Article(id=1311999882471244484, tenantId=1146029695717560320, journalId=1311385739772133495, issueId=1311999647825101743, articleNumber=null, orderNo=null, doi=10.6041/j.issn.1000-1298.2025.12.033, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1736784000000, receivedDateStr=2025-01-14, revisedDate=1742918400000, revisedDateStr=2025-03-26, acceptedDate=null, acceptedDateStr=null, onlineDate=1790734747759, onlineDateStr=2026-09-30, pubDate=1766592000000, pubDateStr=2025-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790734747759, onlineIssueDateStr=2026-09-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790734747759, creator=13701087609, updateTime=1790734747759, updator=13701087609, issue=Issue{id=1311999647825101743, tenantId=1146029695717560320, journalId=1311385739772133495, year='2025', volume='56', issue='12', pageStart='1', pageEnd='818', issueExtLink='null', onlineDate='null', pubDate='1766592000000', pubDateStr='2025-12-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1790734691815, creator='13701087609', updateTime=1790738411040, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1312015247465083866, tenantId=1146029695717560320, journalId=1311385739772133495, issueId=1311999647825101743, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1312015247465083867, tenantId=1146029695717560320, journalId=1311385739772133495, issueId=1311999647825101743, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=366, endPage=375, ext={EN=ArticleExt(id=1311999882706125509, articleId=1311999882471244484, tenantId=1146029695717560320, journalId=1311385739772133495, language=EN, title=Intelligent Positioning System of Sugarcane Harvester Tip Cutter Based on Bimodal and Fuzzy Adaptive PID Control, columnId=1311999707161919908, journalTitle=Transactions of the Chinese Society for Agricultural Machinery, columnName=Agricultural Equipment and Mechanization Engineering, runingTitle=null, highlight=null, articleAbstract=

Aiming to address the challenge faced by sugarcane harvester operators who rely solely on visual judgment and experience to determine cane tops' positions, making it difficult to adjust cutting height accurately and in real-time, an intelligent positioning system for sugarcane harvester top cutters was proposed based on dual-modal and fuzzy adaptive PID control. Additionally, a cluster-based knife adjustment strategy was developed based on sugarcane cluster feature recognition. The system firstly utilized the YOLO v8 instance segmentation model to detect cane tops, with a depth camera capturing depth data of sugarcane tops in real time and converting pixel coordinates into camera coordinates for height measurement. To validate the depth camera's field performance, multiple field experiments were conducted. Results showed that within a range of 50~100 cm from the sugarcane, the average relative error of the depth camera ranged from 0.189% to 0.949%. Subsequently, fuzzy rules were designed, and a microcontroller integrated with a fuzzy adaptive PID algorithm was used to control the servo motor's operating speed. The maximum rising response speed was approximately 289.36 mm/s, and the descending response speed was about 273.16 mm, with a measurement error within±1 mm. PID comparison experiments showed that fuzzy PID control, compared with traditional PID control, reduced the response time by 0.12 s, bringing it down to 1.24 s. The overshoot was decreased from 12.80 mm to 4.63 mm, the number of overshoots dropped to one, and the steady-state error stabilized within±2 mm. Finally, dynamic tests demonstrated that the system's average recognition time was 0.08 s, showcasing excellent real-time performance.

, authors=Shangping LI1, 2, Hongyu REN1, 2, Yifan MO1, 2, Yutong WEI1, 2, Chunming WEN1, 2, Kaihua LI3, authorsList=Shangping LI, Hongyu REN, Yifan MO, Yutong WEI, Chunming WEN, Kaihua LI, authorCompany=null, correspAuthors=Kaihua LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1311999890247484146, articleId=1311999882471244484, tenantId=1146029695717560320, journalId=1311385739772133495, language=CN, title=基于双模态与模糊自适应PID控制的甘蔗收获机切梢器智能定位系统研究, columnId=1311999707321303462, journalTitle=农业机械学报, columnName=农业装备与机械化工程, runingTitle=null, highlight=null, articleAbstract=

为解决甘蔗收获机驾驶员依赖肉眼和经验判断蔗梢位置,难以实时精准调整切割高度的问题,提出了一种基于双模态及模糊自适应PID控制的甘蔗收获机切梢器智能定位系统,并提出了基于甘蔗簇特征识别的簇调刀策略。系统首先利用YOLO v8实例分割模型检测蔗梢,深度相机实时采集甘蔗蔗梢的深度数据,并将像素坐标转换为相机坐标,实现高度测量,为验证深度相机在田间的实际定位效果,设计了多组田间甘蔗定位试验,结果显示,深度相机在距离甘蔗50~100 cm范围内的平均相对误差为0.189%~0.949%。随后,通过设计模糊规则,单片机结合模糊自适应PID算法,上升响应速度约为289.36 mm/s,下降响应速度约为273.16 mm/s,误差在±1 mm内。PID对比试验表明,模糊PID控制相较于传统PID控制,模糊PID响应时间缩短了0.12 s,为1.24 s,超调量由12.80 mm减少至4.63 mm,超调次数降至1次,稳态误差稳定在±2 mm以内。最后,动态试验表明,系统的平均识别时间为0.08 s,具有良好的实时性。

, authors=李尚平1, 2, 任泓宇1, 2, 莫一凡1, 2, 韦雨彤1, 2, 文春明1, 2, 李凯华3, authorsList=李尚平, 任泓宇, 莫一凡, 韦雨彤, 文春明, 李凯华, authorCompany=null, correspAuthors=李凯华, authorNote=

李尚平(1956—),男,教授,博士,主要从事智能制造技术信息化研究,E-mail:

