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A spindle thermal error modeling based on 1DCNN-GRU-Attention architecture under controlled ambient temperature and active cooling

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Abstract

Ambient temperature control and active internal cooling can effectively reduce the impact of spindle thermal error. At the same time, the residual spindle thermal error fluctuates violently, which makes it difficult to predict the thermal error accurately. To combat this issue, experiments to identify the spindle thermal error with constant and variable spindle speed spectrums were designed. A deep learning model is proposed for thermal error prediction, wherein speed parameter is incorporated as an input variable alongside temperature variables. The proposed model adopts a 1D convolutional neural network-gated recurrent unit-attention (1DCNN-GRU-Attention) architecture. Within this model, the 1DCNN module is responsible for managing the highly collinear input data and extracting spatial information, followed by the GRU module which extracts temporal information. Furthermore, the attention mechanism of the model can re-weight the learned features. Ultimately, the regression layer is responsible for predicting thermal error. To verify the proposed model’s effectiveness, it was compared against seven other thermal error prediction models. The experimental results revealed that the convolutional module of the proposed model is highly effective and can replace the traditional temperature-sensitive point selection (TPS) method. Under multiple coupled factors, the proposed method achieved a prediction accuracy of 81.53%, with root-mean-square error (RMSE) lower than the traditional method by 40%.

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Funding

This work was supported by the Ministry of Science and Technology (No. 2018YFB1306802) and the National Natural Science Foundation of China (Nos. 51975344 and 52075337).

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Authors and Affiliations

  1. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China

    Guangjie Jia, Xu Zhang & Xingzhao Wang

  2. Huazhong University of Science and Technology Wuxi Research Institute, Wuxi, 214174, Jiangsu, China

    Xianpeng Zhang

  3. State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Nuodi Huang

Authors
  1. Guangjie Jia
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  2. Xu Zhang
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  3. Xingzhao Wang
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  4. Xianpeng Zhang
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  5. Nuodi Huang
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Guangjie Jia, Xu Zhang, and Nuodi Huang. The first draft of the manuscript was written by Guangjie Jia, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Nuodi Huang.

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Jia, G., Zhang, X., Wang, X. et al. A spindle thermal error modeling based on 1DCNN-GRU-Attention architecture under controlled ambient temperature and active cooling. Int J Adv Manuf Technol 127, 1525–1539 (2023). https://doi.org/10.1007/s00170-023-11616-6

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