| 王旭艳, 孙 超, 刘 兵 |
(西北工业大学 声学工程研究所，陕西 西安710072) |
 摘要：多接收元合成孔径声纳成像是当前研究的热点问题，偏航和侧摆是影响多接收元合成孔径声纳成像质量的关键因素。建立了多接收元合成孔径声纳偏航和侧摆运动误差的几何模型，提出了一种基于图像估计偏航和侧摆的新方法。该方法允许声纳系统以满足空间采样理论的最大速度运行，利用强点目标的每个脉冲回波数据的成像结果估计偏航和侧摆。计算机仿真结果表明新算法有效地估计出了偏航和侧摆，提高了成像质量，明确地确定出了目标的位置。 |
| 关键词：多接收元合成孔径声纳；偏航； 侧摆；强点目标 |
| 中图分类号：TN911.7 文献标识码：A 文章编号：1000-8829(2008)05-0025-03 |
| A Motion Compensation Method Based on Image for the Multi-Hydrophone SAS |
| WANG Xu-yan, SUN Chao， LIU Bing |
| (Institute of Acoustic Engineering,Northwestern Polytechnical University,Xi’an 710072,China) |
| Abstract：The image reconstruction of a multi-hydrophone SAS (synthetic aperture sonar) has been an active research topic at present.Yaw and sway are the key factors which result in distorted image and loss of resolution.Yaw and sway models are constructed firstly,and then a new method for estimating yaw and sway based on image is proposed.With this method,the multi-hydrophone SAS may travel at the maximum allowable speed as determined by the spatial sampling theorem,and the yaw and sway are estimated by the image from each ping echo of the strong point scatterer.Some simulation results using the proposed algorithm are given.It can be seen from these results that the proposed algorithm estimates the yaw and sway effectively and the image quality is improved,so the target is oriented exactly. |
| Key words：a multi-hydrophone SAS;yaw;sway;strong point scatterer |
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