Drum Load Characteristics and Load Prediction of Coal Mining Machine
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.
万方数据
维普