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李凯华(1985—),男,实验师,主要从事农业机械自动化研究,E-mail:
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(in Chinese), articleTitle=Optimization of optical resonator locking based on fuzzy algorithm, refAbstract=null), Reference(id=1311999903715394410, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, doi=null, pmid=null, pmcid=null, year=2020, volume=51, issue=增刊1, pageStart=298, pageEnd=306, url=null, language=null, rfNumber=[15], rfOrder=23, authorNames=孙永佳, 周军, 李学强, journalName=农业机械学报, refType=null, unstructuredReference=孙永佳, 周军, 李学强, 等. 马铃薯联合收获机车身调平系统设计与试验[J]. 农业机械学报, 2020, 51(增刊1): 298-306., articleTitle=马铃薯联合收获机车身调平系统设计与试验, refAbstract=null), Reference(id=1311999903795086187, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, doi=null, pmid=null, pmcid=null, year=2020, volume=51, issue=Supp. 1, pageStart=298, pageEnd=306, url=null, language=null, rfNumber=[15], rfOrder=24, authorNames=SUN Yongjia, ZHOU Jun, LI Xueqiang, journalName=Transactions of the Chinese Society for Agricultural Machinery, refType=null, unstructuredReference=SUN Yongjia, ZHOU Jun, LI Xueqiang, et al. Design and experiment of leveling system for potato combine harvester chassis[J]. Transactions of the Chinese Society for Agricultural Machinery, 2020, 51(Supp. 1): 298-306. (in Chinese), articleTitle=Design and experiment of leveling system for potato combine harvester chassis, refAbstract=null), Reference(id=1311999903883166572, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, doi=null, pmid=null, pmcid=null, year=2022, volume=38, issue=6, pageStart=12, pageEnd=21, url=null, language=null, rfNumber=[16], rfOrder=25, authorNames=姚颍飞, 陈学庚, 纪超, journalName=农业工程学报, refType=null, unstructuredReference=姚颍飞, 陈学庚, 纪超, 等. 基于模糊PID控制的玉米精量播种机单体驱动器设计与试验[J]. 农业工程学报, 2022, 38(6): 12-21., articleTitle=基于模糊PID控制的玉米精量播种机单体驱动器设计与试验, refAbstract=null), Reference(id=1311999903950275437, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, doi=null, pmid=null, pmcid=null, year=2022, volume=38, issue=6, pageStart=12, pageEnd=21, url=null, language=null, rfNumber=[16], rfOrder=26, authorNames=YAO Yingfei, CHEN Xuegeng, JI Chao, journalName=Transactions of the CSAE, refType=null, unstructuredReference=YAO Yingfei, CHEN Xuegeng, JI Chao, et al. Design and experiment of a monomer driver of a precision maize planter based on fuzzy PID control[J]. Transactions of the CSAE, 2022, 38(6): 12-21. (in Chinese), articleTitle=Design and experiment of a monomer driver of a precision maize planter based on fuzzy PID control, refAbstract=null), Reference(id=1311999904042550126, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, doi=null, pmid=null, pmcid=null, year=2022, volume=53, issue=1, pageStart=186, pageEnd=191, url=null, language=null, rfNumber=[17], rfOrder=27, authorNames=朱德兰, 阮汉铖, 吴普特, journalName=农业机械学报, refType=null, unstructuredReference=朱德兰, 阮汉铖, 吴普特, 等. 水肥一体机肥液电导率远程模糊PID控制策略[J]. 农业机械学报, 2022, 53(1): 186-191., articleTitle=水肥一体机肥液电导率远程模糊PID控制策略, refAbstract=null), Reference(id=1311999904113853295, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, doi=null, pmid=null, pmcid=null, year=2022, volume=53, issue=1, pageStart=186, pageEnd=191, url=null, language=null, rfNumber=[17], rfOrder=28, authorNames=ZHU Delan, RUAN Hancheng, WU Pute, journalName=Transactions of the Chinese Society for Agricultural Machinery, refType=null, unstructuredReference=ZHU Delan, RUAN Hancheng, WU Pute, et al. Remote fuzzy PID control strategy for nutrient solution conductivity in fertigation machine[J]. Transactions of the Chinese Society for Agricultural Machinery, 2022, 53(1): 186-191. (in Chinese), articleTitle=Remote fuzzy PID control strategy for nutrient solution conductivity in fertigation machine, refAbstract=null), Reference(id=1311999904197739376, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, doi=null, pmid=null, pmcid=null, year=2023, volume=54, issue=增刊1, pageStart=93, pageEnd=102, url=null, language=null, rfNumber=[18], rfOrder=29, authorNames=薛冰, 周利明, 牛康, journalName=农业机械学报, refType=null, unstructuredReference=薛冰, 周利明, 牛康, 等. 基于自适应模糊PID的小麦播深控制系统研究[J]. 农业机械学报, 2023, 54(增刊1): 93-102., articleTitle=基于自适应模糊PID的小麦播深控制系统研究, refAbstract=null), Reference(id=1311999904269042545, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, doi=null, pmid=null, pmcid=null, year=2023, volume=54, issue=Supp. 1, pageStart=93, pageEnd=102, url=null, language=null, rfNumber=[18], rfOrder=30, authorNames=XUE Bing, ZHOU Liming, NIU Kang, journalName=Transactions of the Chinese Society for Agricultural Machinery, refType=null, unstructuredReference=XUE Bing, ZHOU Liming, NIU Kang, et al. Research on wheat sowing depth control system based on adaptive fuzzy PID[J]. Transactions of the Chinese Society for Agricultural Machinery, 2023, 54(Supp. 1): 93-102. (in Chinese), articleTitle=Research on wheat sowing depth control system based on adaptive fuzzy PID, refAbstract=null)], funds=[Fund(id=1311999900162818897, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, awardId=302210506, language=CN, fundingSource=广西民族大学科研项目(302210506), fundOrder=null, country=null), Fund(id=1311999900225733458, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, awardId=桂科AA22117006, language=CN, fundingSource=广西科技重大专项(桂科AA22117006), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1311999890536891123, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, xref=1., ext=[AuthorCompanyExt(id=1311999890666914548, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, companyId=1311999890536891123, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1.College of Electronic Information, Guangxi Minzu University, Nanning 530006, China), AuthorCompanyExt(id=1311999890675303157, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, companyId=1311999890536891123, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1.广西民族大学电子信息学院,南宁 530006)]), AuthorCompany(id=1311999890746606326, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, xref=2., ext=[AuthorCompanyExt(id=1311999890754994935, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, companyId=1311999890746606326, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2.Key Laboratory of Intelligent Unmanned System and Intelligent Equipment, Nanning 530006, China), AuthorCompanyExt(id=1311999890767577848, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, companyId=1311999890746606326, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2.广西高校智慧无人系统与智能装备重点实验室,南宁 530006)]), AuthorCompany(id=1311999891086344953, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, xref=3., ext=[AuthorCompanyExt(id=1311999891094733562, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, companyId=1311999891086344953, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3.Nanning Taiying Technology Co., Ltd., Nanning 530103, China), AuthorCompanyExt(id=1311999891107316475, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, companyId=1311999891086344953, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3.南宁钛银科技有限公司,南宁 530103)])], figs=[ArticleFig(id=1311999895276454697, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=EN, label=Fig. 1, caption=Diagram of small whole-stalk sugarcane harvester, figureFileSmall=xc4IL2sM0o+wUTMK91hJRg==, figureFileBig=Pg6N4b8I2nE2V5H5kzMHxQ==, tableContent=null), ArticleFig(id=1311999895389700906, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=CN, label=图1, caption=小型整秆式甘蔗收获机, figureFileSmall=xc4IL2sM0o+wUTMK91hJRg==, figureFileBig=Pg6N4b8I2nE2V5H5kzMHxQ==, tableContent=null), ArticleFig(id=1311999895620387627, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=EN, label=Fig. 2, caption=Structure diagram of intelligent height control system for cane harvester topping mechanism, figureFileSmall=JO97cteqq9ALORq5MIUmaw==, figureFileBig=isn7m2IUYXY1g88IqgCHVg==, tableContent=null), ArticleFig(id=1311999895687496492, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=CN, label=图2, caption=甘蔗收获机切梢器高度智能控制系统结构示意图

