自适应逆控制FXLMS算法有源噪声控制仿真研究

前馈有源噪声控制方法可在较宽的频带有效,使之获得了广泛的应用.在前馈有源噪声控制中,直接使用传统的FXLMS算法时,由于次级通道传递函数往往是非最小相位系统,导致系统的性能下降.文中提出一种基于非最小相位系统逆控制的自适应前馈有源噪声控制FXLMS算法,用带宽随机噪声信号和实测风机通风管道噪声信号进行仿真实验研究,结果表明,较传统的FXLMS算法有明显的改进.

A NMP adaptive inverse control based on FXLMS algorithm applied in active noise control

The feedforward control has become the widely used technique in active noise control because it can provide wider control bandwidth. In the feedforward active noise control, owing to the fact that the secondary-path transfer function is commonly non-minimum phase system, it may lead to the performance degradation when the traditional FXLMS algorithm is applied directly. A non-minimum phase adaptive inverse control based on FXLMS algorithm is proposed. In the computer simulation research, the bandwidth random noise and the practical noise in a fan duct are used as primary noise respectively. The simulation shows that the proposed algorithm has advantage over standard FXLMS algorithm.