Article(id=1200066384660099410, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1200066378339288007, articleNumber=null, orderNo=null, doi=10.20104/j.cnki.1674-6546.20230053, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=1676908800000, revisedDateStr=2023-02-21, acceptedDate=null, acceptedDateStr=null, onlineDate=1764047722258, onlineDateStr=2025-11-25, pubDate=1699977600000, pubDateStr=2023-11-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764047722258, onlineIssueDateStr=2025-11-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764047722258, creator=13701087609, updateTime=1764047722258, updator=13701087609, issue=Issue{id=1200066378339288007, tenantId=1146029695717560320, journalId=1189918454225211397, year='2023', volume='', issue='11', pageStart='1', pageEnd='48', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1764047720751, creator=13701087609, updateTime=1764048276180, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200068708044472512, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1200066378339288007, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200068708044472513, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1200066378339288007, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=12, endPage=18, ext={EN=ArticleExt(id=1200066385964527973, articleId=1200066384660099410, tenantId=1146029695717560320, journalId=1189918454225211397, language=EN, title=SOC Estimation of Lithium Battery Based on Improved AUKF Algorithm, columnId=null, journalTitle=Automotive Engineer, columnName=null, runingTitle=null, highlight=null, articleAbstract=
In view of the problem that the variable window Adaptive Unscented Kalman Filter (AUKF) algorithm has a large mutation when the window changes, and the window sequence data decreases sharply, resulting in the increase of error, stability and accuracy decline in state estimation, this paper uses the Forgetting Factor Recursive Least Square (FFRLS) algorithm to identify parameters based on the second-order RC equivalent circuit model, combined with the improved variable window AUKF algorithm to estimate the State of Charge (SOC) of lithium battery, it is verified by the Urban Dynamometer Driving Schedule (UDDS) cycle test, and compared with Unscented Kalman Filter (UKF), AUKF and variable window AUKF algorithms. The test results show that the improved AUKF algorithm can control the average error within 0.38%, with higher accuracy and convergence.
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针对变窗口自适应无迹卡尔曼滤波(AUKF)算法在窗口改变时窗口长度发生突变,窗口序列数据急剧减少,导致状态估计误差增大,稳定性和精确度下降的问题,基于二阶RC等效电路模型,并采用遗忘递推最小二乘(FFRLS)算法进行参数辨识,结合改进后的变窗口AUKF算法估计锂电池荷电状态(SOC)。在城市道路循环(UDDS)工况下进行试验验证,并与无迹卡尔曼滤波(UKF)、自适应无迹卡尔曼滤波(AUKF)及变窗口AUKF算法进行对比,结果表明,改进后的变窗口AUKF算法将平均误差控制在0.38%以内,具有更高的精确性和收敛性。
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| Lmax | 80 | 120 | 160 | 200 |
| RMSE | 0.008 1 | 0.007 9 | 0.007 9 | 0.008 1 |
| MAE | 0.005 3 | 0.004 7 | 0.005 5 | 0.005 8 |
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| Lmax | 80 | 120 | 160 | 200 |
| RMSE | 0.008 1 | 0.007 9 | 0.007 9 | 0.008 1 |
| MAE | 0.005 3 | 0.004 7 | 0.005 5 | 0.005 8 |
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| TH | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 |
| RMSE | 0.009 8 | 0.007 8 | 0.007 9 | 0.008 1 | 0.008 5 |
| MAE | 0.007 1 | 0.003 8 | 0.004 7 | 0.004 6 | 0.005 4 |
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不同阈值下SOC均方根误差和平均绝对误差
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| TH | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 |
| RMSE | 0.009 8 | 0.007 8 | 0.007 9 | 0.008 1 | 0.008 5 |
| MAE | 0.007 1 | 0.003 8 | 0.004 7 | 0.004 6 | 0.005 4 |
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| 估算算法 | 原算法 | 改进算法 |
| RMSE | 0.012 7 | 0.007 8 |
| MAE | 0.009 2 | 0.003 8 |
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算法改进前、后SOC均方根误差和平均绝对误差
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| 估算算法 | 原算法 | 改进算法 |
| RMSE | 0.012 7 | 0.007 8 |
| MAE | 0.009 2 | 0.003 8 |
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| 估算算法 | UKF算法 | AUKF算法 | 改进算法 |
| RMSE | 0.010 7 | 0.008 1 | 0.007 8 |
| MAE | 0.010 2 | 0.006 5 | 0.003 8 |
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SOC均方根误差和平均绝对误差
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| 估算算法 | UKF算法 | AUKF算法 | 改进算法 |
| RMSE | 0.010 7 | 0.008 1 | 0.007 8 |
| MAE | 0.010 2 | 0.006 5 | 0.003 8 |
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