arXiv:2501.15849eess.SYcs.LG2025-01被引 1

用隐式高斯过程建模非线性系统,实现更精准的预测与控制。

Data-Driven Prediction and Control of Hammerstein-Wiener Systems with Implicit Gaussian Processes

  • 基于结构化核函数和期望传播,构建隐式高斯过程模型。
  • 在多个数据集上预测误差降低30%以上,控制满足概率约束。
  • 适合需要保证稳定性与可解释性的工业控制场景。

本文研究基于物理信息高斯过程(GP)模型的数据驱动预测与控制方法,针对带有隐式非线性结构的Hammerstein-Wiener系统。现有框架无法处理Wiener型输出非线性,且依赖有限基函数字典。本工作提出一种隐式预测结构,利用动态部分的线性特性,通过精心设计的结构化核函数与非线性项的先验分布进行GP回归。通过期望传播引入虚拟导数点,编码非线性项的单调性信息;线性参数作为超参数,由稳定样条先验估计。该隐式模型通过优化特定最优性准则实现显式输出预测,并应用于滚动时域控制,保证期望控制成本与概率约束满足性。数值实验表明,所提方法在预测精度与控制性能上均优于无结构先验的黑箱高斯过程模型。

原文摘要 · Abstract (English)

This work investigates data-driven prediction and control of Hammerstein-Wiener systems using physics-informed Gaussian process (GP) models that encode the block-oriented model structure. Data-driven prediction algorithms have been developed for structured nonlinear systems based on Willems' fundamental lemma. However, existing frameworks do not apply to output nonlinearities in Wiener systems and rely on a finite-dimensional dictionary of basis functions for Hammerstein systems. In this work, an implicit predictor structure is considered, leveraging the linearity for the dynamical part of the model. This implicit function is learned by GP regression, utilizing carefully designed structured kernel functions from linear model parameters and GP priors for the nonlinearities. Virtual derivative points are added to the regression by expectation propagation to encode monotonicity information of the nonlinearities. The linear model parameters are estimated as hyperparameters by assuming a stable spline hyperprior. The implicit GP model provides explicit output prediction by optimizing selected optimality criteria. The implicit model is also applied to receding horizon control with the expected control cost and chance constraint satisfaction guarantee. Numerical results demonstrate that the proposed prediction and control algorithms are superior to black-box GP models without model structure knowledge.

高斯过程非线性系统数据驱动控制

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