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標題: 可變步階的串聯演算法於主動噪音控制系統之應用
Active Noise Control Systems Using Variable Step-Size Cascading Algorithm
作者: 簡家安
Jian, Jia-An
關鍵字: active noise control (ANC);主動噪音控制;disturbance;variable step size;干擾;可變步階
出版社: 機械工程學系所
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In an active noise control (ANC) system, disturbance picked up by the error microphone will affect weights update of an adaptive filter and destroy ANC performance. To deal with the disturbance, an approach is to cascade an additional adaptive filter to the ANC system. The cascaded adaptive filter is used as an identifier to model the primary path on-line and obtain an estimate of the disturbance such that influence of the disturbance can be reduced. Since constant step sizes are used in the approach, ANC performance must be trade-off between convergence rate and steady-state error. A variable step-size cascading algorithm is thus proposed in this study to overcome this difficulty. Results of computer simulations demonstrate effectiveness of the proposed algorithm in reducing the effect of disturbance such that improved ANC performance in terms of fast convergence rate and steady-state error can be achieved. Experiments verify results of ANC simulation and support the feasibility of the proposed algorithm in real ANC applications.
其他識別: U0005-1808201013295800
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