用神经网络融合多模态数据,预测热冲压过程的温度变化。
Physics-Informed Neural Networks and Sequence Encoder: Application to heating and early cooling of thermo-stamping process
- 结合序列编码器与物理信息神经网络,处理时序图像等多源数据。
- 在合成数据上训练的模型可泛化到真实实验数据,预测准确率高。
- 适合研究复合材料热成型、需快速模拟温度场的工程人员。
此前工作(Elaarabi et al., 2025b)提出了用于在线动态系统识别的序列编码器(Sequence Encoder)及其与物理信息神经网络(PINN)的结合(PINN-SE),并在合成与真实数据上验证。该方法能将时间序列编码为特征向量,由PINN映射系统动态行为,预测参数、初值和边界条件变化下的响应。此前测试仅限于简单一维问题及单维时间序列输入。本文探索将PINN-SE应用于更真实的场景:连续纤维增强热塑性复合材料的热冲压过程中的加热与早期冷却阶段。同时研究扩展输入至多模态数据(如时间序列二维图像)及可变几何结构的可能性。结果表明,结合多个编码器可行;基于实验数据生成的合成数据训练的模型,可在未见的真实实验数据上实现良好泛化性能。
原文摘要 · Abstract (English)
In a previous work (Elaarabi et al., 2025b), the Sequence Encoder for online dynamical system identification (Elaarabi et al., 2025a) and its combination with PINN (PINN-SE) were introduced and tested on both synthetic and real data case scenarios. The sequence encoder is able to effectively encode time series into feature vectors, which the PINN then uses to map to dynamical behavior, predicting system response under changes in parameters, ICs and BCs. Previously (Elaarabi et al., 2025b), the tests on real data were limited to simple 1D problems and only 1D time series inputs of the Sequence Encoder. In this work, the possibility of applying PINN-SE to a more realistic case is investigated: heating and early cooling of the thermo-stamping process, which is a critical stage in the forming process of continuous fiber reinforced composite materials with thermoplastic polymer. The possibility of extending the PINN-SE inputs to multimodal data, such as sequences of temporal 2D images and to scenarios involving variable geometries, is also explored. The results show that combining multiple encoders with the previously proposed method (Elaarabi et al., 2025b) is feasible, we also show that training the model on synthetic data generated based on experimental data can help the model to generalize well for real experimental data, unseen during the training phase.
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