摘要
为了提高管道噪声主动控制系统的性能 ,设计出基于 TI公司的 TMS32 0 C30芯片作为控制器的实时管道复合噪声主动控制系统 (简称 ANC系统 )。针对前馈 ANC可实现较宽的降噪频带 ,但在实际复杂系统中不能完全满足参考传感器信号和噪声声源要紧密相关要求 ;而反馈 ANC系统中 ,降噪效果不依赖于声场的相关性 ,但其降噪频带较窄的特点 ,设计出复合 FXL MS ANC系统。在某风机、通风管路系统上进行 ANC试验的结果表明 ,应用复合 FXL MS ANC方法 ,能获得比单独使用前馈 FXL MS ANC算法或反馈 FXL MS
In the active noise control(ANC)systems,the feedforward ANC system exhibits fairly good effect on noise suppression at a quite wide band of frequency,but it requires its reference signal to be closely correlated with the signal of its noise source,which is rather difficult to fulfil for practical complex systems;for the feedback ANC system,on the other band,its effect of noise suppression does not depend on the correlation between the two signals,but its effective band of frequency for noise suppression is quite narrow.In order to improve the performance of an ANC system used in a duct,a hybrid ANC system is designed as its controller in the paper based on the chip of TMS320C30 produced by TI company.The results of the ANC tests for a fan duct system indicate that the effect of noise suppression achieved by the hybrid ANC system is better than that achieved by feedforward or feedback ANC system alone.
出处
《振动．测试与诊断》
EI
CSCD
2004年第2期153-156,共4页
Journal of Vibration,Measurement & Diagnosis
