自适应线谱增强器的改进及实现

针对舰船辐射噪声中线谱检测及提取难问题,研究了基于矢量水听器的自适应线谱增强器。利用矢量水听器同步、同点测量声场的声压和振速的特点,将传统自适应线谱增强器改进为双输入结构,由于所测声压信号与振速信号间的相关性,提高了线谱增强的效果。通过实测数据对改进算法进行了验证,并在Simulink中的DSP Bulider平台下对改进的自适应线谱增强算法予以实现。

Improvement and Implementation of Adaptive Line spectrum Enhancement

Aiming at the problem of difficult detection and extraction of the line spectra in the ship radiated noise, the adaptive line spectrum enhancer based on the vector hydrophone is investigated in this paper. Taking the advantage of vector hydrophone which can synchronously measure the sound pressure and vibration velocity, the conventional adaptive line spectrum enhancer has been improved as the double input structure. Due to the relativity between the sound pressure signal and vibration velocity signal, the effect of line spectrum enhancement can be enhanced. The improved algorithm is validated by the measured data and the adaptive line spectrum enhancement algorithm is implemented based on the DSP Bulider platform in Simulink.