Article(id=1210314383079633918, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1210314382282716156, articleNumber=null, orderNo=null, doi=10.19620/j.cnki.1000-3703.20230278, 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=1766491035480, onlineDateStr=2025-12-23, pubDate=1711209600000, pubDateStr=2024-03-24, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766491035480, onlineIssueDateStr=2025-12-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766491035480, creator=13701087609, updateTime=1766491035480, 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=47, endPage=55, ext={EN=ArticleExt(id=1210314383293542401, articleId=1210314383079633918, tenantId=1146029695717560320, journalId=1189621681917173762, language=EN, title=Optimization Design of Lateral LQR Controller for Intelligent Vehicle Based on GA-PSO, columnId=null, journalTitle=Automobile Technology, columnName=null, runingTitle=null, highlight=null, articleAbstract=
In order to solve the problem of low control accuracy and low parameter tuning efficiency caused by difficulty in selecting coefficient matrix Q and R of Linear Quadratic Regulator (LQR) in lateral control of intelligent vehicle, this paper proposed an optimization method of genetic particle mixing (Genetic Algorithm -Particle Swarm Optimization, GA-PSO). A lateral LQR controller and a feed-forward controller were designed based on the two-degree-of-freedom model of the vehicle. The coefficient matrix was optimized using the LQR controller’s own energy loss function as the cost function. The algorithm optimization results of GA-PSO and PSO were compared. The CarSim/Simulink co-simulation shows that the GA-PSO optimized controller improves the tracking accuracy and computing efficiency by 47.06% and 63.54%, respectively, and the optimized controller has strong robustness.
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针对线性二次型调节器(LQR)在智能汽车横向控制中,系数矩阵Q和R选取困难导致的控制精度低和参数整定效率低的问题,提出了一种遗传粒子混合优化(GA-PSO)方法。基于车辆二自由度模型设计了横向LQR控制器和前馈控制器,以该模型下控制器自身能量损失函数作为代价函数对系数矩阵进行优化,并对比了GA-PSO和粒子群优化(PSO)算法的优化效果。CarSim/Simulink联合仿真结果表明,经GA-PSO算法优化后的控制器跟踪精度和计算效率分别提高了47.06%和63.54%,且优化后的控制器具有较强的鲁棒性。
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| 参数 | 取值 |
| 整车质量m/kg | 1 412 |
| 质心到前轴的距离a/m | 1.015 |
| 质心到后轴的距离b/m | 1.895 |
| 前轮侧偏刚度Cαf/N·rad-1 | -110 000 |
| 后轮侧偏刚度Cαr/N·rad-1 | -110 000 |
| 绕Z轴的转动惯量I/kg·m2 | 1 536.7 |
| 轮胎型号 | 215/55 R17 |
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仿真车辆参数
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| 参数 | 取值 |
| 整车质量m/kg | 1 412 |
| 质心到前轴的距离a/m | 1.015 |
| 质心到后轴的距离b/m | 1.895 |
| 前轮侧偏刚度Cαf/N·rad-1 | -110 000 |
| 后轮侧偏刚度Cαr/N·rad-1 | -110 000 |
| 绕Z轴的转动惯量I/kg·m2 | 1 536.7 |
| 轮胎型号 | 215/55 R17 |
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| 算法 | 单次最大最优适应度 | 单次最小最优适应度 | 平均最优适应度 | 平均CPU运行时间/s |
| PSO | 436.517 305 1 | 74.380 300 5 | 260.598 791 1 | 936.923 545 |
| GA-PSO | 448.094 762 0 | 69.194 492 4 | 237.922 362 8 | 341.614 805 |
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算法运行结果
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| 算法 | 单次最大最优适应度 | 单次最小最优适应度 | 平均最优适应度 | 平均CPU运行时间/s |
| PSO | 436.517 305 1 | 74.380 300 5 | 260.598 791 1 | 936.923 545 |
| GA-PSO | 448.094 762 0 | 69.194 492 4 | 237.922 362 8 | 341.614 805 |
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