| 相关测速声呐底混响时空相关函数与载体俯仰角的关系 |
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| 引用本文： | 李运升, 闫善勇, 王长红. 相关测速声呐底混响时空相关函数与载体俯仰角的关系[J]. 声学学报, 2017, 42(6): 652-660. DOI: 10.15949/j.cnki.0371-0025.2017.06.002 |
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| 作者姓名： | 李运升 闫善勇 王长红 |
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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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| 摘 要： | 由于载体在运动过程中存在姿态的变化,不考虑载体姿态的理论相关函数会影响相关声呐的测速精确度。考虑载体俯仰角对发射信号海底照射区域的影响,引入不同权重的多阶贝塞尔函数,得到改进后的理论相关函数。同时,根据相关测速声呐发射参数,给出了基于FOM模型的海底回波仿真。仿真结果表明,改进的理论相关函数将相关声呐的测速误差降至1%以下。载体的俯仰角对时空相关函数产生影响。考虑载体俯仰角的理论相关函数更贴近实际情况,与仿真结果的相关系数吻合的较好,能够更加准确的估计载体速度。
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| 关 键 词： | 相关测速声呐 时空相关函数 载体俯仰角 模型改进 |
| 收稿时间： | 2016-10-17 |
| 修稿时间： | 2017-08-16 |
The relationship between sea-bottom reverberation spatial-temporal correlation function of correlation sonar for velocity measurement with pitch of vessels |
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| LI Yunsheng, YAN Shanyong, WANG Zhanghong. The relationship between sea-bottom reverberation spatial-temporal correlation function of correlation sonar for velocity measurement with pitch of vessels[J]. ACTA ACUSTICA, 2017, 42(6): 652-660. DOI: 10.15949/j.cnki.0371-0025.2017.06.002 |
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| Authors: | LI Yunsheng YAN Shanyong WANG Zhanghong |
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| Affiliation: | 1. Institute of Acoustics, Chinese Academy of Sciences Beijing 100190;2. University of Chinese Academy of Sciences Beijing 100049;3. Beijing Engineering Technology Research, Center of Ocean Acoustic Equipment Beijing 100190 |
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| Abstract: | As the attitude of the vessel keeps changing, if the attitude is not considered in the theoretical correlation function, it will have a bad influence on the accuracy of the velocity measurement. By considering the changes of the irradiation area of the signal on the bottom of the sea induced by the tilt of the vessel and inducing multi-order Bessel functions into the theoretical correlation function, the improved theoretical correlation function can be obtained.Meanwhile, the results of simulation, which is based on the model of FOM that is chosen based on the parameter of correlation sonar, shows that the improved theoretical correlation function reduces the error of the correlation sonar to less than 1%. Pitch of vessels can influence spatial-temporal correlation function. The theoretical correlation function considering pitch of vessels is closer to the real circumstance,and has good agreement with the correlation coefficients of the simulation results, so it can be used to realize the velocity measurement with higher accuracy. |
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| Keywords: | Correlation sonar temporal-spatial correlation function pitch of vessels model improvement |
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