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arXiv 2205.08048eess.SYcs.SYmath.DS
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动力系统的Koopman表示简介

A Short Introduction to the Koopman Representation of Dynamical Systems

Bassam Bamieh

摘要:

Koopman表示是线性或非线性动力系统的无限维线性表示。它表示输出映射(也称为可观测量)的动态,输出映射是状态空间上的函数,其求值被解释为输出。概念上简单的推导和评论的库普曼表示。我们强调初始条件和输出映射的原始系统,和那些库普曼表示之间的重要的对偶性。当这种表示用于数据驱动的应用程序(如动态模式分解(DMD)及其变体)时,这种二元性是一个重要的考虑因素。Koopman表示和质量输运的转移算子之间的伴随关系也被示出。

英文摘要:

The Koopman representation is an infinite dimensional linear representation of linear or nonlinear dynamical systems. It represents the dynamics of output maps (aka observables), which are functions on the state space whose evaluation is interpreted as an output. Conceptually simple derivations and commentary on the Koopman representation are given. We emphasize an important duality between initial conditions and output maps of the original system, and those of the Koopman representation. This duality is an important consideration when this representation is used in data-driven applications such as the Dynamic Mode Decomposition (DMD) and its variants. The adjoint relation between the Koopman representation and the transfer operator of mass transport is also shown.

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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