考虑约束的频域算法在有源噪声控制中的应用

An Efficient Frequency-Domain LMS Algorithm with Constraints on the Active Noise Control

有源噪声控制广泛应用于中低频噪声控制中。传统的有源控制都是在时域内使用LMS算法进行控制。使用频域算法可以提高LMS算法的收敛速度。频域算法的优点不仅仅是提高LMS算法的收敛速度,而且可以方便地加入频域约束。从最基本的性能函数出发,根据实际的需要和目的,作出不同的性能函数,然后根据最速下降法和LMS算法,推导出相应的频域LMS算法。从实验结果可以看出:频域算法比时域算法具有更多的优势。

Active Noise Control(ANC)are widely applied in low frequency noise.Traditional methods are using LMS algorithm in time-domain.The frequency-domain algorithm not only increases the convergence speed of LMS algorithm,but can be conveniently added frequency constraints.In this paper,it is from the performance function,based on the requirement and purpose,to derive the frequency-domain LMS algorithm which considering the frequency-domain constraints.The eventual experimental results showed that:Frequency-domain algorithm has more advantages than time-domain algorithm.