摘要
本文在对车辆发动机试验室噪声特性分析的基础之上,提出采用自适应有源控制的方法,来降低控制室内发动机噪声。建立了自适应控制模型,计算机仿真可取得较大降噪量,最后建立起以高速DSP芯片为核心的实时自适应控制系统,实际降噪效果较好,对稳态噪声可取得10dB以上降噪量,所采用的方法对于强噪声环境下封闭空间有源噪声控制具有应用价值。
In this paper, a real time adaptive noise control system is set up based on the analysis of the noise characteristic in engine testing and its control rooms. The nucleus of this system is a high speed signal processor TMS 320C25. In order to reduce the noise in control room, the noise of the test room is used as the reference signal. The computer simulation and the experiment result show that this system can reduce the steady noise by more than 10dB. For unsteady noise it can achieve 4 ~ lOdB reduction. The system can be used for Practical noise control in enclosed space.
出处
《汽车工程》
EI
CSCD
北大核心
1997年第2期72-77,共6页
Automotive Engineering
基金
高等学校博士学科点专项科研基金
