多波束測點位置歸算橫縱搖耦合效應分析
發(fā)布時間：2019-05-21 08:48
【摘要】：多波束測點位置歸算是多波束測深數(shù)據(jù)處理的重要環(huán)節(jié),位置歸算精度的高低將直接影響測深成果質(zhì)量。針對目前多波束測點位置歸算過程中存在的橫縱搖耦合效應問題,首先,以換能器基陣坐標系統(tǒng)下測點位置歸算為例分析橫縱搖耦合效應產(chǎn)生的原因。進而,推導換能器基陣旋轉(zhuǎn)角與橫縱搖角之間的關系并在原模型的基礎上建立改進的測點位置歸算模型。最后,通過仿真實驗對原模型與改進模型的計算結(jié)果進行比對分析。結(jié)果表明:當縱搖角較小時,橫縱搖耦合效應對測深影響不明顯;當縱搖角較大時,在邊緣波束附近,原模型的測深相對誤差超過了規(guī)定限差。因此為獲取高質(zhì)量測深成果,宜采用改進模型進行位置歸算以避免橫縱搖耦合效應的影響。研究結(jié)果為進一步改善多波束測點位置歸算精度提供一定參考。
[Abstract]:Multi-beam point location reduction is an important link in multi-beam bathymetric data processing, and the accuracy of position reduction will directly affect the quality of bathymetric results. In order to solve the problem of rolling coupling effect in the process of position reduction of multi-beam measuring points, firstly, the causes of transverse and pitching coupling effect are analyzed by taking the position reduction of measuring points in transducer array coordinate system as an example. Furthermore, the relationship between the rotation angle and the rolling angle of the transducer array is derived, and an improved position reduction model of the measuring point is established on the basis of the original model. Finally, the calculation results of the original model and the improved model are compared and analyzed by simulation experiments. The results show that when the pitching angle is small, the effect of pitching coupling on bathymetric is not obvious, and when the pitching angle is large, the relative error of bathymetric of the original model exceeds the specified limit difference near the edge beam. Therefore, in order to obtain high quality bathymetric results, the improved model should be used to calculate the position in order to avoid the influence of rolling coupling effect. The research results provide some reference for further improving the accuracy of position reduction of multi-beam point measurement.
【作者單位】： 海軍大連艦艇學院海洋測繪系;91650部隊;
【基金】：國家自然科學基金項目(41576105、41074002)
【分類號】：P229
本文編號：2481979
[Abstract]:Multi-beam point location reduction is an important link in multi-beam bathymetric data processing, and the accuracy of position reduction will directly affect the quality of bathymetric results. In order to solve the problem of rolling coupling effect in the process of position reduction of multi-beam measuring points, firstly, the causes of transverse and pitching coupling effect are analyzed by taking the position reduction of measuring points in transducer array coordinate system as an example. Furthermore, the relationship between the rotation angle and the rolling angle of the transducer array is derived, and an improved position reduction model of the measuring point is established on the basis of the original model. Finally, the calculation results of the original model and the improved model are compared and analyzed by simulation experiments. The results show that when the pitching angle is small, the effect of pitching coupling on bathymetric is not obvious, and when the pitching angle is large, the relative error of bathymetric of the original model exceeds the specified limit difference near the edge beam. Therefore, in order to obtain high quality bathymetric results, the improved model should be used to calculate the position in order to avoid the influence of rolling coupling effect. The research results provide some reference for further improving the accuracy of position reduction of multi-beam point measurement.
【作者單位】： 海軍大連艦艇學院海洋測繪系;91650部隊;
【基金】：國家自然科學基金項目(41576105、41074002)
【分類號】：P229
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，本文編號：2481979
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