摘要
为研究采煤机滚筒载荷特性,并实现载荷预测,以山西高河矿E2312工作面为工程对象,利用离散元-多体动力学(DEM-MBD)双向耦合技术,构建截割耦合模型。数值模拟与工程试验的平均扭矩误差较小,证明通过双向耦合技术研究滚筒载荷的可靠性;利用希尔伯特-黄变换(HHT),分析各载荷的时频特性,研究不同运动参数下总载荷时频特性;基于长短期记忆(LSTM),以数值模拟的载荷为输入样本,实现载荷预测。结果表明:采用DEM-MBD-HHT-LSTM模型,可实现载荷特性研究和预测。通过时频特性分析发现,滚筒不同运动状态下各载荷具有辨识性和关联性;采用LSTM算法预测载荷的准确度由高到低依次为总载荷、截割载荷、牵引载荷、侧向载荷。研究结果可为采煤机自适应调速策略提供参考。
In order to study the drum load characteristics of coal mining machine and realize the load prediction,the cut-off coupling model was constructed using the two-way coupling technique of discrete element-multibody dynamics(DEM-MBD)with the E2312 working face of Shanxi Gaohe Mine as the engineering object.The average torque error between numerical simulation and engineering experiment is small,which proves that the study of roller load by two-way coupling technique is reliable.Using Hilbert-Huang transform(HHT),the time-frequency characteristics of each load were analyzed,and the time-frequency characteristics of the total load were studied under different motion parameters.Based on the long-short-term memory(LSTM),the load from numerical simulation was used as the input sample to realize the load prediction.The results show that the load characteristics and load prediction can be realized using the DEM-MBD-HHT-LSTM model.Through the time-frequency characterization,it is found that each load under different motion states of the drum is discriminative and correlative.The accuracy of load prediction using the LSTM algorithm from high to low is total load,cutoff load,traction load,and lateral load.The study can provide a reference for the adaptive speed regulation strategy of coal mining machine.
作者
王宏伟
郭军军
梁威
耿毅德
陶磊
李进
WANG Hongwei;GUO Junjun;LIANG Wei;GENG Yide;TAO Lei;LI Jin(Center of Shanxi Engineering Research for Coal Mine Intelligent Equipment,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Post-doctoral Workstation,Shanxi Coking Coal Group Co.,Ltd,Taiyuan,Shanxi 030024,China;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)
出处
《矿业研究与开发》
CAS
北大核心
2024年第9期176-185,共10页
Mining Research and Development
基金
山西省揭榜招标项目(20201101005)
山西省基础研究计划项目(202203021222082)。
作者简介
王宏伟(1977-),女,黑龙江勃利人,教授,博士生导师,主要从事煤机装备智能化、智慧矿山研究。E-mail:lntuwhw@126.com;通信作者:梁威(1993-),男,山西太原人,博士,助理研究员,主要从事煤机装备智能化研究。E-mail:liangwei01@tyut.edu.cn。
