动力定位噪声对全景扫描声呐干扰的特性分析
发布时间：2019-05-27 15:06
【摘要】：在浅海的工作环境下,船舶或海上作业平台的动力定位噪声严重地干扰全景扫描声呐的声图。目前的各种干扰抵消技术实际效果不理想,动力定位状态下其对全景扫描声呐的信号检测能力提高有限。本文提出通过收放全景扫描声呐的铠装电缆恢复被掩盖了的目标信号的方法,计算了动力定位螺旋桨噪声干扰的直达波和海底反射波到达接收阵的入射角;仿真分析了接收阵入水深度对螺旋桨噪声干扰的直达波和多途影响,以及引起的盲区方位变化情况;仿真结果表明可提高全景扫描声呐的探测能力,为全景扫描声呐设计者采取相应的信号处理算法来抑制动力定位噪声的干扰提供了依据。
[Abstract]:In the working environment of shallow sea, the dynamic positioning noise of ship or offshore operation platform seriously interferes with the sonogram of panoramic scanning Sonar. At present, the actual effect of various interference cancellation techniques is not ideal, and the signal detection ability of panoramic scanning Sonar is limited in the state of dynamic positioning. In this paper, a method is proposed to recover the masked target signal by collecting and playing the armored cable of panoramic scanning Sonar, and the incident angles of the direct wave and the reflected wave arriving at the receiving array of the noise interference of the dynamic positioning propeller are calculated. The direct wave and multi-path influence of the water intake depth of the receiving array on the noise interference of the propeller, as well as the azimuth variation of the blind area caused by the depth of the receiving array, are simulated and analyzed. The simulation results show that the detection ability of panoramic scanning Sonar can be improved, which provides a basis for panoramic scanning Sonar designers to adopt the corresponding signal processing algorithm to suppress the interference of dynamic positioning noise.
【作者单位】： 中国科学院声学研究所;中国科学院大学;
【基金】：国家自然科学基金项目(61471353)
【分类号】：U664.82;U666.7
，
本文编号：2486247
[Abstract]:In the working environment of shallow sea, the dynamic positioning noise of ship or offshore operation platform seriously interferes with the sonogram of panoramic scanning Sonar. At present, the actual effect of various interference cancellation techniques is not ideal, and the signal detection ability of panoramic scanning Sonar is limited in the state of dynamic positioning. In this paper, a method is proposed to recover the masked target signal by collecting and playing the armored cable of panoramic scanning Sonar, and the incident angles of the direct wave and the reflected wave arriving at the receiving array of the noise interference of the dynamic positioning propeller are calculated. The direct wave and multi-path influence of the water intake depth of the receiving array on the noise interference of the propeller, as well as the azimuth variation of the blind area caused by the depth of the receiving array, are simulated and analyzed. The simulation results show that the detection ability of panoramic scanning Sonar can be improved, which provides a basis for panoramic scanning Sonar designers to adopt the corresponding signal processing algorithm to suppress the interference of dynamic positioning noise.
【作者单位】： 中国科学院声学研究所;中国科学院大学;
【基金】：国家自然科学基金项目(61471353)
【分类号】：U664.82;U666.7
，
本文编号：2486247
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