【作者】 魏袁媛； 罗建； 杨松； 鲁康； 胡侯锟；

【Author】 WEI Yuanyuan;LUO Jian;YANG Song;LU Kang;HU Houkun;School of Marine Science and Technology, Northwestern Polytechnical University;

【机构】 西北工业大学；

【摘要】 分析了舰船辐射噪声的特点,对舰船辐射噪声源的连续谱、线谱进行了仿真建模。在研究固定时延产生的基础上,对运动声源在固定阵元接收的时域波形进行了建模重构。本文通过构造一个时变时延的系统,在目标运动通过接收点的过程中连续调节系统的时延,逐点滑动计算时变时延系统的输出,重构由于相对运动引起的时变的时间压缩和扩展。实现对运动目标包含宽带时变时延、多普勒频移等特征的时域波形精确重构。更多还原

【Abstract】 Analyze and study the radiated noise of ships, and simulate and model its continuum and line spectrum.And based on the accurate time delay generated by the fixed time delay, the moving sound source is reconstructed at the receiving place of the array element.This paper adopts the algorithm of time-varying delay system,by adjusting the time delay,calculation of point-by-point sliding time-varying time compression and expansion due to relative motion.High-precision realization of salient features such as broadband time delay, and reconstruction of the model received by the sound source sequence at the array element.更多还原