arXiv:2506.06188cs.LG2025-06被引 6

用物理定律训练神经网络,实现无数据流体系统的实时控制。

Physics-Informed Neural Networks for Control of Single-Phase Flow Systems Governed by Partial Differential Equations

  • 将物理信息神经网络扩展到偏微分方程,分稳态与瞬态两阶段建模。
  • 仅用物理规律训练,即可精准模拟流动并实现实时控制。
  • 适合工程中无需标注数据的流体监测与优化场景。

基于偏微分方程(PDE)的单相流系统建模与控制在瞬态条件下面临挑战。本文将此前用于常微分方程(ODE)的物理信息神经网络控制框架(PINC)扩展至PDE情形,尤其针对不可压缩和可压缩单相流动,融合神经网络与物理守恒律。PINC-PDE模型分为两阶段:稳态网络学习不同控制输入下的平衡解,瞬态网络捕捉时变边界条件下的动态响应。提出一种简化假设,降低初始条件的空间维度,从而高效训练PINN。该简化使模型预测控制(MPC)策略得以推导。数值实验表明,仅基于物理定律训练的PINN能准确表示流动动力学,并支持实时控制。结果凸显其无需迭代求解器即可高效逼近PDE解的能力,为工程中流体监测与优化提供了有前景的替代方案。

原文摘要 · Abstract (English)

The modeling and control of single-phase flow systems governed by Partial Differential Equations (PDEs) present challenges, especially under transient conditions. In this work, we extend the Physics-Informed Neural Nets for Control (PINC) framework, originally proposed to modeling and control of Ordinary Differential Equations (ODE) without the need of any labeled data, to the PDE case, particularly to single-phase incompressible and compressible flows, integrating neural networks with physical conservation laws. The PINC model for PDEs is structured into two stages: a steady-state network, which learns equilibrium solutions for a wide range of control inputs, and a transient network, which captures dynamic responses under time-varying boundary conditions. We propose a simplifying assumption that reduces the dimensionality of the spatial coordinate regarding the initial condition, allowing the efficient training of the PINC network. This simplification enables the derivation of optimal control policies using Model Predictive Control (MPC). We validate our approach through numerical experiments, demonstrating that the PINC model, which is trained exclusively using physical laws, i.e., without labeled data, accurately represents flow dynamics and enables real-time control applications. The results highlight the PINC's capability to efficiently approximate PDE solutions without requiring iterative solvers, making it a promising alternative for fluid flow monitoring and optimization in engineering applications.

物理信息网络流体控制偏微分方程模型预测控制

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