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Matched field processing by using a short vertical array: experimental results in deep water

机译:使用短垂直阵列进行匹配场处理:深水中的实验结果

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The detection and localization of a vertical line array against a submerged target, including their hardware implementation technology, have been paid more and more attentions since 1980s. In this paper, matched field processing for moving source by using short vertical array in deep water is presented. During the joint China-Russia Pacific Ocean experiment in October 1995, the 100 m-deep source was towed by one ship at a speed of 6 knots, and transmitted pulsed CW signals of 112 Hz and 406 Hz. The data receiving system was a satellite-buoy underwater measurement system with a 16-element vertical line array. The 16-element vertical array approximately spanned small part of the water column from 200 to 230 m, and the water depth is about 5000 m. The experiment showed that the receiving system could work reliably and stable for a long time, and the data was collected with very good quality. MFP methods are a generalized form of beam-forming, which incorporates the propagation physics directly into the array processing. In this paper, the Bartlett processor is used for the matched-field source localization. The forward model is WKBZ normal mode approach, which is based on the generalized phase integration approximation of eigen-functions. Under the same sound speed structure, source frequency and accuracy, the WKBZ normal mode model has the advantage of less computational time. The distances between the satellite-buoy system and the ship are determined by the satellite GPS system. The matched-field localization results show that the estimated distances between the source and the satellite-buoy system are in good agreement with GPS ranging, and the source is successfully localized at ranges up to 64 km. In addition to the source localization, the measured TL data are in good agreement with the calculated ones based on the WKBZ model.
机译:自1980年代以来,针对水下目标(包括其硬件实现技术)的垂直线阵列的检测和定位已引起越来越多的关注。本文提出了一种利用短垂直阵列在深水中对运动源进行匹配场处理的方法。在1995年10月的中俄太平洋联合实验中,一艘船以6节的速度拖曳了深达100 m的震源,并发射了112 Hz和406 Hz的脉冲连续波信号。数据接收系统是具有16个元素的垂直线阵列的卫星浮标水下测量系统。 16个元素的垂直阵列大约跨过水柱的一小部分,从200到230 m,水深约为5000 m。实验表明,该接收系统可以长期稳定可靠地工作,并且采集的数据质量很好。 MFP方法是波束形成的一种通用形式,它将传播物理学直接整合到阵列处理中。在本文中,Bartlett处理器用于匹配场源定位。正向模型是WKBZ标准模式方法,该方法基于本征函数的广义相位积分近似。在相同的声速结构,源频率和精度下,WKBZ标准模式模型具有计算时间更少的优点。卫星浮标系统与船舶之间的距离由卫星GPS系统确定。匹配场定位结果表明,震源与卫星浮标系统之间的估计距离与GPS测距非常吻合,并且震源成功地定位在64 km的范围内。除了源定位之外,测得的TL数据还与基于WKBZ模型计算出的TL数据非常吻合。

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