发动机排气噪声自适应有源消声系统的设计与试验研究  

Design and Experimental Study of Adaptive Active Control System for Engine Exhaust Noise

作　　者：伊善贞[1] 费仁元[1] 周大森[1] 吴斌[1] 刘太文[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100022

出　　处：《内燃机工程》2005年第1期59-62,共4页Chinese Internal Combustion Engine Engineering

基　　金：北京市自然科学基金项目(编号3002004)

摘　　要：针对发动机排气噪声的特点,选取与噪声基频相关的振动和点火信号作为控制器参考信号,以Filtered X LMS算法作为调节自适应滤波器各权系数的基本依据,并采用外加抖动信号的次级通道在线自适应建模方式,建造并实现了相应的试验系统。在所设计的有源消声试验台架上,对SUZUKI AX 100摩托车发动机排气噪声进行了有源消声试验,在 400 Hz以下取得了 30 dB以上的降噪效果。A narrowband feedforward adaptive active control system for engine exhaust noise is proposed according to the characteristics of the engine exhaust noise. It uses the vibration or firing signal as the reference signal for the controller. The filtered-X LMS adaptive algorithm is used to update the coefficients of the controller. An auxiliary random noise generator is used to perform continuous on-line modeling of, the secondary path, and the LMS adaptive algorithm is used for updating the coefficients of the identification filter. A set of experimental system is implemented and the computer programs are programmed. An active control test for a SUZUKI AX-100 motorcycle engine exhaust noise is carried out on this set, and over 30dB noise reduction is achieved below the frequency of 400 Hz.

关 键 词：内燃机 有源消声 自适应噪声主动控制 排气 消声器 

分 类 号：TK403[动力工程及工程热物理—动力机械及工程]