从噪声轨迹中学习多种哈密顿系统,保证物理稳定性与预测精度。
Learning Generalized Hamiltonian Dynamics with Stability from Noisy Trajectory Data
- 基于变分贝叶斯推断,无监督学习多类哈密顿动力学。
- 在含噪稀疏数据下实现能量守恒与耗散系统的统一建模。
- 引入稳定性约束提升模型物理正确性,适合物理模拟与控制领域。
我们提出一种鲁棒框架,基于变分贝叶斯推断,从含噪声、稀疏的相空间数据中无监督地学习各类广义哈密顿动力学。尽管保守、耗散与端口-哈密顿系统在封闭系统中初始总能量相同,但单一哈密顿网络难以捕捉相空间中不同系统间动态与物理的差异。为此,我们扩展了稀疏辛随机傅里叶高斯过程,结合对哈密顿景观的逐次数值估计,采用适用于保守、耗散及端口-哈密顿系统的广义状态与共轭动量形式。除核化证据下界(ELBO)损失外,还引入稳定性和守恒性约束作为可调超参数损失项,正则化模型多梯度,确保物理正确性,提升预测精度并保持不确定性有界。
原文摘要 · Abstract (English)
We introduce a robust framework for learning various generalized Hamiltonian dynamics from noisy, sparse phase-space data and in an unsupervised manner based on variational Bayesian inference. Although conservative, dissipative, and port-Hamiltonian systems might share the same initial total energy of a closed system, it is challenging for a single Hamiltonian network model to capture the distinctive and varying motion dynamics and physics of a phase space, from sampled observational phase space trajectories. To address this complicated Hamiltonian manifold learning challenge, we extend sparse symplectic, random Fourier Gaussian processes learning with predictive successive numerical estimations of the Hamiltonian landscape, using a generalized form of state and conjugate momentum Hamiltonian dynamics, appropriate to different classes of conservative, dissipative and port-Hamiltonian physical systems. In addition to the kernelized evidence lower bound (ELBO) loss for data fidelity, we incorporate stability and conservation constraints as additional hyper-parameter balanced loss terms to regularize the model's multi-gradients, enforcing physics correctness for improved prediction accuracy with bounded uncertainty.
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