1. 伺服电机 2. 步进电机 3. 相机支撑臂 4. 液压马达 5. 深度相机及云台 6. 支撑柱 7. 刀盘支撑架 8. 刀盘 9. 拢蔗杆 10. 支撑液压缸

, figureFileSmall=JO97cteqq9ALORq5MIUmaw==, figureFileBig=isn7m2IUYXY1g88IqgCHVg==, tableContent=null), ArticleFig(id=1311999895762993965, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=EN, label=Fig. 3, caption=Normal distribution of cane tip height, figureFileSmall=39bGfBWb/+AXZ5T40ljXfA==, figureFileBig=wJveVHOdLYvd95Mzqc3H1A==, tableContent=null), ArticleFig(id=1311999895825908526, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=CN, label=图3, caption=蔗梢高度正态分布图, figureFileSmall=39bGfBWb/+AXZ5T40ljXfA==, figureFileBig=wJveVHOdLYvd95Mzqc3H1A==, tableContent=null), ArticleFig(id=1311999895901405999, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=EN, label=Fig. 4, caption=Illustration of the lowest point of sugarcane top mask, figureFileSmall=gbWSHsgVbCqtpfkn5OcHIA==, figureFileBig=gBff7rpnouUrimNryxJTLQ==, tableContent=null), 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1. 伺服电机 2. 刀盘支撑架 3. 刀盘 4. 深度相机及云台 5. 相机支撑臂 6. 拉线位移传感器 7. 丝杆滑台 8. 伺服电机驱动器

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Parameter settings for fuzzy PID algorithm

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参数基本论域量化因子模糊子集
e[-3 mm,3 mm]1{NB,NM,NS,ZO,PS,PM,PB}
ec[-2 mm/s,2 mm/s]3
ΔKP[-0.9,0.9]1.5
ΔKI[-0.01,0.01]1.5
ΔKD[-0.2,0.2]1.5
), ArticleFig(id=1311999899709834060, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=CN, label=表1, caption=

模糊PID算法参数设置

, figureFileSmall=null, figureFileBig=null, tableContent=
参数基本论域量化因子模糊子集
e[-3 mm,3 mm]1{NB,NM,NS,ZO,PS,PM,PB}
ec[-2 mm/s,2 mm/s]3
ΔKP[-0.9,0.9]1.5
ΔKI[-0.01,0.01]1.5
ΔKD[-0.2,0.2]1.5
), ArticleFig(id=1311999899806303053, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=EN, label=Tab. 2, caption=

Fuzzy control rule

, figureFileSmall=null, figureFileBig=null, tableContent=
参数ece
NBNMNSZOPSPMPB
KPNBNBNBNBNMNMNSZO
NMNMNBNMNMNSNSZO
NSNSNMNMNSNSZOPS
ZOZONMNSNSZOPSPS
PSPSNSNSZOPSPSPM
PMPMZOZOPSPSPMPM
PBPBZOZOPSPMPMPB
KINBZOZONSNMNMNBNB
NMZONSNSNMNMNBNB
NSNSNSNMNMNBNBNB
ZONSNSZOZOZONSNS
PSNSZOZOZOZONSNS
PMZOZOZONSNSNSNS
PBZOZOZONSNSNSNS
KDNBPSPMPBPBPBPMPS
NMZOPSPMPMPMPSZO
NSNSZOPSPSPSZONS
ZONMNSZOZOZONSNM
PSNBNMNSZOZOZONS
PMNBNBNMNSNSNSZO
PBNBNBNMNSNSZOZO
), ArticleFig(id=1311999899898577742, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=CN, label=表2, caption=

