| 引用本文: | 奚畅,蔡志明,袁骏.转向机动条件下利用拖船航迹的拖线阵阵形估计.[J].国防科技大学学报,2020,42(4):71-77.[点击复制] |
| XI Chang,CAI Zhiming,YUAN Jun.Estimation of towed linear array shape using tug track during ship′s course-change maneuvering[J].Journal of National University of Defense Technology,2020,42(4):71-77[点击复制] |
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| 转向机动条件下利用拖船航迹的拖线阵阵形估计 |
| 奚畅,蔡志明,袁骏 |
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(海军工程大学 电子工程学院, 湖北 武汉 430033)
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| 摘要: |
| 针对水动力模型(water-pulley模型)适用范围有限的问题,提出一种对拖船航迹进行平滑得到拖线阵声阵段运动轨迹,进而实现阵形估计的方法。通过分析缆的稳态振荡响应特性,近似认为声阵段上各点沿同一轨迹运动；设计平滑窗将拖船回转机动航迹平滑为声阵段航迹,并将其拓展应用于拖船转向机动的情况；利用平滑窗的一部分对距离拖船不足平滑窗宽度的航迹部分进行平滑得到当前拖缆段阵形,从而实现转向机动过程中全阵阵形的实时估计。仿真结果表明:若拖线阵由间隔为5 m的81个阵元构成,所提出的方法与朴素water-pulley模型相比可以使转向机动过程中的平均阵增益提高约0.8 dB,平均方位估计偏差减小约4.7°。利用仿真结果分析算法的输入敏感性,对阵形估计方法进行简化使其更易于工程实现,海试数据验证表明简化的方法可行、有效。 |
| 关键词: water-pulley模型 拖线阵 阵形估计 转向机动 航迹平滑 |
| DOI：10.11887/j.cn.202004012 |
| 投稿日期：2019-01-13 |
| 基金项目:国家自然科学基金资助项目(51679247)；湖北省自然科学基金一般面上基金资助项目(2019CFB799) |
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| Estimation of towed linear array shape using tug track during ship′s course-change maneuvering |
| XI Chang, CAI Zhiming, YUAN Jun |
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(College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, China)
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| Abstract: |
| Aiming at the problem of the limited application scope of water-pulley model, a method for smoothing the tug track to obtain the track of the sonar array and estimate the array shape was proposed. By analyzing the steady-state vibration response characteristics of the array, it is considered that each point on the sonar array moves along the same track. The smoothing window was designed to smooth the tug track into the track of sonar array during circular maneuver, and was extended to the scene of course-change maneuvering. A part of the window was used to smooth the track portion, whose distance from the tug is less than the width of the smooth window, to obtain the current cable shape, so as to estimate the shape of the whole array during the course-change maneuvering. The simulation results show that if the array consists of 81 elements spaced at 5 m, the proposed method can increase the average array gain during course-change maneuvering by about 0.8 dB and lower the average direction estimation error by about 4.7° compared with the original water-pulley model. Using the simulation results to analyze the input sensitivity of the algorithm, the proposed method was simplified to make it easier to implement. Verification using sea trial data shows that the simplified method is feasible and effective. |
| Keywords: water-pulley model towed linear array array shape estimation course-change maneuvering tug track smooth |
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