柴油机排气噪声有源控制的试验研究 郭文勇 黄映云 朴甲哲 摘 要:尝试利用自适应有源噪声控制技术对4-85柴油机低频噪声进行空间消声,取得了一定的消声效果。首先对4-85柴油机排气噪声频谱进行了分析,然后提出了针对此低频排气噪声应用有源噪声控制技术的可能性。其次讨论了妨碍应用有源噪声控制技术的三大困难,并找出了解决方法。引入次级声场的理论推导并完成了引入次级声场装置的设计、制造。通过对排气噪声信号与排气管上不同位置振动信号的相干性分析,选取参考输入信号,提出了采用自适应有源噪声控制技术,为试验提出了依据,对系统进行了建模并编程,对试验结果进行了记录并分析。 Experimental Study for Active Control of a Diesel Exhaus t Noise GUO Wen-yong(Power Engineering Department,Naval University of Engin
eering,Wuhan 430033) Abstract:Adaptive active noise
control technique has been used to attenuate the low-frequency exhaust noise of a diesel
(4-85) and certain attenuation has been achieved in this thesis.Firstly,frequency
characteristics of exhaust noise of diesel (4 - 85) are analyzed,thus,the possibility of
using active noise control technique on such low-frequency exhaust noise is
offered.Secondly,three main difficulties o f hampering the usage of active noise control
technique are discussed and the ways to solve are also found out.Then,the design and
manufacture of a set of secondary source are finished.The coherence of exhaust noise
signals and vibration signals of different points on exhaust duct are analyzed,so,the
reference input signals is chosen.The adaptive active noise control technique which is put
forward h as been expounded,and it supplies the experimental basis on which a system model
is built and computer program is programmed.Finally,the experiment result has been
recorded and analyzed at last,a sum-up work has been done. |
| 作者简介:郭文勇(1970-),男,博士生,主要研究方向为有源消声、机械状态监测及故障诊断。
作者单位:郭文勇(海军工程大学动力工程系,武汉 430033) 黄映云(海军工程大学动力工程系,武汉 430033) 朴甲哲(海军工程大学动力工程系,武汉 430033) 参考文献: [1]HAYASHI Yoichiro,NISHIMURA Masaharu.柴油机排气噪声的有源噪声控制[J].柴油机,1998,(6):35~37. 收稿日期:2000年1月4日 修稿日期:2000年3月14日 出版日期:2001年1月1日 |