模糊控制规则

, figureFileSmall=null, figureFileBig=null, tableContent=
参数ece
NBNMNSZOPSPMPB
KPNBNBNBNBNMNMNSZO
NMNMNBNMNMNSNSZO
NSNSNMNMNSNSZOPS
ZOZONMNSNSZOPSPS
PSPSNSNSZOPSPSPM
PMPMZOZOPSPSPMPM
PBPBZOZOPSPMPMPB
KINBZOZONSNMNMNBNB
NMZONSNSNMNMNBNB
NSNSNSNMNMNBNBNB
ZONSNSZOZOZONSNS
PSNSZOZOZOZONSNS
PMZOZOZONSNSNSNS
PBZOZOZONSNSNSNS
KDNBPSPMPBPBPBPMPS
NMZOPSPMPMPMPSZO
NSNSZOPSPSPSZONS
ZONMNSZOZOZONSNM
PSNBNMNSZOZOZONS
PMNBNBNMNSNSNSZO
PBNBNBNMNSNSZOZO
), ArticleFig(id=1311999899965686607, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=EN, label=Tab. 3, caption=

System response time at different cane moving speeds

, figureFileSmall=null, figureFileBig=null, tableContent=
序号甘蔗移动位移/mm甘蔗移动速度/(mm·s-1)系统响应时间/s
1386.74140.070.455
2454.63158.630.342
3343.32166.180.392
4417.83171.380.379
5378.81210.680.376
6389.83226.650.415
7423.40247.020.424
8375.29349.430.310
), ArticleFig(id=1311999900028601168, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999882471244484, language=CN, label=表3, caption=

不同甘蔗移动速度的系统响应时间

, figureFileSmall=null, figureFileBig=null, tableContent=
序号甘蔗移动位移/mm甘蔗移动速度/(mm·s-1)系统响应时间/s
1386.74140.070.455
2454.63158.630.342
3343.32166.180.392
4417.83171.380.379
5378.81210.680.376
6389.83226.650.415
7423.40247.020.424
8375.29349.430.310
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基于双模态与模糊自适应PID控制的甘蔗收获机切梢器智能定位系统研究
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李尚平 1, 2 , 任泓宇 1, 2 , 莫一凡 1, 2 , 韦雨彤 1, 2 , 文春明 1, 2 , 李凯华 3
农业机械学报 | 农业装备与机械化工程 2025,56(12): 366-375
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农业机械学报 |农业装备与机械化工程 2025 , 56 (12) : 366 -375
基于双模态与模糊自适应PID控制的甘蔗收获机切梢器智能定位系统研究
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李尚平1, 2 , 任泓宇1, 2, 莫一凡1, 2, 韦雨彤1, 2, 文春明1, 2, 李凯华3
作者信息
  • 1.广西民族大学电子信息学院,南宁 530006
  • 2.广西高校智慧无人系统与智能装备重点实验室,南宁 530006
  • 3.南宁钛银科技有限公司,南宁 530103
通讯作者:
李凯华(1985—),男,实验师,主要从事农业机械自动化研究,E-mail:
作者简介:

李尚平(1956—),男,教授,博士,主要从事智能制造技术信息化研究,E-mail:

Intelligent Positioning System of Sugarcane Harvester Tip Cutter Based on Bimodal and Fuzzy Adaptive PID Control
Shangping LI1, 2 , Hongyu REN1, 2, Yifan MO1, 2, Yutong WEI1, 2, Chunming WEN1, 2, Kaihua LI3
Affiliations
  • 1.College of Electronic Information, Guangxi Minzu University, Nanning 530006, China
  • 2.Key Laboratory of Intelligent Unmanned System and Intelligent Equipment, Nanning 530006, China
  • 3.Nanning Taiying Technology Co., Ltd., Nanning 530103, China
出版时间: 2025-12-25 doi: 10.6041/j.issn.1000-1298.2025.12.033
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为解决甘蔗收获机驾驶员依赖肉眼和经验判断蔗梢位置,难以实时精准调整切割高度的问题,提出了一种基于双模态及模糊自适应PID控制的甘蔗收获机切梢器智能定位系统,并提出了基于甘蔗簇特征识别的簇调刀策略。系统首先利用YOLO v8实例分割模型检测蔗梢,深度相机实时采集甘蔗蔗梢的深度数据,并将像素坐标转换为相机坐标,实现高度测量,为验证深度相机在田间的实际定位效果,设计了多组田间甘蔗定位试验,结果显示,深度相机在距离甘蔗50~100 cm范围内的平均相对误差为0.189%~0.949%。随后,通过设计模糊规则,单片机结合模糊自适应PID算法,上升响应速度约为289.36 mm/s,下降响应速度约为273.16 mm/s,误差在±1 mm内。PID对比试验表明,模糊PID控制相较于传统PID控制,模糊PID响应时间缩短了0.12 s,为1.24 s,超调量由12.80 mm减少至4.63 mm,超调次数降至1次,稳态误差稳定在±2 mm以内。最后,动态试验表明,系统的平均识别时间为0.08 s,具有良好的实时性。

