Article(id=1243896232792404167, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243896229885751465, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1007-7294.2025.08.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1740240000000, receivedDateStr=2025-02-23, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1774497572372, onlineDateStr=2026-03-26, pubDate=1755619200000, pubDateStr=2025-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774497572372, onlineIssueDateStr=2026-03-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774497572372, creator=13701087609, updateTime=1774497572372, updator=13701087609, issue=Issue{id=1243896229885751465, tenantId=1146029695717560320, journalId=1240685776644648972, year='2025', volume='29', issue='8', pageStart='1181', pageEnd='1342', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1774497571678, creator=13701087609, updateTime=1774501555614, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1243912939799949656, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243896229885751465, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243912939799949657, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243896229885751465, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1239, endPage=1249, ext={EN=ArticleExt(id=1243896233077616844, articleId=1243896232792404167, tenantId=1146029695717560320, journalId=1240685776644648972, language=EN, title=Dynamic collision avoidance trajectory planning for unmanned ships based on improved PRM algorithm and event triggering mechanism, columnId=1241023037940748650, journalTitle=Journal of Ship Mechanics, columnName=Hydrodynamics, runingTitle=null, highlight=null, articleAbstract=
The trajectory planning of unmanned ships is an important part of unmanned ships autonomous navigation. A trajectory planning method for unmanned ship dynamic collision avoidance was proposed based on improved PRM algorithm and event triggering mechanism. Firstly, PRM and A* were combined to obtain the PRM-A* algorithm, and a trajectory planning model for unmanned ships was established based on the PRM-A* algorithm. A grid map was established based on the current environmental situation, the PRM-A* algorithm was used to plan the collision avoidance path of unmanned ships, and an S-T grid map of the collision avoidance path was established. The PRM-A* algorithm was used to plan the speed of unmanned ships on the S-T grid map, thus obtaining the collision avoidance trajectory of unmanned ships at the current time. Secondly, a dynamic collision avoidance model was established for unmanned ships based on the event triggering mechanism. An unmanned ship collision risk assessment model was established based on the TCPA and DCPA of unmanned ships, based on which event triggering condition was set. When the event was triggered, the unmanned ship collision avoidance trajectory was planned based on the current time window environmental situation. Finally, simulation experiments were conducted on the trajectory planning of unmanned ships in open and restricted waters. The results show that the algorithm can effectively make an unmanned ship avoid static and moving obstacles in waters, save computational resources, and improve computational performance.
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无人船的轨迹规划是无人船自主航行的重要环节。本文基于改进PRM算法和事件触发机制提出一种无人船动态避碰的轨迹规划方法。首先,将PRM和A*结合得到PRM-A*算法,并基于PRM-A*算法建立无人船轨迹规划模型。根据当前时刻的环境态势建立栅格地图,通过PRM-A*算法规划无人船的避碰路径,并建立该避碰路径的S-T栅格图。通过PRM-A*算法对S-T栅格图规划无人船航速,从而得到当前时刻的无人船避碰轨迹。其次,基于事件触发机制建立无人船的动态避碰模型。根据无人船的TCPA和DCPA建立无人船碰撞危险度评估模型,并以此为基础设置事件触发条件;事件触发后,根据当前时间窗的环境态势规划无人船避碰轨迹。最后,分别进行开阔水域和限制水域的无人船轨迹规划仿真试验。结果显示,本算法可使无人船能有效地避开局部水域中静态障碍物和移动障碍物,并节省计算资源,提升计算性能。
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a.武汉理工大学 船海与能源动力工程学院,武汉 430063
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Unmanned ship trajectory in restricted waters Period 3, figureFileSmall=Rsv8TneR3KD/Q/4RrfJ15Q==, figureFileBig=Nas+/HIdR2uXQIpnnc5BJg==, tableContent=null), ArticleFig(id=1243896247023678249, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243896232792404167, language=CN, label=图12, caption=
限制水域时段3无人船轨迹, figureFileSmall=Rsv8TneR3KD/Q/4RrfJ15Q==, figureFileBig=Nas+/HIdR2uXQIpnnc5BJg==, tableContent=null), ArticleFig(id=1243896247111758638, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243896232792404167, language=EN, label=Fig.13, caption=
Unmanned ship trajectory in restricted waters Period 4, figureFileSmall=pyNJnV24TQhE7FbzpvC3Jw==, figureFileBig=aAiPWVvDDmtGidHlt7NsBA==, tableContent=null), ArticleFig(id=1243896247183061810, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243896232792404167, language=CN, label=图13, caption=
限制水域时段4无人船轨迹, figureFileSmall=pyNJnV24TQhE7FbzpvC3Jw==, figureFileBig=aAiPWVvDDmtGidHlt7NsBA==, tableContent=null), ArticleFig(id=1243896247300502322, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243896232792404167, language=EN, label=Tab.1, caption=
Event triggering times of dynamic collision avoidance model
, figureFileSmall=null, figureFileBig=null, tableContent=
| 航行场景 | 事件触发次数 | 时间窗数 | 减小比例 |
|---|
| 开阔水域 | 28 | 32 | 12.5% |
| 限制水域 | 19 | 32 | 40.625% |
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动态避碰模型事件触发次数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 航行场景 | 事件触发次数 | 时间窗数 | 减小比例 |
|---|
| 开阔水域 | 28 | 32 | 12.5% |
| 限制水域 | 19 | 32 | 40.625% |
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