arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2401.07862eess.SYcs.AIcs.LGcs.SYmath.DSmath.OC
收藏

基准双曲型偏微分方程的自适应神经算子反步控制

Adaptive Neural-Operator Backstepping Control of a Benchmark Hyperbolic PDE

University of California, San Diego(加利福尼亚大学圣迭戈分校)

Maxence Lamarque, Luke Bhan, Yuanyuan Shi, Miroslav Krstic

AI总结:

本文首次将神经算子用于基准一维双曲型PDE的自适应反步控制,以离线训练网络替代每步求解增益核PDE,并通过Lyapunov分析实现全局镇定,仿真显示加速达三个数量级。

摘要:

为了镇定偏微分方程(PDE),反馈控制器需要增益核函数,而这些增益核函数本身也由 PDE 支配。此外,这些增益核 PDE 依赖于 PDE 被控对象的函数系数。PDE 被控对象中的函数系数通常是未知的。这要求对 PDE 控制采用自适应方法,即在控制的同时对被控对象系数进行估计,其中每当被控对象系数函数估计更新时,都必须在每个时间步求解一个单独的增益核 PDE。在每个时间步求解 PDE 计算代价高昂,是实现 PDE 实时自适应控制的障碍。最近,神经算子(NO)逼近函数映射的研究成果已被引入 PDE 控制,用于将增益核的计算替换为神经网络:该网络离线训练一次,并在实时中重复使用以快速求解 PDE。在本文中,我们首次给出了将 NO 应用于自适应 PDE 控制的结果,并针对一个具有回流的一维基准双曲型 PDE 进行了展示。我们通过 Lyapunov 分析在被控对象状态和参数误差状态上建立了全局镇定,并提出了一种基于无源辨识器的替代方法,该方法避免了对核可微性的强假设。随后,我们给出了数值仿真,展示了稳定性并观察到高达三个数量级的加速,突显了神经算子在自适应控制中的实时有效性。我们的代码(Github)已公开,供未来研究者使用。

英文摘要:

To stabilize PDEs, feedback controllers require gain kernel functions, which are themselves governed by PDEs. Furthermore, these gain-kernel PDEs depend on the PDE plants' functional coefficients. The functional coefficients in PDE plants are often unknown. This requires an adaptive approach to PDE control, i.e., an estimation of the plant coefficients conducted concurrently with control, where a separate PDE for the gain kernel must be solved at each timestep upon the update in the plant coefficient function estimate. Solving a PDE at each timestep is computationally expensive and a barrier to the implementation of real-time adaptive control of PDEs. Recently, results in neural operator (NO) approximations of functional mappings have been introduced into PDE control, for replacing the computation of the gain kernel with a neural network that is trained, once offline, and reused in real-time for rapid solution of the PDEs. In this paper, we present the first result on applying NOs in adaptive PDE control, presented for a benchmark 1-D hyperbolic PDE with recirculation. We establish global stabilization via Lyapunov analysis, in the plant and parameter error states, and also present an alternative approach, via passive identifiers, which avoids the strong assumptions on kernel differentiability. We then present numerical simulations demonstrating stability and observe speedups up to three orders of magnitude, highlighting the real-time efficacy of neural operators in adaptive control. Our code (Github) is made publicly available for future researchers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