甘蔗收获机  /  切梢器  /  智能定位系统  /  模糊自适应PID控制  /  双模态

Aiming to address the challenge faced by sugarcane harvester operators who rely solely on visual judgment and experience to determine cane tops' positions, making it difficult to adjust cutting height accurately and in real-time, an intelligent positioning system for sugarcane harvester top cutters was proposed based on dual-modal and fuzzy adaptive PID control. Additionally, a cluster-based knife adjustment strategy was developed based on sugarcane cluster feature recognition. The system firstly utilized the YOLO v8 instance segmentation model to detect cane tops, with a depth camera capturing depth data of sugarcane tops in real time and converting pixel coordinates into camera coordinates for height measurement. To validate the depth camera's field performance, multiple field experiments were conducted. Results showed that within a range of 50~100 cm from the sugarcane, the average relative error of the depth camera ranged from 0.189% to 0.949%. Subsequently, fuzzy rules were designed, and a microcontroller integrated with a fuzzy adaptive PID algorithm was used to control the servo motor's operating speed. The maximum rising response speed was approximately 289.36 mm/s, and the descending response speed was about 273.16 mm, with a measurement error within±1 mm. PID comparison experiments showed that fuzzy PID control, compared with traditional PID control, reduced the response time by 0.12 s, bringing it down to 1.24 s. The overshoot was decreased from 12.80 mm to 4.63 mm, the number of overshoots dropped to one, and the steady-state error stabilized within±2 mm. Finally, dynamic tests demonstrated that the system's average recognition time was 0.08 s, showcasing excellent real-time performance.

