Article(id=1241406723555127764, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241406711219680205, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2024.06.031, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1716566400000, receivedDateStr=2024-05-25, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773904027117, onlineDateStr=2026-03-19, pubDate=1732982400000, pubDateStr=2024-12-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773904027117, onlineIssueDateStr=2026-03-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773904027117, creator=13701087609, updateTime=1773904027117, updator=13701087609, issue=Issue{id=1241406711219680205, tenantId=1146029695717560320, journalId=1235980550691926019, year='2024', volume='44', issue='6', pageStart='1', pageEnd='174', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773904024176, creator=13701087609, updateTime=1773911273793, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241437118384362345, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241406711219680205, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241437118388556650, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241406711219680205, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=144, endPage=150, ext={EN=ArticleExt(id=1241406725098631656, articleId=1241406723555127764, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Weighted Prediction Model of Hot Rolled Strip Crown Based on Random Forest and Support Vector Machine, columnId=1236276108207902848, journalTitle=Mining and Metallurgical Engineering, columnName=MATERIALS, runingTitle=null, highlight=null, articleAbstract=
In view of low prediction accuracy and slow speed of traditional prediction methods for strip crown, a weighted prediction model based on random forest (RF) and support vector machine (SVM) was established. The parameters of models based on RF, SVM, and a combination of RF and SVM were optimized respectively by adopting the improved coati optimization algorithm (ICOA), so as to improve crown prediction accuracy. A 1 580 mm production line of a hot-rolling mill in one company was taken in a simulation research on crown prediction based on its actual measurement. The root mean square error of the weighted prediction model based on RF and SVM is 2.23 μm. It is found that this weighted prediction model has its prediction accuracy increased by 7.08% and 2.62% respectively, compared with the models based on RF and SVM respectively.
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针对传统带钢凸度预测方法预测精度低、速度慢的问题,建立了基于随机森林和支持向量机的热轧带钢凸度加权预测模型。采用改进长鼻浣熊算法分别对随机森林、支持向量机和随机森林与支持向量机加权预测模型的参数进行优化,提高凸度预测精度。以某公司热轧1 580 mm生产线实测数据进行凸度预测仿真研究,随机森林与支持向量机加权预测模型的均方根误差为2.23 μm,与随机森林模型、支持向量机模型预测精度进行比较,加权预测模型的精度分别提高了7.08%、2.62%。
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周亚罗(1982—),女,河北安平人,硕士,副教授,主要研究方向为复杂系统的建模与控制。E-mail:550589525@qq.com
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周亚罗(1982—),女,河北安平人,硕士,副教授,主要研究方向为复杂系统的建模与控制。E-mail:550589525@qq.com
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测试函数适应度值收敛曲线(a)f1收敛曲线;(b)f2收敛曲线;(c)f3收敛曲线;(d)f4收敛曲线
, figureFileSmall=T3LVnfd2BUtOlrx7Q/S+hw==, figureFileBig=xp3uBqhM0+z0uhNWirLP8g==, tableContent=null), ArticleFig(id=1241406744757334378, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241406723555127764, language=EN, label=null, caption=null, figureFileSmall=T6KKr0xGm9W0sm05n99ZjA==, figureFileBig=G6as//06lZFtL8mZVxXW3A==, tableContent=null), ArticleFig(id=1241406744837026156, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241406723555127764, language=CN, label=图6, caption=
RF预测模型收敛曲线, figureFileSmall=T6KKr0xGm9W0sm05n99ZjA==, figureFileBig=G6as//06lZFtL8mZVxXW3A==, tableContent=null), ArticleFig(id=1241406744916717933, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241406723555127764, language=EN, label=null, caption=null, figureFileSmall=b6EItJkLJxuq7cLMt9cFPA==, figureFileBig=tP2EAOC4t4Ecq6T2t2adWw==, tableContent=null), ArticleFig(id=1241406745004798319, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241406723555127764, language=CN, label=图7, caption=
