| 基于FFT的海底地形二维匹配技术 |
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| 引用本文： | 于家城,陈家斌,贺鹏,宋春雷.基于FFT的海底地形二维匹配技术[J].系统仿真学报,2008,20(21):5795-5797,5832. |
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| 作者姓名： | 于家城 陈家斌 贺鹏 宋春雷 |
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| 作者单位： | 华北科技学院电子信息工程系，北京理工大学信息科学技术学院自动控制系，上海工程技术大学城市轨道交通学院 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 海底地图匹配技术是水下地形辅助导航的核心技术之一,它主要用来提高水下载体(AUV3的定位精度,提出了基于付立叶变换的海底地形二维匹配算法(FFT算法),通过FFT变换将频域中幅值引入匹配,设计了位置匹配圆板进行实时图位置匹配与方向搜索模板进行方向搜索.应用实际海图原始数据进行仿真,结果表明,该算法能够同时匹配出位置信息和方向信息,具有较高的匹配精度和抗差特性.
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| 关 键 词： | 地形匹配 快速付立叶变换 位置匹配圆板 参考地图 |
Seafloor Terrain 2-dimensional Matching Based on Fast Fourier Transform |
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| YU Jia-cheng,CHEN Jia-bin,HE Peng,SONG Chun-lei.Seafloor Terrain 2-dimensional Matching Based on Fast Fourier Transform[J].Journal of System Simulation,2008,20(21):5795-5797,5832. |
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| Authors: | YU Jia-cheng CHEN Jia-bin HE Peng SONG Chun-lei |
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| Abstract: | Seafloor terrain matching is applied to increase the localization accuracy for autonomous underwater vehicles(AUV).A seafloor terrain 2-dimensional matching algorithm in terms of Fast Fourier Transform(FFT algorithm) was proposed.By way of FFT,the amplitude was used to perform terrain matching.A position matching circle model and an orientation search model were designed to get the position and direction of realtime map within reference map.The algorithm was verified by using practical water depth data of certain seafloor.Simulation results show that it can obtain information about position and direction of realtime map respectively with higher precision and somewhat robusticity. |
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| Keywords: | terrain matching FFT circular position matching model RDM |
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