一种自适应模拟舰船噪声重构方法

提出了一种自适应模拟噪声重构方法(AMNR-Adaptive Modeling Noise Reconstruction)。该方法将噪声重构过程看作未知被控连续输入、输出系统,在已知系统输入、输出特性的情况下,采用自适应模拟技术建立并在线自适应修正噪声重构系统的传输函数,实现了通过高斯随机序列对舰船噪声的重构和任意长度重构噪声波形的连续输出。实测舰船噪声重构应用实例表明,本文所提方法重构误差小、实现方便,且重构噪声波形具有连续相位,从而解决了因重构噪声非连续输出带来的带内能量泄漏和功率谱随机波动等问题。

A ship noise reconstruction method using adaptive modeling

A new method using adaptive modeling for ship noise reconstruction (AMNR) is proposed. The noise reconstruction is regarded as a kind of black box (or the False Noise Reconstruction System-FNRS) processing. In the case that the input and output signal features of FNRS are given,this method realizes the noise reconstruction process via rebuilding the FNRS transmission function online. The realiza-tion method of ship noise reconstruction is also presented which has the same source level and 1/3 octave spectrum as the original. Furthermore,the reconstructed noise sequences are with continuous phase.