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arXiv 2411.14031math.OCcs.NAmath.APmath.NA
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使用拉格朗日方法的抛物型偏微分方程数值零能控性

Numerical null controllability of parabolic PDEs using Lagrangian methods

Enrique Fernandez-Cara, Roberto Morales, Diego A. Souza

AI总结:

本文提出基于拉格朗日与增广拉格朗日方法并结合无界时间权重的数值框架,求解多维抛物型方程在小子集分布控制下的零能控性问题,并通过2D和3D数值实验验证其有效性。

摘要:

本文研究了几维线性抛物型方程和系统的零能控性问题的若干理论与数值问题。控制是分布式的,并作用于区域的一个小子集上。主要目标是数值计算一个控制,使状态的数值近似从给定的初始数据精确驱动到零。我们引入了一种在某种意义上新的求解数值能控性问题的方法。主要思想是将经典拉格朗日和增广拉格朗日技术应用于合适的带约束极值公式,这些公式涉及在时间上无界的权重,从而使全局Carleman不等式成为可能。理论结果通过空间二维和三维问题的令人满意的数值实验得到验证。

英文摘要:

In this paper, we study several theoretical and numerical questions concerning the null controllability problems for linear parabolic equations and systems for several dimensions. The control is distributed and acts on a small subset of the domain. The main goal is to compute numerically a control that drives a numerical approximation of the state from prescribed initial data exactly to zero. We introduce a methodology for solving numerical controllability problems that is new in some sense. The main idea is to apply classical Lagrangian and Augmented Lagrangian techniques to suitable constrained extremal formulations that involve unbounded weights in time that make global Carleman inequalities possible. The theoretical results are validated by satisfactory numerical experiments for spatially 2D and 3D problems.

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。

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