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Thermal error modeling of machine tool based on fuzzy c-means cluster analysis and minimal-resource allocating networks

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Abstract

Thermal deformation in machine tools is one of the most significant causes of machining errors. A new approach to predict the thermal error of machine tool is proposed. The temperature variables and the thermal errors are measured using the Pt-100 thermal resistances and eddy current sensors respectively. Fuzzy c-means clustering method is conducted to identify the temperatures, and the representative as an independent variable are selected meanwhile it eliminates the coupling among the variables. The learning and prediction of the thermal errors is achieved using minimal-resource allocating networks by treating the issue as functional mapping between the thermal shifts and the temperature variables. The network is made to predict the error map of a machining center. A traditional radial basis function model is introduced for comparison. The experiment result shows that the fuzzy c-means clustering method and minimal-resource allocating networks combination is a fast and accurate method for thermal error compensation in machine tools.

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Authors and Affiliations

  1. Department of Precision Instruments and Mechanology, Tsinghua University, Beijing, 100084, China

    Jian Han, Liping Wang, Ningbo Cheng & Haitong Wang

Authors
  1. Jian Han
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  2. Liping Wang
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  3. Ningbo Cheng
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  4. Haitong Wang
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Correspondence to Jian Han.

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Han, J., Wang, L., Cheng, N. et al. Thermal error modeling of machine tool based on fuzzy c-means cluster analysis and minimal-resource allocating networks. Int J Adv Manuf Technol 60, 463–472 (2012). https://doi.org/10.1007/s00170-011-3619-5

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  • DOI: https://doi.org/10.1007/s00170-011-3619-5

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