反馈有源噪声控制系统水床效应的分析与改善

本文依据反馈有源噪声控制原理分析了水床效应存在机理,以一模拟反馈有源噪声控制系统作为实例介绍了水床效应的分析方法,提出了通过展宽噪声放大频段和均匀噪声放大频段内的噪声放大量来优化反馈控制器,改善水床效应的方法。采用数字反馈控制器实现了水床效应的改善,给出了具体设计过程,并且考虑了数字时延对系统性能影响。仿真和实验表明了所提出方法的有效性。

Analysis and improvement on waterbed effect of feedback active noise control system

This paper analyzes the mechanism of waterbed effect based on the principles of the feedback active noise control by using an analog feedback active noise control system.An approach to reduce the waterbed effect is proposed by broadening the frequency band of noise amplification and flatting the noise amplification in the whole band.Finally,a digital filter design process to reduce the waterbed effect is presented,which takes into account the effects of the digital delay on system performance.Simulation and...