多通道反馈主动噪声分布控制系统的实现

Implementation of Decentralized Multichannel Feedback Active Noise Control

在主动噪声控制领域普遍使用前馈控制,但是其要求能够获得有效的参考信号,因此在许多不能得到有效参考信号的情况下,只能选择反馈控制。相比于单通道系统,虽然多通道主动噪声控制具有更优的降噪性能,但是存在着计算负荷较大的不足,采用分布式控制是一种简单易行的解决办法。实验结果表明分布式多通道反馈主动控制具有良好的降噪性能。

In the field of active noise control, feedforward controllers are widely used when effective reference signals can be acquired. But in some cases, it is difficult to get effective reference signals. Thus, feedback controller is necessary. To control complex sound fields, multi-channel controllers are needed to handle the large number of sensors and actuators. In comparison with the single channel system, multi-channel active noise control possesses better performance for noise reduction. But it is computer time consuming. Decentralized control is a simple approach to solve this issue. The experimental results show that the decentralized multi-channel feedback active noise control is effective for noise reduction.