factor givers less constraint to the update of adaptive filter, whereas a small weight constraint factor may cause constraint of the update strictly. The selection detector is proposed to reduce the seeking time of weight constrained factors by imposing weight constrained factors by imposing weight constraints to allocate the adaptive filter to effectively avoid over-updates phenomenon when there is a sudden large change in the original signal. From the selection detector block, these three weight constraint factors can be chosen appropriately to the minimum values of mean square error. The analysis gives useful information about preventing the adaptation from updating by the wrong learning and the robustness of the entire ANC system is improved in this paper. The results are verified to show that effectiveness through the computer simulations in this paper. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。