欢迎来到天天文库
浏览记录
ID:55316829
大小:368.67 KB
页数:5页
时间:2020-05-14
《顾及姿态角的多波束声线精确跟踪方法.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第36卷第1期哈尔滨工程大学学报Vol_36No.12015年1月JournalofHarbinEngineeringUniversityJan.2015顾及姿态角的多波束声线精确跟踪方法何林帮,赵建虎,张红梅,王晓,严俊(1.武汉大学测绘学院,湖北武汉430079;2.武汉大学动力与机械学院自动化系,湖北武汉430072)摘要:传统声线跟踪方法中波束初始入射角的计算采用理想状态下多波束提供的波束分配角,未顾及或未完全顾及船体姿态角的影响进而导致波束海底投射点归位计算带人显著性误差问题。针对此问提出了一种顾及姿态角影响的声线精
2、确跟踪方法,该方法通过研究船体姿态影响下的多波束换能器状态,给出了波束声线实际传播面,并推导出了传播面内波束声线的实际初始入射角,结合声速剖面,最终根据常梯度声线跟踪得到了准确的测深点三维坐标。通过实验比较传统声线跟踪方法和精确声线跟踪方法计算波束在海底投射点的坐标精度,验证了精确声线跟踪方法克服了传统声线跟踪的不足,显著地提高了多波束测深的精度。关键词:多波束测深系统;波束脚印;初始入射角;姿态角;常梯度声线跟踪doi:10.3969/j.issn.1006-7043.201310060网络出版地址:http://www.c
3、nki.net/kcms/doi/10.3969/j.issn.1006—7043.201310060.html中图分类号:P229文献标志码:A文章编号:1006—7043(2015)ol一0046—05AprecisemultibeamsoundraytrackingmethodtakingintoaccounttheattitudeangleHELinbang,ZHAOJianhu,ZHANGHongmei,WANGXiao,YANJun(1.SchoolofGeodesyandGeomatics,WuhanUniver
4、sity,Wuhan430079,China;2.SchoolofPowerandMechanicalEngineering,WuhanUniversity,Wuhan430072,China)Abstract:TheassignedbeaminitialincidentangleprovidedbyMBS(multibeambathymetrysystem)isadoptedbythetraditionalsoundraytrackingmethodregardingthevesselinthehorizontalstatu
5、s,whichignoresordoesnotconsidercompletelytheimpactsofvesselattitudeangles,andleadobviouserrortothedeterminationofbeamfoot—printposition.Aimingattheproblem.Inordertoreducethiskindofsignificanterror,anaccuratemethodforsoundraytracking,whichconsidersvesselattitudeangle
6、sareputforwardinthispaper.Intheproposedmethod,theactu-alpropagationprofileisgivenbymeansofstudyingtheactualstatusofMBStransducerimpactedbyvesselattitudeandtheactualinitialincidenceangleofMBSbeamisderivedbythecalculationmode1.Byintegratingthesoundve—locityprofile,the
7、accurate、positioningofbeamfootprintonseabedisachievedbyconstant—gradientsoundraytrack-ingmethod.Bycomparingthebeamfootprintcoordinateprecisioncalculatedbytraditionalsoundraytrackingmeth-odandtheprecisemethodofsoundraytrackinginexperiment,aconclusioncanbedrawnthatthe
8、precisemethodofsoundraytrackingcanovercomethedeficiencyofthetraditionalsoundraytracking.Thisimprovessignificantlytheprecisionformulti—beam
此文档下载收益归作者所有