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arXiv 1804.07565math.OCmath.AP
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非线性偏微分方程分析与控制的矩与凸优化

Moments and convex optimization for analysis and control of nonlinear partial differential equations

Milan Korda, Didier Henrion, Jean-Bernard Lasserre

摘要:

本文提出了一种基于凸优化的非线性偏微分方程的分析与控制框架。该方法使用一个特殊的弱嵌入的非线性偏微分方程,导致在一个线性方程的空间中的Borel措施。然后,该方程被用作无限维线性规划问题(LP)的约束。这个LP然后近似由一个层次的凸,有限维,半定规划问题(SDPs)。在分析不受控制的偏微分方程的情况下,这些SDP的解决方案提供了一个特定的,可能是非线性的,功能的偏微分方程的解决方案的界限;在偏微分方程控制的情况下,这些SDP的解决方案提供了一个给定的最优控制问题以及次优反馈控制器的最优值的界限。整个方法是纯粹基于凸优化,不依赖于时空网格,即使PDE解决可以是完全非线性的。该方法适用于非常广泛的一类多项式数据的非线性偏微分方程。对计算复杂性进行了分析,并描述了几种降低计算复杂性的方法。数值例子证明了这种方法。

英文摘要:

This work presents a convex-optimization-based framework for analysis and control of nonlinear partial differential equations. The approach uses a particular weak embedding of the nonlinear PDE, resulting in a linear equation in the space of Borel measures. This equation is then used as a constraint of an infinite-dimensional linear programming problem (LP). This LP is then approximated by a hierarchy of convex, finite-dimensional, semidefinite programming problems (SDPs). In the case of analysis of uncontrolled PDEs, the solutions to these SDPs provide bounds on a specified, possibly nonlinear, functional of the solutions to the PDE; in the case of PDE control, the solutions to these SDPs provide bounds on the optimal value of a given optimal control problem as well as suboptimal feedback controllers. The entire approach is based purely on convex optimization and does not rely on spatio-temporal gridding, even though the PDE addressed can be fully nonlinear. The approach is applicable to a very broad class nonlinear PDEs with polynomial data. Computational complexity is analyzed and several complexity reduction procedures are described. Numerical examples demonstrate the approach.

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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