| 深海季节性环境变化对半会聚区尺度水面声定位影响分析 |
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| 引用本文： | 张旭,李智生,邱仁贵,董楠.深海季节性环境变化对半会聚区尺度水面声定位影响分析[J].海洋学报,2020,42(3):59-71. |
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| 作者姓名： | 张旭 李智生 邱仁贵 董楠 |
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| 作者单位： | 1.中国人民解放军91550部队，辽宁 大连 116023 |
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| 基金项目： | 国家自然科学基金项目（61701504，61971424）。 |
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| 摘 要： | 针对深海声定位受海洋环境变化影响明显、需考虑测量系统的环境适应性和宽容性设计问题，提出一种评估海水环境变化对定位性能影响的仿真分析方法，将声场计算、误差传播与交会解算联合建模，以西太平洋中纬度海域夏季和冬季环境为代表性场景讨论了季节性环境变化对定位性能的影响方式和影响程度。仿真结果表明，当接收器位于海洋近表层时，在夏季和冬季呈现出两种不同的声信道样式，夏季季节性温跃层影响下的定位精度较差，冬季表面波导影响下的定位精度相对较好，两者均方根误差(RMSE)相差超过50 m；当接收器位于海洋中上层时，直达波有效作用范围的季节性变化引起定位性能差异，冬季定位精度优于夏季，两者RMSE相差15～20 m；当接收器位于海洋近底层时，利用可靠声路径定位精度较高，定位性能季节性变化不明显。研究认为，海水的季节性环境变化能够改变半会聚区尺度水面声定位的声信道特性以及到达声信息、误差传播、交会求解等测量因素，进而对接收深度位于海洋上层的声定位性能产生明显影响。
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| 关 键 词： | 深海 季节性变化 环境影响 水声定位 会聚区 |
| 收稿时间： | 2019/3/11 0:00:00 |
| 修稿时间： | 2020/1/3 0:00:00 |
Effects of seasonal environmental variation on surface acoustic localization in the half convergence zone area of deep sea |
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| Zhang Xu,Li Zhisheng,Qiu Rengui and Dong Nan.Effects of seasonal environmental variation on surface acoustic localization in the half convergence zone area of deep sea[J].Acta Oceanologica Sinica (in Chinese),2020,42(3):59-71. |
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| Authors: | Zhang Xu Li Zhisheng Qiu Rengui and Dong Nan |
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| Institution: | 1.Unit 91550 of PLA, Dalian 116023, China2.Unit 91650 of PLA, Guangzhou 510320, China |
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| Abstract: | To recognize the environmental effects on underwater acoustic localization in deep sea and improve the measurement system performance against environmental variations, an simulation method for localization performance evaluation under different oceanographic conditions was presented, in which the sound filed calculation, error propagation and crossing solution were integrated by modelling, and the effects of seasonal environmental variation on localization performance were discussed in the case of Western Pacific. According to simulation results, when the receiving depth was near the surface, the sound channel showed different models in summer and winter, such that the accuracy was worse in summer influnced by seasonal thermocline and better in winter influnced by surface duct, the difference of root mean square error (RMSE) beyond 50 m; when the receiving depth was in the upper ocean, the localization performance had an obviously seasonal change caused by the active range of direct wave, and the accuracy was better in winter than that in summer, the difference of RMSE was 15-20 m; when the receiving depth was near the bottom, the better accuracy was obtained using reliable acoustic path, and the localization performance had little change with season. This work indicates that the seasonal environmental variation induces differences in the sound channel as well as the arrival acoustic information, the error propagation and crossing solution for the localization in the half convergence zone area of deep sea, then exert significant effects on localization performance as the receiving depth in the upper ocean. |
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| Keywords: | deep sea seasonal variation environmental effect underwater acoustic localization convergence zone |
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