The p-AAA algorithm for data driven modeling of parametric dynamical systems

The p-AAA algorithm for data driven modeling of parametric dynamical systems
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用于参数动力系统数据驱动建模的 p-AAA 算法

DOI:
--
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发表时间:
2020
期刊:
arXiv.org
影响因子:
--
通讯作者:
S. Gugercin
S. Gugercin
中科院分区:
--
文献类型:
--
作者:
Andrea Carracedo Rodriguez;S. Gugercin

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AAA算法已经成为数据驱动的单变量函数(如线性动力系统的传递函数)的有理逼近的流行工具。在许多重要应用中出现的参数动态系统的设置中,要建模的基础(传递)函数是多变量函数。考虑到这一点,我们开发的AAA框架近似的多元函数,其中的逼近构造在多元重心的形式。该方法是数据驱动的,在这个意义上,它不需要访问完整的状态空间数据,只需要功能评估。我们讨论矩阵值函数的情况的扩展,即,多输入/多输出动力系统,并提供了一个连接到切向插值理论。几个数值例子说明了所提出的方法的有效性。
The AAA algorithm has become a popular tool for data-driven rational approximation of single variable functions, such as transfer functions of a linear dynamical system. In the setting of parametric dynamical systems appearing in many prominent applications, the underlying (transfer) function to be modeled is a multivariate function. With this in mind, we develop the AAA framework for approximating multivariate functions where the approximant is constructed in the multivariate Barycentric form. The method is data-driven, in the sense that it does not require access to full state-space data and requires only function evaluations. We discuss an extension to the case of matrix-valued functions, i.e., multi-input/multi-output dynamical systems, and provide a connection to the tangential interpolation theory. Several numerical examples illustrate the effectiveness of the proposed approach.
应用于频率相关线路建模的多功能AAA算法
DOI: 10.1109/pesgm41954.2020.9281536
发表时间: 2020
期刊: 2020 IEEE Power & Energy Society General Meeting (PESGM
影响因子: --
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