柴油机排气噪声有源控制仿真研究

A Simulation Study on Adaptive Control of Diesel Exhaust Noise

针对柴油机排气噪声设计了一套有源消声系统 ,并对高速数字信号处理芯片为基础的控制单元进行了仿真试验。该系统采用了转速信号作为次级声源输入 ,并以自适应同频多谐波滤波为控制模型 ,保证了系统的有效性和稳定性。仿真结果表明 ,本系统有很好的消声效果。

This paper describe the development of an adaptive noise control system to reduce diesel exhaust noise,and the simulated test based on a digital signal processor.The rate of diesel's shaft is used as the input signal of secondary sound source,and an adaptive syn frequency multi harmonic filter is adapted as control model.It is shown that the system has a good effectiveness and convergence.A significant noise reduction is obtained.This studies is useful for further practical application.