sugarcane harvester  /  tip cutter  /  intelligent positioning system  /  fuzzy adaptive PID control  /  dual-modal
李尚平, 任泓宇, 莫一凡, 韦雨彤, 文春明, 李凯华. 基于双模态与模糊自适应PID控制的甘蔗收获机切梢器智能定位系统研究. 农业机械学报, 2025 , 56 (12) : 366 -375 . DOI: 10.6041/j.issn.1000-1298.2025.12.033
Shangping LI, Hongyu REN, Yifan MO, Yutong WEI, Chunming WEN, Kaihua LI. Intelligent Positioning System of Sugarcane Harvester Tip Cutter Based on Bimodal and Fuzzy Adaptive PID Control[J]. Transactions of the Chinese Society for Agricultural Machinery, 2025 , 56 (12) : 366 -375 . DOI: 10.6041/j.issn.1000-1298.2025.12.033
甘蔗是我国重要的战略经济作物,广西地区的甘蔗种植面积占全国总面积的70%。甘蔗的收获方式主要分为人工收获和机械收获,机械收获又分为整秆式收获、切断式联合收获和分布式收获。虽然人工收获具有较高的精度,但其速度较慢且人工成本较高。相比之下,机械收获效率更高,但受制于技术和设备的限制,导致甘蔗收获后的含杂率较高,难以满足糖厂对原料甘蔗的要求[1]。推进甘蔗机收、提高机收率是提高甘蔗产业竞争力的重要途径;但我国甘蔗机收推进缓慢,2023年我国甘蔗联合机收率仅3.4%,这成为制约甘蔗全程机械化推广的主要障碍[2-3]。
甘蔗机械化收获面临的一个主要问题是含杂率较高,而切梢位置的准确性是影响含杂率的主要因素。甘蔗收获机速度较快,驾驶员难以及时调整至合适的切割位置,导致切割位置的随意性较大,直接影响原料蔗的质量。为了解决这一问题,计算机视觉技术被引入农业生产中[4-5],在复杂田间环境下优化了对蔗梢分叉点的检测,通过统计,甘蔗生长点距离蔗梢30~35 cm,并使用双目相机对蔗梢分叉点高度定位,以间接确定甘蔗生长点的高度。WEN等[5]通过对齐深度图像和RGB图像,结合图像处理技术,测量甘蔗顶端切割位置的高度。
目前对甘蔗收获机的切梢装置研究较少。麻芳兰等[6]对蔗梢在榨糖过程中会降低甘蔗的出糖率,以及蔗梢部分进入甘蔗收获机物流系统不利于物流系统的正常运转、堵塞物流通道等问题,在原有物理样机上加装切梢装置。宫元娟等[7]设计了一种用于甘蔗收获机割台的随动控制系统。目的是解决国内甘蔗收获机在田间作业中割台高度无法自动调节的问题。ZHOU等[8]针对甘蔗收获机实时喂入量监测系统进行了设计与开发,以期在指导收获作业和提高作业效率方面发挥重要作用。研究结合先进的降噪和机器学习技术,实现了对喂入量的精准预测。
在农机控制系统中,PID算法凭借其简单易用、鲁棒性强的特点,成为控制精度要求较高的场景中广泛采用的方法[9-11]。
目前甘蔗收获机的切梢器高度通过液压缸来调整,速度较为缓慢,并且蔗梢位置主要依赖驾驶员的肉眼和经验判断,难以在作业中实时精准地切割到蔗梢位置,导致机收含杂率较高。为此本文提出一种基于双模态及模糊自适应PID的切梢器高度智能定位系统。系统采用YOLO v8实例分割算法对蔗梢进行精准检测,并结合奥比中光Gemini 2深度相机完成蔗梢高度定位。在切梢提升机构中增加二级提升装置,通过STM32单片机控制伺服电机转速带动丝杆滑台实现对切梢器高度的精准调整。
南宁钛银科技有限公司4GL-1型整秆式甘蔗收获机结构如图1所示,其切梢器高度调整系统由液压缸、液压马达和切梢器组成。目前,甘蔗收获机通过液压缸来调整切梢器高度,但调整速度较为缓慢。此外,驾驶员仅能通过肉眼和经验在驾驶室中判断蔗梢位置,在实际作业过程中难以实时、精准地调整切割位置,从而影响切割精度。
为了解决这一问题,本文提出一种切梢器高度智能控制系统,图2为切梢器高度智能控制系统结构图。该系统主要由伺服电机、步进电机、相机支撑臂、液压马达、深度相机及云台、支撑柱、刀盘支撑架、刀盘、拢蔗杆和支撑液压缸组成。切梢器部分由刀盘及刀盘支撑架构成,其安装架通过支撑柱与甘蔗收获机铰链连接。识别部分由步进电机、相机支撑臂、深度相机及云台组成。深度相机安装在切梢器前方,在实际测试中,该位置所捕捉的图像中,灰尘不会对画面质量产生明显影响。
该系统包括识别定位系统和控制系统。在识别定位系统中,系统通过深度相机结合YOLO v8实例分割算法,实现蔗梢分叉点的识别与高度测量。
在控制系统中,STM32单片机通过控制伺服电机的运行,实现对丝杆滑台的动态调节,从而调整切梢器的高度。
为研究切梢器升降范围,本研究通过田间采样调查对甘蔗蔗梢的高度分布进行了分析,结果如图3所示,中蔗9号的蔗梢平均高度的分布密度平均值为294.37 cm,其1个标准差范围为±27.82 cm,约占统计数据的68%,2个标准差范围为±55.64 cm,约占统计数据的95%,3个标准差范围为±83.46 cm,约占统计数据的99.7%。中蔗福农44号的蔗梢平均高度分布密度平均值为260.91 cm,其1个标准差范围约为±21.41 cm,约占统计数据的68%,2个标准差范围为±45.312 cm,约占统计数据的95%,3个标准差范围为±63.23 cm,约占统计数据的99.7%。
在切梢装置初调高度后,由于液压缸的调整速度较慢,需要合理确定调刀区间。通过分析蔗梢高度分布,将调刀区间设置在±30 cm范围内,可覆盖两个甘蔗品种中74.77%和83.33%的蔗梢高度。
对于超出±30 cm范围的蔗梢,主要包括两种情况:未成熟甘蔗,其含糖量远低于成熟甘蔗;高度超出范围的甘蔗,虽然含糖量较高,但数量较少,整体含糖量不如主要部分。因此,为收获少量特殊甘蔗而牺牲大部分成熟甘蔗的意义不大。
综合考虑作业效率和甘蔗质量,最终将调刀区间设定在±30 cm内。为了满足该范围的调整需求,切梢装置采用丝杆滑台,滑台的行程选定为60 cm。这样的设计能够在不影响主要收获部分的情况下最大限度地提升作业效率,确保收获质量。
蔗梢识别系统是视觉模态和深度模态的结合。视觉模态利用YOLO v8实例分割算法对蔗梢分叉点进行精准检测,深度模态通过深度相机测量蔗梢高度,实现三维空间定位。
YOLO(You Only Look Once)系列算法是一种物体检测识别智能算法,具有检测速度快和准确度高的优点[12]。YOLO v8-Seg是YOLO v8的实例分割模型。与传统物体检测模型相比,实例分割模型在head部分增加了原型掩码分支和掩码系数,用于生成实例掩码[13],这一方法由YOLACT提出。鉴于需要在甘蔗收获机上部署,本文选择了最小的模型YOLO v8n-Seg用于蔗梢的检测。
本文使用奥比中光Gemini 2深度相机作为识别与定位的硬件设备,Gemini 2使用双目结构光技术实时获取深度信息,并通过算法将深度图像与彩色图像进行匹配,若想获取目标点的相对高度,需要建立相机坐标系。
