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基于深度宽卷积残差收缩网络的球磨机负荷状态诊断
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A State Detection Method of Ball Milling Load Based on Deep Wide Residual Shrinkage Networks
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    针对磨矿复杂工况下球磨机负荷状态准确诊断的难题,提出一种基于深度宽卷积残差收缩网络(Deep Wide Residual Shrinkage Networks, DWRSNs)的球磨机负荷状态诊断方法.首先采用宽卷积神经网络提取振动信号短时特征,建立三层深度残差收缩网络,利用软阈值函数进行非线性变换,再基于注意力机制模块自主学习阈值提取面向负荷状态的高级特征,通过全连接层、softmax层实现球磨机负荷状态的准确分类与判别.实测结果证明,本文提出的DWRSNs方法的拟合度、收敛速度及学习能力均优于现有DCNNs、ResNets和DRSNs诊断方法,且提取的振动信号特征具有高代表性,经TSNE可视化后簇内紧密度高、簇间分界明显.本文方法诊断测试集的准确率超过99%,交叉熵损失为0.077 2,相较于现有负荷状态诊断方法具有更高的准确率且诊断耗时更短,可实现球磨机负荷状态的准确判别,为选冶磨矿过程优化控制、提高磨矿效率提供有效、可靠的判据.

    Abstract:

    Aiming at the problem of accurate diagnosis of ball milling load state under complex grinding conditions, a load state diagnosis method of ball milling based on Deep Wide Residual Shrinkage Networks (DWRSNs) is proposed. Firstly, a wide-convolutional neural network is used to extract the short-term features of the vibration signal, a three-layer deep residual shrinkage network is established, and a soft threshold function is used for nonlinear transformation. Then, the advanced features of the load state oriented are extracted based on the self-learning threshold of the attention mechanism module. And discrimination of the load state of the ball milling is realized through the full-connection layer and the soft layer. The measured results prove that the DWRSNs method proposed in this paper is superior to the existing DCNN, ResNets, and DRSNs diagnostic methods in terms of fit, convergence speed, and learning ability. Meanwhile, the exacted vibration signal features are highly representative, the compactness within the cluster is high, and the boundary between the clusters is obvious after TSNE visualization. The accuracy of the DWRSNs diagnostic test set of the proposed method exceeds 99%, and the cross-entropy loss is 0.0772. Compared with the existing load state diagnosis method, it has higher accuracy and less time-consuming diagnosis and can achieve accurate identification of the load state of the ball milling and provide an effective and reliable criterion for optimizing the control of the process of beneficiation and grinding and improving the efficiency of grinding.

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高云鹏 ?,孟雪晴 ,张其旺 ,王庆凯 ,杨佳伟 ,董一隆 .基于深度宽卷积残差收缩网络的球磨机负荷状态诊断[J].湖南大学学报:自然科学版,2023,(2):102~111

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  • 在线发布日期: 2023-03-06
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