主动噪声控制技术在工业换风扇降噪中的应用

Application of Active Noise Control Technique in Noise Reduction System of Industrial Exhaust Fan

指出了换风扇噪声主要是由风叶旋转时的通频及其低次谐频成分构成 ,应用主动噪声控制技术能够有效地抑制这些离散频率上的声音。笔者设计了一具有 4个误差输入和两个抵消输出的自适应控制系统 ,并应用于换风扇噪声控制上 。

The noise of exhaust fan is mainly consisted of pass frequency & low second harmonic frequency when blade is rotating. Noises on discrete frequency can be efficiently controled by using active noise control technique. A self control system which has 4 error input & 2 counteracting output is designed by the author. The satisfied result is obtained by using it on noise control system of exhaust fan.