| 利用宽带声场干涉结构特性对移动船只距离的连续估计 |
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| 引用本文： | 任群言,朴胜春,郭圣明,马力,廖天俊.利用宽带声场干涉结构特性对移动船只距离的连续估计[J].声学学报,2018,43(2):163-168. |
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| 作者姓名： | 任群言 朴胜春 郭圣明 马力 廖天俊 |
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| 作者单位： | 1. 中国科学院声学研究所 北京 100190; |
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| 基金项目： | 国家自然科学基金项目(11604360)国家自然科学基金项目(71401167)资助中国科学院率先行动“百人计划”青年俊才项目 |
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| 摘 要： | 浅海移动船只的宽带辐射声场在距离-频率上通常表现为有规则的干涉条纹结构,这些条纹的特性(数目和斜率)可用波导不变量理论来表征并已被用于多种水声反演问题中,如沉积层声学参数反演和宽带声源距离的估计。基于波导不变量理论和干涉条纹的结构特性,利用扩展卡尔曼滤波器分析移动船只LOFAR图中干涉条纹的距离-频率特征可对其距离进行连续估计。该方法不需要海洋环境的信息和前向拷贝声场计算,具有较高的计算效率。海试数据处理结果和GPS数据计算结果比较一致,证实了本方法的准确性。试验数据处理同样证实该方法对初始距离的选择有着较高的稳健性。
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| 关 键 词： | 声源定位 航船噪声 宽带干涉结构 卡尔曼滤波 |
| 收稿时间： | 2017-03-19 |
A broadband interference structure-based algorithm to continuously estimate the range of a moving ship |
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| Affiliation: | 1. Institute of Acoustics, Chinese Academy of Sciences Beijing 100190;2. Key Laboratory of Underwater Acoustics Environment, Chinese Academy of Sciences Beijing 100190;3. Acoustic Science and Technology Laboratory, Harbin Engineering University Harbin 150001;4. State Key Laboratory of Complex System Simulation, Beijing Institute of System Engineering Beijing 100101 |
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| Abstract: | In shallow waters, regular striations can be observed from the broad-band range-frequency spectrogram radiated by a moving ship, whose structure can be interpreted by the waveguide invariant theory and has been applied for sediment geoacoustic inversion and source ranging, etc. We present an algorithm to sequentially estimate the source range by observing the striation geometrical characteristics with an extended Kalman filter. This approach is based on the waveguide invariant theory and has the advantage of no requirement of a prior environmental information and forward sound field calculation. The at-sea ship noise data is tested, and the results are in high agreement with GPS data, besides, this approach is also demonstrated to be robust to initial state values. |
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