使用OrbbecViewer上位机对Gemini 2深度相机进行标定。内参包括:焦距fx为690.98像素、fy为690.91像素、主点坐标cx为638.98像素、cy为357.83像素。
当本文模型识别到蔗梢后(如图4),可获取识别到的蔗梢掩码的最低点像素坐标(ux,vy)。深度相机获取该像素点对应的深度值Zc,该深度表示从相机到目标物体的距离。将像素坐标(ux,vy)转换为相机坐标系中的三维坐标(Xc,-Yc,Zc),具体公式为
相机坐标系的建立如图5所示,以相机的焦点为原点,以光轴为Z轴建立三维直角坐标系,X轴和Y轴方向与图像坐标系的x轴和y轴方向吻合。获取目标点(Xc,Yc,Zc),Xc是相对于相机的水平偏移量,如果Xc为正数,则该点在相机的右侧,如果Xc为负数,则该点在相机的左侧;Yc表示该点相对于相机的垂直偏移量,如果Yc为正数,则该点在相机的下方,如果Yc是负数则该点在相机的上方,Zc表示点距离相机的远近。由于相机坐标系的Y轴是垂直向下,因此在测量目标时,实际高度应取相反数作为真实测量值,即(Xc,-Yc,Zc)。测量目标的相对高度为-Yc,绝对高度为-Yc加上相机安装高度。
蔗梢识别的关键特征为蔗梢的分叉特征,这是甘蔗收获过程中参考特征,而切割位置需位于甘蔗的生长点。根据统计,甘蔗生长点距离分叉点下约35 cm,因此系统通过深度相机测量分叉点高度后,减去35 cm计算得到切割点位置。
鉴于甘蔗以簇形式生长,本文通过对甘蔗簇特征进行识别,并将每簇甘蔗蔗梢的高度取平均值输出,以便甘蔗收获机调整切梢器高度,提高甘蔗收获效率。为此,本文对第2年宿根蔗的甘蔗簇内最大距离进行了统计分析。不同品种甘蔗簇内最大距离的统计结果如图6所示,中蔗9号簇内最大距离的分布密度主要集中在20.59 cm,其1个标准差约为±3.36 cm,约占统计数据的68%。2个标准差范围为±6.72 cm,约占统计数据的95%,3个标准差范围为±10.8 cm,约占统计数据的99.7%。而中蔗福农44号簇内最大距离的分布密度主要集中在19.6cm,其1个标准差约为±3.31 cm,分布特性与中蔗9号相似。统计分析表明,这两个品种的簇内距离大部分在27 cm以内。
为了提高甘蔗收获效率并应对切梢器调整速度较慢的问题,本文提出了一种基于甘蔗簇特征识别的控制策略。甘蔗通常以簇的形式生长,并且簇内蔗梢之间的距离大多数小于27 cm,而簇与簇之间的距离在30~40 cm。
为了解决多根甘蔗同时被识别的情况,本文进一步采用深度优先搜索(DFS)算法对甘蔗簇进行分组。首先,系统通过相机和深度相机获取甘蔗蔗梢的三维坐标(Xc,-Yc,Zc),并将这些坐标存储在数组中。接着,设定一个距离阈值27 cm,使用pdist函数计算每对甘蔗之间的水平距离,并将生成的距离向量通过squareform函数转化为距离矩阵。通过DFS算法遍历距离矩阵,系统将距离小于27 cm的甘蔗蔗梢归为同一簇,并根据每簇的所有蔗梢的坐标(Xc,-Yc,Zc)求得平均值,作为该簇的三维坐标。
甘蔗收获机的作业识别过程如图7所示,系统通常会同时识别到多簇甘蔗。系统实时识别每簇的蔗梢平均分叉点位置,并根据其相对位置来判断切割的优先级。首先,记录每簇的X坐标和Y坐标,并根据X坐标选择距离切梢器最近的簇进行优先切割。这样可以确保系统在进行切割时,优先处理离收获机最近的目标点,从而优化作业效率。一旦当前簇的甘蔗切割完成,系统将重新评估当前画面中的所有目标点,并更新优先级,选择距离切梢器最近的簇进行下一步切割。通过这种动态优先级更新策略,系统能够实时适应田间环境的变化,并持续优化切割过程,确保作业的高效性和精确度。
模糊PID切梢器智能定位控制系统结构如图8所示,深度相机实时采集甘蔗蔗梢的三维空间高度数据,并计算当前切梢器位移与目标切梢高度之间的偏差e。模糊PID控制器将偏差e和偏差变化率ec作为输入变量,经过模糊推理和PID参数自适应调整,动态调节伺服电机的转速。随着切梢器位移逐渐接近目标高度,伺服电机转速逐步减小,最终实现对目标位置的精确控制。
在切梢器高度调节中,由于甘蔗田间环境复杂、蔗梢高度分布存在随机性,传统PID控制在参数固定的情况下,难以适应动态环境的变化需求,可能导致超调、振荡或响应滞后[14-16]。而模糊PID控制可以根据控制经验和规则,对复杂系统的动态行为进行推理和调整,因此成为切梢器高度调节的有效解决方案。
在切梢器高度控制中,模糊控制器以切梢器高度偏差e和偏差变化率ec为输入,通过模糊推理生成伺服电机的控制参数修正量ΔKP、ΔKI、ΔKD,实时调整伺服电机的转速,使切梢器能够快速接近目标高度并保持稳定。
模糊PID控制器的输入变量包括切梢器高度偏差e和切梢器高度偏差变化率ec。输出变量包括PID参数修正量ΔKP、ΔKI、ΔKD。其中,输入变量e、ec和输出变量ΔKP、ΔKI、ΔKD的可行区间如表1所示。
根据PID参数调整原则及甘蔗收获机切梢器实际调节过程和经验[17-18],建立模糊控制规则,模糊控制规则如表2所示,为调高控制精度,将变量等级划分为7级,分别为NB(负大)、NM(负中)、NS(负小)、ZO(零)、PS(正小)、PM(正中)、PB(正大)。描述输入偏差和偏差变化率对输出参数修正量的影响关系。当偏差e较大时,伺服电机的控制量应迅速增大以快速逼近目标高度;当偏差变化率ec较大时,控制量调整应趋于平缓以避免系统振荡。
当偏差e为正中值且偏差变化率ec较小时,伺服电机转速应适度提高以迅速接近目标高度;当偏差e较小时(NS)且偏差变化率ec接近零,伺服电机转速应降低以实现平稳调整。模糊推理的结果经过逆模糊化处理后,生成PID控制器的参数修正量。
本设计的控制系统旨在实现甘蔗收获机切梢器的智能定位和精准控制。通过深度相机和拉线位移传感器获取实时高度信息,结合STM32单片机进行逻辑控制,利用模糊PID算法动态调整切梢器的高度,以保证切割操作的精确性和高效性。系统整体如图9所示,包括奥比中光深度相机Gemini 2、Jetson Orin NX、STM32F103ZET6单片机、RS485转TTL模块、拉线位移传感器、伺服电机及其驱动器。
控制流程图如图10所示,整体工作流程为:深度相机实时获取甘蔗蔗梢的目标高度数据,随后将蔗梢高度数据传输至STM32单片机,STM32单片机可实时获取切梢器的实际高度,通过对目标高度和实际高度的比较,实时计算高度偏差e和偏差变化率ec。偏差e的计算公式为
式中
      htarget——深度相机测量的蔗梢高度
      hcurrent——切梢器高度
偏差变化率ec为
式中
      Δe——当前时刻误差和上一时刻误差的差值
      Δt——两次采样/控制更新之间的时间差
在模糊PID控制模块中,STM32单片机对偏差e和偏差变化率ec进行模糊化处理,生成模糊语言变量E和EC。通过模糊规则表进行推理,得出控制参数修正值ΔKP、ΔKI、ΔKD。随后,STM32通过去模糊化处理,将模糊推理结果转化为具体的PID参数调整值。动态调整后的PID参数会直接应用于控制器。更新后的PID控制器在STM32上运行,生成伺服电机的速度控制信号。
