Article(id=1210314383402594306, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1210314382282716156, articleNumber=null, orderNo=null, doi=10.19620/j.cnki.1000-3703.20230346, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=null, receivedDateStr=null, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1766491035557, onlineDateStr=2025-12-23, pubDate=1711209600000, pubDateStr=2024-03-24, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766491035557, onlineIssueDateStr=2025-12-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766491035557, creator=13701087609, updateTime=1766491035557, updator=13701087609, issue=Issue{id=1210314382282716156, tenantId=1146029695717560320, journalId=1189621681917173762, year='2024', volume='', issue='3', pageStart='1', pageEnd='62', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766491035290, creator=13701087609, updateTime=1766493673751, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1210325448853156641, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1210314382282716156, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1210325448853156642, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1210314382282716156, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=31, endPage=36, ext={EN=ArticleExt(id=1210314383608115206, articleId=1210314383402594306, tenantId=1146029695717560320, journalId=1189621681917173762, language=EN, title=The Global Path Planning Algorithm Based on Optimization RRT Algorithm, columnId=null, journalTitle=Automobile Technology, columnName=null, runingTitle=null, highlight=null, articleAbstract=
In order to improve the shortcomings of poor smoothness and potential collision in traditional Rapidly-exploring Random Tree (RRT) algorithm for global path planning, the paper proposed a dual-optimization RRT algorithm. Based on the traditional RRT algorithm, an adaptive target bias strategy was introduced to shorten the sampling time, and an angle-constrained sampling strategy was introduced to adapt to the vehicle’s maximum steering angle. After the initial path was obtained, a binary optimization function (reducing path curvature and avoiding obstacles) was established and used as a basis for gradient descent secondary optimization, generating a path that can be driven by vehicles with good smoothness and low collision probability, which was then simulated and verified. The results show that compared with RRT algorithm, RRT-Connect algorithm and RRT* algorithm, the optimized RRT algorithm reduces average curvature by 38.1%, 36.4% and 24.7%, respectively; while reducing curvature variance by 38.4%, 38.4% and 27.2%, respectively.
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*, columnId=0, journalTitle=汽车技术, columnName=, runingTitle=null, highlight=null, articleAbstract=为了改善传统快速搜索随机树(RRT)算法在全局路径规划中存在的平滑度差、具有潜在碰撞性等问题,提出了一种双重优化的RRT算法。在传统RRT算法基础上,引入自适应目标偏向策略以缩短采样时间,引入角度约束采样策略以适应车辆极限转角。得到初始路径后,建立二项优化函数(即降低路径曲率和远离障碍物),并将其作为基点进行梯度下降二次优化,生成可供车辆行驶、平滑性良好且碰撞概率低的路径,并进行仿真验证。结果表明:优化RRT算法相比于传统RRT算法、RRT-Connect算法和RRT*算法,平均曲率分别降低了38.1%、36.4%和24.7%,曲率均方差分别降低了38.4%、38.4%和27.2%。, correspAuthors=null, authorNote=null, correspAuthorsNote=
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1 Chang’an University, Xi’an 710064), AuthorCompanyExt(id=1210325043029086299, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1210314383402594306, companyId=1210325042995531865, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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| 方法 | 平均曲率 /m-1 | 平均时间/s | 曲率均方差/m-1 | 平均节点数量/个 |
| RRT | 0.015 | 0.63 | 0.013 | 350 |
| RRT-Connect | 0.014 | 0.34 | 0.013 | 300 |
| RRT* | 0.012 | 0.38 | 0.011 | 210 |
| 本文算法 | 0.009 | 0.19 | 0.008 | 180 |
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仿真验证数据
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法 | 平均曲率 /m-1 | 平均时间/s | 曲率均方差/m-1 | 平均节点数量/个 |
| RRT | 0.015 | 0.63 | 0.013 | 350 |
| RRT-Connect | 0.014 | 0.34 | 0.013 | 300 |
| RRT* | 0.012 | 0.38 | 0.011 | 210 |
| 本文算法 | 0.009 | 0.19 | 0.008 | 180 |
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