Article(id=1204385896960340531, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1204385894045299206, articleNumber=null, orderNo=null, doi=10.19620/j.cnki.1000-3703.20220393, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=null, receivedDateStr=null, revisedDate=1658246400000, revisedDateStr=2022-07-20, acceptedDate=null, acceptedDateStr=null, onlineDate=1765077574242, onlineDateStr=2025-12-07, pubDate=1690128000000, pubDateStr=2023-07-24, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1765077574242, onlineIssueDateStr=2025-12-07, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1765077574242, creator=13701087609, updateTime=1765077574242, updator=13701087609, issue=Issue{id=1204385894045299206, tenantId=1146029695717560320, journalId=1189621681917173762, year='2023', volume='', issue='7', 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=1765077573547, creator=13701087609, updateTime=1765079205010, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1204392736964194804, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1204385894045299206, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1204392736964194805, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1204385894045299206, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=54, endPage=62, ext={EN=ArticleExt(id=1204385897228775999, articleId=1204385896960340531, tenantId=1146029695717560320, journalId=1189621681917173762, language=EN, title=Research on Driving Risk Field Modeling and Obstacle Avoidance Control Considering Coefficient of Road Adhesion, columnId=1204385894989013993, journalTitle=Automobile Technology, columnName=Special Topic on Vehicle Trajectory Prediction and Path Tracking, runingTitle=null, highlight=null, articleAbstract=
For the active obstacle avoidance of vehicle under different road conditions, this paper proposed an obstacle avoidance path planning method in driving risk field considering road adhesion coefficient. Firstly, the driving risk fields including road boundary risk field, target gravitational field and obstacle risk field were established. The road adhesion coefficient was estimated in real time based on the volumetric Kalman filter algorithm, and the driving risk field function considering the road adhesion coefficient was derived with negative gradient derivative, and the obstacle avoidance path with the lowest risk was obtained. Then, the obstacle avoidance reference path satisfying the vehicle constraints was obtained by 5-degree polynomial fitting optimization. Finally, the model predictive control algorithm was utilized to track the obstacle avoidance path. The simulation results show that at the same speed, the smaller the road adhesion coefficient, the smaller the lateral acceleration is, the smaller the standard deviation of the lateral acceleration is, and the more stable the obstacle avoidance effect will be.
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针对车辆在不同路面条件下的主动避障问题,提出一种考虑路面附着系数的行车风险场避障路径规划方法。首先,建立了包含道路边界风险场、目标引力场和障碍物风险场的行车风险场;基于容积卡尔曼滤波算法实时估算路面附着系数,并对考虑路面附着系数的行车风险场函数进行负梯度求导,得到风险值下降最快的避障路径;然后,采用5次多项式拟合优化得到满足车辆约束的避障参考路径;最后,采用模型预测控制算法跟踪避障路径。仿真结果表明:在相同车速下,路面附着系数越小,避障时的横向加速度越小,横向加速度的标准差越小,避障效果越平顺。
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| 参数 | 取值 |
| 车辆质量/kg | 1 723 |
| 质心到前轴中心距离/m | 1.232 |
| 质心到后轴中心距离/m | 1.468 |
| 车辆绕z轴转动惯量/kg·m2 | 4 175 |
| 前轮侧偏刚度/N·rad-1 | 66 900 |
| 后轮侧偏刚度/N·rad-1 | 62 700 |
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车辆参数
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| 参数 | 取值 |
| 车辆质量/kg | 1 723 |
| 质心到前轴中心距离/m | 1.232 |
| 质心到后轴中心距离/m | 1.468 |
| 车辆绕z轴转动惯量/kg·m2 | 4 175 |
| 前轮侧偏刚度/N·rad-1 | 66 900 |
| 后轮侧偏刚度/N·rad-1 | 62 700 |
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| 参数 | 取值 |
| 道路左边界Lleft/m | 16 |
| 道路右边界Lright/m | 1 |
| 道路边界风险场调节系数λr | 0.1 |
| 路面附着系数调节系数βμ | 0.4 |
| 目标引力场调节系数αr | 0.003 |
| 障碍物风险场调节系数βU | 30 |
| 相对速度调节系数βv | 2 |
| 障碍车外形尺寸调节系数βobs | 1 |
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风险场参数
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| 参数 | 取值 |
| 道路左边界Lleft/m | 16 |
| 道路右边界Lright/m | 1 |
| 道路边界风险场调节系数λr | 0.1 |
| 路面附着系数调节系数βμ | 0.4 |
| 目标引力场调节系数αr | 0.003 |
| 障碍物风险场调节系数βU | 30 |
| 相对速度调节系数βv | 2 |
| 障碍车外形尺寸调节系数βobs | 1 |
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| 参数 | 取值 |
| 采样时间/s | 0.02 |
| 预测时域Np | 30 |
| 控制时域Nc | 10 |
| 跟踪效果调节矩阵Q | [2 000 0;0 10 000] |
| 控制量变化调节矩阵R | [5×105] |
| 权重系数 | 10 |
| 松弛因子 | 10 000 |
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模型预测控制器参数
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| 参数 | 取值 |
| 采样时间/s | 0.02 |
| 预测时域Np | 30 |
| 控制时域Nc | 10 |
| 跟踪效果调节矩阵Q | [2 000 0;0 10 000] |
| 控制量变化调节矩阵R | [5×105] |
| 权重系数 | 10 |
| 松弛因子 | 10 000 |
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