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RF与SVM加权预测模型收敛曲线, figureFileSmall=g1irI5a3s464x7om1Ujo/g==, figureFileBig=ZY6dRGn8YLeWrFFu1RTlCA==, tableContent=null), ArticleFig(id=1241406745222902133, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241406723555127764, language=EN, label=null, caption=null, figureFileSmall=HnsFw/8kwiga7BuqsaTwjw==, figureFileBig=Q1O3vgT+XCiVb0bHcGVf/w==, tableContent=null), ArticleFig(id=1241406745294205303, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241406723555127764, language=CN, label=图9, caption=
预测结果对比, figureFileSmall=HnsFw/8kwiga7BuqsaTwjw==, figureFileBig=Q1O3vgT+XCiVb0bHcGVf/w==, tableContent=null), ArticleFig(id=1241406745357119865, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241406723555127764, language=EN, label=null, caption=null, figureFileSmall=CXsXS7TzKq+F324xYif4FQ==, figureFileBig=dGr+QDS9MKzo3T2xVUuuRw==, tableContent=null), ArticleFig(id=1241406745453588858, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241406723555127764, language=CN, label=图10, caption=
预测误差对比, figureFileSmall=CXsXS7TzKq+F324xYif4FQ==, figureFileBig=dGr+QDS9MKzo3T2xVUuuRw==, tableContent=null), ArticleFig(id=1241406745545863547, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241406723555127764, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 测试函数 | 定义域 | 最小值 |
|---|
 | [-100,100] | 0 |
 | [-10,10] | 0 |
 | [-100,100] | 0 |
 | [-1.28,1.28] | 0 |
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测试函数
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| 测试函数 | 定义域 | 最小值 |
|---|
 | [-100,100] | 0 |
 | [-10,10] | 0 |
 | [-100,100] | 0 |
 | [-1.28,1.28] | 0 |
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| 函数 | 不同算法求解指标平均值 |
|---|
| ICOA | COA | PSO |
|---|
| f1 | 0 | 0 | 21.599 4 |
| f2 | 6.765 7×10-262 | 3.656 9×10-196 | 0.395 7 |
| f3 | 0 | 0 | 582.341 2 |
| f4 | 2.912 2×10-05 | 5.666 8×10-05 | 0.015 16 |
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测试函数求解指标统计
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| 函数 | 不同算法求解指标平均值 |
|---|
| ICOA | COA | PSO |
|---|
| f1 | 0 | 0 | 21.599 4 |
| f2 | 6.765 7×10-262 | 3.656 9×10-196 | 0.395 7 |
| f3 | 0 | 0 | 582.341 2 |
| f4 | 2.912 2×10-05 | 5.666 8×10-05 | 0.015 16 |
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| 序号 | 特征参数 | 单位 |
|---|
| 1~7 | 工作辊有效凸度(F1~F7) | mm |
| 8~14 | 出口厚度(F1~F7) | mm |
| 15~21 | 轧制力(F1~F7) | kN |
| 22~28 | 弯辊力(F1~F7) | kN |
| 29~35 | 窜辊量(F1~F7) | mm |
| 36 | 宽度 | mm |
| 37 | 中间坯凸度 | mm |
| 38 | 中间坯厚度 | mm |
| 39 | 精轧入口温度 | ℃ |
| 40 | 精轧出口温度 | ℃ |
| 41 | 穿带速度 | m/s |
| 42 | 末机架出口凸度 | mm |
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预测模型输入参数与输出参数列表
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| 序号 | 特征参数 | 单位 |
|---|
| 1~7 | 工作辊有效凸度(F1~F7) | mm |
| 8~14 | 出口厚度(F1~F7) | mm |
| 15~21 | 轧制力(F1~F7) | kN |
| 22~28 | 弯辊力(F1~F7) | kN |
| 29~35 | 窜辊量(F1~F7) | mm |
| 36 | 宽度 | mm |
| 37 | 中间坯凸度 | mm |
| 38 | 中间坯厚度 | mm |
| 39 | 精轧入口温度 | ℃ |
| 40 | 精轧出口温度 | ℃ |
| 41 | 穿带速度 | m/s |
| 42 | 末机架出口凸度 | mm |
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| 模型名称 | 种群大小 | 最大迭代次数 | 上限 | 下限 |
|---|
| RF预测模型 | 30 | 50 | 500 | 10 |
| SVM预测模型 | 30 | 50 | 256 | -256 |
| RF与SVM加权预测模型 | 30 | 50 | 1 | -1 |
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预测模型寻优参数设置
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| 模型名称 | 种群大小 | 最大迭代次数 | 上限 | 下限 |
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| RF预测模型 | 30 | 50 | 500 | 10 |
| SVM预测模型 | 30 | 50 | 256 | -256 |
| RF与SVM加权预测模型 | 30 | 50 | 1 | -1 |
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| 预测模型 | 误差指标 |
|---|
| MSE/mm2 | MAPE/% |
|---|
| RF | 5.76×10-6 | 4.83 |
| SVM | 5.24×10-6 | 4.53 |
| RF-SVM | 4.98×10-6 | 4.43 |
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| 预测模型 | 误差指标 |
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| MSE/mm2 | MAPE/% |
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| RF | 5.76×10-6 | 4.83 |
| SVM | 5.24×10-6 | 4.53 |
| RF-SVM | 4.98×10-6 | 4.43 |
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| 预测模型 | 命中率(±5 μm)/% |
|---|
| RF | 96.3 |
| SVM | 96.7 |
| RF-SVM | 97.3 |
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不同误差凸度命中率
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| 预测模型 | 命中率(±5 μm)/% |
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| RF | 96.3 |
| SVM | 96.7 |
| RF-SVM | 97.3 |
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