伺服电机根据模糊PID控制模块生成的速度控制信号,执行正向或反向调整操作,以逐步接近目标高度位置。在调整过程中,切梢器的实时位置信息通过拉线位移传感器反馈至系统。系统根据反馈信息动态计算偏差并生成新的控制信号,持续调整伺服电机的运行状态,直至切梢器达到目标高度。
试验旨在验证模糊自适应PID切梢器智能定位控制系统的性能,建立了模糊自适应PID切梢器智能定位控制系统试验平台,如图11所示,包括奥比中光Gemini 2深度相机、Jetson Orin NX开发板、STM32F103ZET6单片机、拉线位移传感器、伺服电机及其驱动器、铝型材、刀盘支撑架和切梢刀盘。其中,深度相机用于实时采集甘蔗蔗梢的三维空间高度数据,Jetson Orin NX将采集到的数据通过串口传输到STM32F103ZET6单片机,通过模糊PID算法动态调节伺服电机转速,以实现切梢器高度的精准调整。
试验在切梢器智能定位试验平台上进行,位移传感器记录切梢器的实时位置,伺服电机驱动切梢器进行高度调整。试验通过模拟切梢器的实际工作状态,对比模糊PID控制和传统PID控制的性能。
试验方法包括分别设置传统PID控制和模糊PID控制两种控制方式,记录切梢器从相同初始位置到相同目标位置的调节过程数据,并以响应时间、超调量和超调次数作为主要评价指标。
试验结果如图12所示,数据通过位移传感器实时采集切梢器的高度变化。结果表明,在响应时间方面,模糊PID在300.82 mm达到稳态,误差为0.82 mm,响应时间仅为1.24 s;相比之下,传统PID在298.91 mm达到稳态,误差为-1.09 mm,响应时间为1.36 s,模糊PID响应时间缩短了0.12 s。在超调高度方面,模糊PID的超调高度仅为4.63 mm,而传统PID需要2次超调才能达到目标高度,分别出现12.80 mm和-3.56 mm的超调现象。
综合分析可见,模糊PID控制器在响应速度和稳定性方面表现更优,能够更快、更稳定地接近目标高度,提高了系统的动态适应性和控制性能。
为了验证切梢器智能定位系统的工作可靠性,对控制系统进行了响应时间检测试验,重点评估最大范围高度调节过程中的响应速度、响应时间以及超调现象。
通过位移传感器实时采集切梢器的高度变化,试验结果如图13所示,在上升过程中,系统的响应速度为289.36 mm/s,在300.84 mm达到稳态,响应时间为2.11 s,误差为0.84 mm。在下降过程中,响应速度为273.16 mm/s,在-299.13 mm达到稳态,响应时间为2.24 s,误差为-0.87 mm。
在调节过程中,系统出现了轻微的超调现象。在上升阶段,超调量为5.72 mm;在下降阶段,超调量为5.64 mm。综合试验结果可见,该系统在最大高度调节范围内表现出优异的响应性能和稳定性。
为验证深度相机在田间的实际定位效果,本文设计了深度相机在距离蔗梢50、75、100 cm处的3组试验,并进行实际测量。相机识别的高度以相机光心为基点,光心位置为相机的中心线位置,即识别出的蔗梢高度与相机中心线高度相加后得到测量的蔗梢高度。试验结果如图14、15所示,深度相机在距离蔗梢50 cm处的绝对误差为0~1 cm,75 cm处的绝对误差为1~3 cm,100 cm处的绝对误差为2~4 cm,平均相对误差分别为0.189%、0.675%和0.949%。随着相机与蔗梢距离的增加,测量误差逐渐增大。造成这种现象的主要原因是Gemini 2深度相机采用的双目结构光技术,当距离增加时,单个像素覆盖的物体表面积增大,导致深度分辨率下降,从而放大了测量误差。试验表明,相机在距离蔗梢100 cm范围内的平均相对误差满足甘蔗收获机的需求。
动态识别定位试验旨在测试控制系统与识别系统的动态追踪能力。试验过程如图16所示,人工手握甘蔗由下至上进行移动识别。同时控制切梢器调整至目标位置。深度相机实时跟踪蔗梢的高度变化并记录识别反应时间,单片机记录拉线传感器切梢器的调节位移。记录深度相机高度,并且使用伸缩尺来测量实际蔗梢高度,深度相机实时跟踪蔗梢的高度变化。该系统的响应时间为从系统检测到甘蔗顶部高度变化(深度相机识别)到切梢器完成调整之间的时间。
试验结果如图16、17及表3所示,在蔗梢以不同的速度(140.07~349.43 mm/s)上下移动条件下,平均响应时间为0.387 s,平均识别时间为0.08 s。
(1)为解决甘蔗收获机驾驶员仅依赖肉眼和经验判断蔗梢位置,难以实时精准调整切割高度的问题,提出了一种基于模糊自适应PID控制和深度相机结合的切梢器智能定位系统。利用深度相机结合YOLO v8实例分割模型,系统能够实时检测蔗梢位置,将像素坐标转换为相机坐标,并获取蔗梢高度。试验结果表明,深度相机在距离蔗梢50、75、100 cm处的平均相对误差分别为0.189%、0.675%和0.949%,能够满足田间甘蔗机械收获的精度需求,具有较高的精准性。
(2)相比传统PID控制器,模糊自适应PID控制器在响应速度、超调量及稳态误差方面表现优越。试验数据表明,模糊PID控制器将切梢器超调量由传统PID的12.80 mm减少至4.63 mm,模糊PID响应时间缩短了0.12 s,为1.24 s,稳态误差控制在±2 mm以内,具有良好的动态适应性与稳定性。
  • 广西民族大学科研项目(302210506)
  • 广西科技重大专项(桂科AA22117006)
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doi: 10.6041/j.issn.1000-1298.2025.12.033
  • 接收时间:2025-01-14
  • 首发时间:2026-09-30
  • 出版时间:2025-12-25
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  • 收稿日期:2025-01-14
  • 修回日期:2025-03-26
基金
广西民族大学科研项目(302210506)
广西科技重大专项(桂科AA22117006)
作者信息
    1.广西民族大学电子信息学院,南宁 530006
    2.广西高校智慧无人系统与智能装备重点实验室,南宁 530006
    3.南宁钛银科技有限公司,南宁 530103

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李凯华(1985—),男,实验师,主要从事农业机械自动化研究,E-mail:
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2种不同金属材料的力学参数
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占总种数比例
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属
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Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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