摘要
前馈有源噪声控制(active noise control,ANC)方法可在较宽的频带有效。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(non-minimum phase,NMP),导致系统的性能下降。本文提出一种基于NMP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作为噪声源进行仿真实验研究,在一通风管道上进行了实时ANC实验,结果表明较传统的FXLMS算法有明显的改进。
The feedforward ANC(Active Noise Control) is effective to attenuate wide-band acoustic noise, and therefore has wide applications. In the feedforward ANC, when the traditional FXLMS algorithm is applied directly, non-minimum phase (NMP) of the secondary-path transfer function leads to the performance degradation. In this paper a NMP adaptive inverse-control-based FXLMS algorithm is proposed. The computer simulation is carried out using bandwidth random noise as primary noise, and the real-time experiment on a ventilating duct are also made. The results show that the proposed algorithm has advantage over standard FXLMS algorithm.
出处
《振动工程学报》
EI
CSCD
北大核心
2003年第3期331-334,共4页
Journal of Vibration Engineering
